The bouma of space craft

raph
7.Apr.2005 2.39pm
raph's picture

We have a number of threads going about spacing. Please forgive me for starting a new thread attempting to tie them together.

In Creative Suite 2, we have a rousing debate about the merits of the "optical kerning" feature of InDesign (which is actually Kernus licensed from URW).

In the massive TYPO 13 thread, largely devoted to competing theories of letter recognition and the role of the bouma, there is a subthread on spacing, kicked off by five questions including "what letterspacing optimizes readability?" There is a new thread continuing the investigation into the human visual system, but I'd really like to see the spacing discussion continued.

There's a small thread entitled Theory of Spacing, worth referencing if for no other reason than Nick Shinn's beautiful graphic illustrating his own approach to spacing.

In context of Kernus, here are some observations and opinions I'd like to offer.

I think what Adobe is doing is slowly recovering from the loss of optical scaling in the transition from metal to digital. You see that with their release of optically scaled families (such as Slimbach's brand new Garamond Premier), but I think Kernus also plays a role, for the probable case where the font is not available in optically scaled variants.

To briefly sum up what I've learned about Benton's optical scaling technology implemented about 100 years ago, there are four major things that happen to a font as the size scales down:

1. The stroke weight increases, essentially implemented by stroking the outline with a fixed-width circular pen. Doing it this way also has the important effect of reducing stroke contrast. For example, let's say that the font at large sizes has a 2:1 stroke contrast, and at 6pt the thin and thick strokes are 5 and 10 mils, respectively. Let's also say that the radius of the circular pen is 2 mils. Then the resulting strokes are 9 and 14 mils, a contrast of approximately 1.5:1.

2. The width increases, based on linear nonuniform scaling (the same affine transform technology responsible for Squooshing, implemented using pantographs).

3. Extenders (particuarly descenders) shorten, or to put it another way, the x-height increases.

4 (and most important to this thread). The fit becomes looser.

I haven't collected serious data yet (I need to code up some tools to extract spacing from scans), but from eyeballing the ATF books, I'm sure that that the looser fit is not just a matter of adding the same hairline space between each letter pair (or, equivalently, adding half that space to the left and right side of each letter). Rather, I believe that both large and small sizes were fit individually.

At text sizes, I consider the ATF fonts a landmark example of good fit; in other words, I believe that the fit is better than the majority of digital faces available today. Most strikingly, the fit is good even for difficult words such as "power"; today you would expect even color in this word without additional kerning of the "ow" pair. See p. 536 of the ATF 1923 book (Century Catalogue) for example.

At larger sizes, the fit is not nearly so good (see, for example, the very uneven "power" in the 18-point sample on p. 537, but I believe it is still close to the best that can be done given the limitations of metal.

I believe that the perception of the space between letters is dependent on scale. At text sizes, I believe the eye sees mostly the space between the strokes (as is emphasized by Tracy's "Letters of Credit" approach and this tutorial). Serifs have a relatively minor contribution.

At larger sizes, I think the perception of spacing incorporates more delicate features of the lettershapes, particularly serifs. In other words, the perception of space between letters is more closely approximated by the actual length of the gap between the two letters. To set "noonn" tightly requires shaving a lot more space from the "no" and "on" pairs than from "oo". I'll illustrate:

example of tracking, 100 dpi


application/pdfexample of tracking, PDF
tracking.pdf (12.7 k)



To my eyes, at 12pt, Adobe Caslon Std looks just fine with the metrics, or with no kerning at all (the metrics call for -5 on the "on" pair). InDesign's optical kerning feature shaves 13 from "no", 14 from "on", and adds 6 to "nn". To my eyes, this is not an improvement; it makes the "on" and "no" appear crowded.

At 72pt, though, the story is altogether different. Not only is the fit too loose, but the "no" and "on" pairs appear gappy. Applying -30 tracking helps with the overall looseness, but makes the relative "no" and "on" gaps that much worse. The "optical kerning" feature here does almost exactly the right thing.

Combining tracking and optical kerning does not always yield good results. Adding +17 tracking (to keep the oo pair at the same spacing as the original) works well, but -20 tracking (for an overall tight effect) does not. The "oo" pair is too close for comfort relative to the rest of the word. I included a hand-spaced tight setting for comparison.

From all this, I draw these conclusions:

1. Optimal fit is highly scale dependent -- the smaller, the looser.

2. The perception of space is also scale dependent -- the larger, the more delicate features such as serifs affect the perception of space.

3. Adding constant tracking to a good fit at one scale yields a bad fit at a different scale. This fact strongly supports conclusion 2.

Unless one is designing a Multiple Master font or an optically scaled series, current digital font technology forces a "one size fits all" approach. Kernus is an improvement in that it will space a single font fairly well at different scales, but is still not as good as hand-fitting with the size taken into account.

I must say that this has been quite a learning experience for me. It was bad enough when I'd start tuning out the world around me because I was distracted by letterforms, but now I find myself constantly looking at the spaces between letters. A casual observer could easily conclude that I'm out of my mind. I look forward to continuing this discussion with the rest of you out there who are obsessed at looking at what isn't there.



enne_son
7.Apr.2005 3.23pm
enne_son's picture

You beat me to the punch Raph.
Besides pressing for a continuation of our investigation of the human visual system, I wanted to try and construct a bridge between the matters raised in my Typo_13 text and those under discussion in the http://www.typophile.com/cgibin/show.pl?30/68218 'visual communication' forum (as well as the 'creative suite' one you mention) and then relate that to your FontFocus whitepaper.

So I guess I'll put that here when it's ready.

The relevant statement in my Typo_13 text is: If spacing between letterforms is not in synchronicity with the space inside enclosed forms


billtroop
7.Apr.2005 11.14pm
billtroop's picture

Raph, although I agree with your approach to discerning correct optical values, that is, studying how ATF did it, I have several points of divergence.

1. You are likely to see better examples of optical compensation in some Monotype and Linotype families because ATF fonts were often optically sized from a single master drawing using expert manipulations of the pantograph. Mac McGrew has been extremely informative on this point, though I don't think he has published everything he knows. I don't really think anything can beat the achievements of the Mono and Lino drawing offices _when they were at their best_. I would rashly and roughly place peak points as the late 20s for Mono and the mid 50s for Lino.

2. There has always been a distressing tendency amongst good designers and technicians to space o shapes too widely. Adobe Caslon is but one of a countless thousands of examples. By contrast, Benton, at the end and apotheosis of his career was spacing o's very tightly, as for example in his last completed typeface, Benton. This is the approach I prefer, but it is not a majority position.

3. Adobe Caslon is not a good example for setting at 72 points because it is explicitly designed not to be used about 14 points. (It would be interesting to see what Indy does to a variety of words with Big Caslon at 72 points.)

4. Confining the test only to no/on combinations does not begin to show the problems 'optical kerning' can get you into. Comparison should also be made at a variety of type sizes. It is not necessary to go to the trouble of illustrating every combination, since the curious can easily replicate the settings on their own computers.

5. Adobe has never in the past been able to make a proper optically scaled font because of the corporate mandate to ensure that 72 point type is usable at 6 point, and vice versa. This idiot proofing of the product is understandable but should be dropped. Has it been dropped in the new Garamond? I doubt it. I've had it sitting on the shelf for months and I suppose I will now actually have to look at it.

6. An ideal optical axis is not achievable with simple interpolation as we know it. Perhaps with EvB's superpolation, but that's another story. That's a technology I have been meaning to explore for some time. In any case, the new Garamond is of course a multiple master, even though just a few instances are being sold in the OT version. But notably, it was designed as two entirely separate MMs, one for text sizes, and one for display. That said, I do not see how even the most expert manipulation of MM technology can produce an ideal scale in the 6-12 point range. It is for this reason that Stone does not use it in his Cycles series, which is the closest we come in digital to a series of types drawn with the same attention to size optimization as was routine before 1960.


raph
8.Apr.2005 4.11pm
raph's picture

Thanks for your response, Bill.

1. More master drawings does not always equal better. In fact, one of the things I find appealing about the ATF Bodoni series is its butter-smooth consistency across the entire size range. Bodoni is well suited to this consistency, while of course for a Garamond you have to make the counters smaller at bigger sizes and so on.

What specific Mono and Lino fonts do you consider do be more technically skillful than the best of the ATF fonts? My Lino book is from the early '30s, and has some pretty good examples but nothing that really blows me away. I don't have enough Mono material to judge -- I've studied Centaur very carefully, but I certainly wouldn't consider it a better example of technical excellence than, say, Cloister. Among the refinements of the latter are variant short- and long-tail R's, fairly important in a Jensonian. Among the flaws is a very thin right side bearing for the 'e' in the 16pt size, and a fat one for the 'r'. (needless to say, the Centaur design itself is superior in many ways to Cloister, but that's as true of the Wiebking cuts as the Monotype)

2. I don't see the same trend in Benton's 'o' spacing that you do. The 'o' space in his 1900 Century Expanded is much tighter than Benton/Whitehall (I'm looking at 10pt samples in the 1934 ATF book). What I do see is consistently generous 'o' spacing at text sizes, and consistently tight 'o' spacing in display.

3/4. I chose AC solely because of the prominent serifs, and the noonn spacing solely because it draws attention to the philosophical underpinnings of spacing: are you spacing the stems and mostly ignoring the serifs (as recommended by Tracy), or are you mostly paying attention to the closest approach between the two letters (e.g. the serifs for the nn pair)? I am not at this point doing an exhaustive review of InDesign's kernus. Isn't that the job of, uh, writers in the trade press and industry consultants?

6. You're conflating a whole bunch of different things here: design for optical scaling, linear interpolation, Multiple Master technology itself, and Adobe's use of it. MM is actually capable of many tricks other than straight linear scaling, but suffers from the same problem as Metafont: while powerful, you have to be a computer scientist to effectively use all the features.

In any case, even though I am one, I don't plan on using MM as the basis for my optically scaled releases. Because I am stark raving mad, I am designing my own font technology from scratch. It bugs the hell out of me that I don't really grok spacing yet.

And now, a fun challenge:


application/pdfTake the challenge!
ccat.pdf (28.4 k)



Both columns are my Century Catalogue in 10 pts, and in one I've enabled InDesign's optical kerning (Kernus). Please print this out on a high quality printer, and post your answers to these questions: Which column is better? How much better? Why? Which one do you think is which is which? Why do you think so? I invite all typophiles to comment; among other things I want to find out whether most people see the same thing, or wether perception of spacing is hugely subjective. I'll post the answers and my thoughts in a bit.


Nick Shinn
8.Apr.2005 6.06pm
Nick Shinn's picture

The one on the right is Kernus.
I prefer the other, because it is taut in the appropriate places, with the authentic spacing of a metal-era serifed type. The spacing is part of the type design.

(Nice face.)


hrant
8.Apr.2005 7.14pm
hrant's picture

Note: Looking at that PDF is the only thing in this (entirely worthy) thread I've really paid attention to so far. The bills, you see.

--

The one on the right is clearly better, more even. If you actually do want fauve spacing for some reason, that's a different story. And I think Nick is hedging.

Before I can make a good guess which might be InDesign, I need to know how good a spacer you are! :-) But a "raw" guess would be the right one, since it's more regular, and that's what algorithms are good at.

hhp


Joe Pemberton
8.Apr.2005 9.46pm
Joe Pemberton's picture

[As an aside here, thanks for consolidating this topic so nicely Raph. I think you're going to LOVE the new Typophile.]


Thomas Phinney
8.Apr.2005 10.08pm
Thomas Phinney's picture

InDesign's optical kerning is definitely the one on the right. No question. One can tell because of the cases where letter features from adjacent letters almost touch on the left sample but have been spaced out on the right, like "Wh" and "rn."

Overall, I think I like your spacing better. But there are a few cases where I prefer InD's work. I'm curious: which treatment do people prefer for the e-apostophe-s combo in "nature's" on line 5? I think I like the way InD has tucked the "s" in nice and tight, but I can imagine this won't be to everybody's taste.

Just a couple of comments on InDesign's optical kerning:

1) Personally, I tend to use well-spaced fonts with decent kerning, and I only turn on optical kerning on the fly for specific problem combinations that were not kerned at all in the font. For example, the "nT" combo in OpenType frequently gives me trouble. Dang interCap words!

2) Remember, it's just another feature. It's not on by default. You don't like it, you don't have to use it! Personally, I find there are some fonts whose overall spacing seems improved by turning it on, but they're generally not fonts I would use.

Finally, I would just note that Adobe bought, rather than licensed, the relevant patent and source code (when the original URW went bust, I think). I know that some further modifications were made, so calling it "Kernus" is not really quite accurate - though it's certainly descended from the Kernus technology.

Cheers,

T


Nick Shinn
9.Apr.2005 3.29am
Nick Shinn's picture

>If you actually do want fauve spacing for some reason, that's a different story.

"Wild beast spacing"? I would say that prefering the original spacing paradigm for metal era fonts is more like a preference for "original instruments" in listening to Baroque music. In terms of glyph finish, Storm's work is along the same lines with his funky versions of the classics.

"hedging"

No way, dude.

>e-apostophe-s combo

IMO, the tighter fit of Optical looks better here, but the reason is that Raph's space character is quite narrow. In general, the appearance of "apostrophization" should be related to word spacing. When I first started kerning fonts, I tended to overdo it, and the apostrophe is one instance where that's easy to do. However, more recently, I've come to appreciate that there are certain glyphs where ample sidebearings are part of the character -- the apostrophe and the figure 1 being the most obvious. In fact, getting really precise, it may be a good idea to have separate glyphs (although the BCPs could be identical), differently fitted, for the apostrophe and single quote. And of course, with OpenType, that's possible! Christopher Slye or Adam Twardoch (Zapfino Extra) have probably already done it.

Are the apostrophe and the quotemark separate Unicode characters?

>Just a couple of comments on InDesign's optical kerning

I agree with you completely Thomas. But I woud add that I am critical of "Optical" spacing for two reasons:

(1) The myth of poorly spaced indie fonts. It's tempting for many people to think that there is a technological fix for the amateurishness of fonts from "boutique" foundries. That's the myth. The reality is that the virtues of "Optical" technology are quite modest, and that spacing is an aesthetic and cultural quality of types which shouldn't be given the "one size fits all" treatment. Many Indie foundries do brilliant spacing. Some may do "dodgy" spacing, but it is nonetheless a quality of their work, which should not be quantified and eradicated by a megacorp bot.

(2) By engaging in critical discussion of Optical, we gain a better understanding of the threshold between what is appropriate for automation, and what still requires manual work. While I am aware of the benefits (and inevitability) of progress, I favor a balanced approach somewhere between "the old way was best" and "let's automate everything".


dan_reynolds
9.Apr.2005 4.20am
dan_reynolds's picture

Some may do "dodgy" spacing, but it is nonetheless a quality of their work, which should not be quantified and eradicated by a megacorp bot.

Wait a minute


Nick Shinn
9.Apr.2005 5.12am
Nick Shinn's picture

>why can't you call a spade a spade

Dan, you're a Philistine ;-)

Which particular standards body would you refer to in determining whether or not a font is bad? You have seen from this thread that there is disagreement between typohiles as to what constitutes good spacing. Why do you propose that one person's, or one corporate committee's idea of what good spacing algorithms are, should be implemented as widely available software? That kind of de facto standardization would be pretty dire, like a cheesy Photoshop/Fireworks filter pre-set.

Ultimately, there is no such thing as a bad typeface, only inappropriate usage.

Besides, I've yet to see conclusive proof of "Optical" fixing up the spacing of a "bad" font. Hrant thought it would be a piece of cake with Mrs Eaves, but it didn't turn out like that.


dan_reynolds
9.Apr.2005 5.23am
dan_reynolds's picture

Dan, you're a Philistine ;-)

That's probably the nicest thing I have been called all year!


Ultimately, there is no such thing as a bad typeface, only inappropriate usage.

This is just a platitude. While there *may* not be such a thing as a bad typeface, there are certainly bad fonts. If I make a font and sell it to you, and it doesn't even function properly, then it is a bad font. No brilliant use on your part will be able to save it,* and chances are that brilliant use with such a poor quality tool would be highly unlikely.

So, I'm saying that there IS such a thing as a bad font: this is not a design issue, but rather a production one.


Besides, I've yet to see conclusive proof of "Optical" fixing up the spacing of a "bad" font. Hrant thought it would be a piece of cake with Mrs Eaves, but it didn't turn out like that.

I don't have the depth to objectively evaluate InDesign's optical spacing feature, although I do use it occasionally, and have been pleased with its results. However, I didn't say that the InDesign feature was good, I said that if a manufacturer were to pull off something which really would improve poorly spaced fonts, that would be praiseworthy. I'm sure that many graphic designers and software users would agree with that.


*Even if you, with your excellent capabilities, could make good design with a bad font, that doesn't mean that the average user would be able to discover enough work-arounds.


hrant
9.Apr.2005 8.01am
hrant's picture

If Raph wants to produce anachronistic work, then of course you wouldn't consider Optical spacing. But I give him more credit than that. Many people who do decide to revive adopt the position of trying to take the intent of the original (not its every flawed detail) and make something usable today. Nick, you of all people should appreciate that.

Bad fonts? We're surrounded by them!

hhp


Nick Shinn
9.Apr.2005 9.43am
Nick Shinn's picture

>So, I'm saying that there IS such a thing as a bad font: this is not a design issue, but rather a production one.

I agree completely. As you noted, I said there is no such thing as a bad TYPEFACE, only inappropriate usage. That's not a platitude, it's a philosophy.
"There are no wrong notes" -- Monk

>the intent of the original (not its every flawed detail)

It's usually the "flawed" details that produce the most useful developments.


enne_son
9.Apr.2005 10.04am
enne_son's picture

About Raph's challenge:

Mostly what I see, I see at a glance. There is a perceptible distance on what I called in Typo 13 the 'gestural-atmospheric' axis. The text on the left is more even and regular and quietier, the one on the right more assertive and active and generally a tad darker, but having said that, I have to say the distances between them are quite slight. I cannot say the one is right, the other wrong, or the one is good the other bad.
Both are readable on my screen. Readability and legibility are, I am coming to believe, gross measures. Legibility of type is a matter of thresholds (perceptual discrimination affordances at a distance, or small size or in inferior lighting); Readability of a type-in-use a matter of degrees (visual wordform resolutional affordances, which seem to be quite generous). Spacing and rendering are matters of tolerences. Beyond a certain point (and the allowances might be quite sensitive) space manipulation alters the gestural-atmospheric consistency or character of the typeface.
Does optical spacing cause that kind of shift? and if so, do we prefer the gestural-atmospheric 'attack' of the altered protocol?
For the purpose of continuous reading both spacing implementations seem tolerable. On closer inspection the column on the left shows a level of refinement the one on the right doesn't have. I see this in the 'Wh' combination of the opening word, and the decision about where to break the line in line 9&10 of the second paragraph. However, the spacing of powers' at the end of line 3 seems worse. So how to fix (with optical kerning) the "Wh" of the second without touching 'power' if we want it's gestural-atmospheric mood?
Which 'attack' would I prefer? Depends on the character of the text I am setting, and the medium (newspaper / book / magazine / etc).


hrant
9.Apr.2005 10.26am
hrant's picture

> That's not a platitude, it's a philosophy.

Yeah, a bad one.

> It's usually the "flawed" details that
> produce the most useful developments.

No, it's "fringe" concepts.

When a metal font has an overly-loose "v" because its longish serifs might break in usage because the alloy is cheap, reproducing that in digital is not of this age. It's cloying.

--

Peter's observation that the left one (presumably the original spacing) is more "spiky" in its quality than the right one (the presumed Optical), meaning that it has some especially bright and especially dark spots, is in line with what one would expect from heuristics versus algorithmics.

hhp


Nick Shinn
9.Apr.2005 2.25pm
Nick Shinn's picture

>Yeah, a bad one.

No. just different.


pstanley
9.Apr.2005 4.04pm
pstanley's picture

I don't know enough to say which is which. My own subjective view (taking cover):

The left hand column is better.

Only slightly better.

This is based almost entirely on one letter combination "ff" which seems to me to be too widely spaced in the right hand column. An argument, I suppose, for ligatures. "ff" is a common combination and it bothers me perceptibly that it looks wrong.

I think the right hand column spaces "it" too close (compare "it" and "in" on line 1); also perhaps "ie" and "le". To my eyes at least the left is more even on these particular combinations.

On the other hand, the right hand column seems to me to get the "he" space in "the" better: in this case the left hand column seems to put excessive space between those two letters, so that "the" tends (fractionally) towards "th e". (Not helped, to my my eyes, by the "t" falling forwards.)

But (except for the ff, IMHO), neither could be said to be bad.


hrant
9.Apr.2005 5.11pm
hrant's picture

Yeah, and Bush is "just different" than Mother Theresa.

hhp


raph
9.Apr.2005 5.57pm
raph's picture

First, a couple of errata. In the "noonn" graphic, the values for the "optical +17" line should be (-14, 0, -16, 6). This actually changes my evaluation of InDesigns optical kerning somewhat; it is sensitive to scale, but in this example only microscopically. These values vary by only 2 units (out of 1000) from the 12pt optical setting.

Second, in comparing ATF Cloister with Monotype metal Centaur, I want to make clear that the fit flaws I described are in the latter; in my post 236, that was very unclear.

You guys are good! The column on the right is indeed InDesign's optical kerning (and thanks, Thomas, for pointing out that it isn't quite correct to simply call it "Kernus"). On the left is my own attempt to space the font. In fact, it's my third from-scratch stab. This time, I tried really hard to get the side bearings right, then kern with a very light touch. In particular, I made it a point not to kern round-round or serif-round combinations.

I find it fascinating that there isn't unity on which is better (or maybe Hrant is just the outlier whose judgement should not be trusted). Even Paul Stanley's preference for my spacing is suspect, because the lack of the 'ff' ligature is a bug in the font that will get corrected before release.

My spacing could no doubt be improved. In fact, I now consider a comparison against InDesign's optical kerning an important tool in discovering places where spacing can be improved.

The word "powers" is definitely spaced more like a metal face (optical kerning hairline spaces po and kerns owe quite a bit). Because this is a historical revival, I'm not sure that's a bad thing, but InD's optical is also absolutely a valid stylistic choice. I cannot agree, though, for cases such as "liberty", which to my eyes has "ib" too tight and "rty" far too loose.

It's interesting that Peter perceives InDesign's optical kerning as "darker". I fiddled with the tracking values (+3 for my sample, -2 for InDesign) so that they'd take exactly the same amount of total width. To my eyes, there isn't a significant difference in color, so I wonder if this is something that other people see as well.

If you look at just the stems, my sample is far more even (look at "institute", line 15, for a striking example). Here is a fundamental question: is InD's variation in stem spacing signal, or noise? In the frequency analogy, my stems form a stable carrier frequency, with features such as arches added on, while the more varied stem spacing of InD is like frequency modulation of that carrier wave; it will occupy a broader peak of spatial frequencies. (hey, I should run a Fourier analysis!)

You can also look at the spacing, in terms of the "features" concept of Peter's Typo 13 essay. In particular, I space the rvwy class tightly, much more so than InDesign. So, in my spacing of "ty", these two letters visually connect (they're not quite touching, but presumably the gap is so narrow that it wouldn't be seen in the parafovea), while in InDesign the gap between them would count as a visual feature. From a readability standpoint, which feature is better, connection or gap? Are they both functionally useful for recognizing the "ty" pair, perhaps, so the choice is merely aesthetic?

For pairs such as "vi", I strongly prefer my spacing, because it avoids creating a large triangular gap. This is especially so for a word such as "evinces" (4th line from bottom), where the large gap contrasts with the relatively tight ev and nc spaces. (this effect is even worse for the yp pair, as can be seen in one of the nonsense words)

Even so, I'd have to agree with Paul that InDesign's optical kerning isn't bad. In many cases, such as a poorly spaced text font, or if you have Hrant's eyes, it would definitely be an improvement. So I think we can put to rest any assertion that optical kerning should not be used for body text.

It amazes me that spacing is so hard. After all, it's just a handful of numbers. Yet, we often find that people who draw beautiful letter shapes stumble over the problems of spacing (Mrs. Eaves is a commonly cited, and dramatic, example). I wonder to what extent it's possible to understand spacing systematically, or whether it will always remain a black art, with all but the most talented and experienced masters doomed to forever crank out poorly fitted fonts.


Stephen Coles
9.Apr.2005 6.11pm
Stephen Coles's picture

This time, I tried really hard to get the side bearings right, then kern with a very light touch.

That's the way foundries like Bitstream and Font Bureau do it,
so I'm inclined to bet it's the best method. In the one font family
I've spaced this process made the most sense: develop side
bearings for all control characters, then check every possible
pair for kerning needs.


billtroop
10.Apr.2005 12.26am
billtroop's picture

We're not going to get anywhere with Indy/Kernus until we stop treating as a mysterious black box which somehow may, or may not, do the right thing to spacing in some particular case, but instead, approach it as a bad program which generally does bad things in an entirely predictable way, no matter what its input.

This is pretty easy to illustrate. Take the behaviour I illustrated in Adobe Garamond Pro. My objection is that it destroys the font by inserting unwanted space between u and m in the word jumps at 12 points. This is wrong because in any normal font, the distance between u and m has been perfectly spaced. This is not conceivably a letter pair that under any normal circumstances needs spacing repair or additional kerning. To make matters worse, Indy/Kernus also subtracts space between j and u (again, a letter combination invariably perfectly spaced under all normal circumstances) thus entirely distorting the spacing of this most common word.

OK. So what do we do? Stop, for Heaven's sake, acting as if this were a one-off event. Instead, test this same letter combination with a wide variety of fonts.

What I found at once is that for every serif font I tested at 12 points, Kernus/InDesign invariably subtracted space between j and u and added space between u and m. I tested Times, Georgia, Mrs Eaves, Mrs Eaves small and petite caps (slightly different), Palatino, Minion, Courier, Didot, and most illuminatingly, ITC Bodoni Ornaments.

Now, instead of wasting our time looking at nono combinations in a particular font, let's look at a simple row of mmmmm and nnnn

These are again rows that could not conceivably need alteration of any kind.

Yet InDesign/Kernus invariably tampers with them. It generally adds positive space. For example, for both nn and mm, it adds 14 units in Minion at 12 points. (Is there anyone here who can convert this into PS font units? In any case, by any measure, this is a shocking alteration to the most fundamental spacing property of a font.)

For Adobe Caslon by contrast it adds 4 to mm and 6 to nn. For Copperplate Gothic it subtracts 32 units.

I'm sorry folks, but this is a Frankenstein come to life.

This is not behaviour that can possibly be justified by any rational theory of typography or graphic design.

>Finally, I would just note that Adobe bought, rather than licensed, the relevant patent and source code (when the original URW went bust, I think). I know that some further modifications were made, so calling it "Kernus" is not really quite accurate - though it's certainly descended from the Kernus technology.

This gives the erroneous impression, Thomas, that Adobe initiated the relationship with URW. It did not. It inherited the relationship from Aldus, which licensed jack-in-the-box from URW for PageMaker 5. Not for the first time, I express the wish that you would get your Adobe corporate history right! Why should it be up to me to remember these ridiculous arcana?

Is anyone seriously going to tell me that a program which invariably tampers with the nnnn combination of ANY font can be defended on any grounds whatsoever?


raph
10.Apr.2005 9.08am
raph's picture

I don't think it makes much sense just to look at the numbers. You run the risk of making the same kind of mistakes that newbies often make by paying too much attention to the "side bearing" numbers in their font editor; you see way too little space to the right of the j all the time.

Instead, I prefer to follow Peter's approach and concentrate on the visible features, in this case the gaps where the serifs visually connect letters together, and the blocks of space separating the vertical stems.

visual features of "jump"

I've spaced this font according to Tracy's philosophy of making the space between stems even. For this word, the blocks of space are all rectangular, so are easy to quantify. With vee-shapes and rounds, you'd also get triangles and concave lens shapes. With perfectly even stem spacing, the blue blocks would all be square.

Given the pattern of serifs at the top and bottom of the lowercase line, even stem spacing leads to very uneven gap sizes (visualized here as tan circles). In this example, medium, tiny, huge. Indeed, at display sizes the mp pair looks gappy.

From what I can see, InDesign's optical kerning simply applies a different balance to the two visual features, making size of the gaps more consistent, at the expense of making the stem spacing more uneven.

I propose that, at text sizes, stem spacing is more important, and that at display sizes, the gaps at closest approach are also important. Using existing tools conservatively, this suggests designing the metrics of fonts to optimize text sizes, while turning on InDesign's optical kerning for display. Of course, expert spacing by hand is always best, but in the cases where that's not practical, I think what InDesign does is useful.

Of course, what I really want to do here is space the different optical sizes differently, according to the principle of varying relative importance of blocks of space and gaps at closest approach. But that's also clearly a lot more work; otherwise I think most font releases today would be optically scaled.


hrant
10.Apr.2005 11.39am
hrant's picture

The bottom "jump" is spaced much better than the top one. Since Proof can only be positive*, that's your proof right there that Optical spacing can be useful. Not that I think this kiddie-benchmark of proof that some people espouse deserves any attention.

* You can never proove something doesn't exist.

Bill, stop worrying about archaic, non-linguistic control strings,
and optimizing fonts for one point size - that's so 20th century.

hhp


John Hudson
10.Apr.2005 4.46pm
John Hudson's picture

Hrant, I disagree that the lower 'jump' is better spaced. Go and stand on the far side of the room and look at them. In the second, the u is drifting to the left in the space between j and m.


hrant
10.Apr.2005 5.15pm
hrant's picture

Near or far, I'm seeing the bottom one quite close to what I would do by hand, and the top one deviating from that more.

hhp


William Berkson
10.Apr.2005 5.55pm
William Berkson's picture

I agree with Raph and John on this one. I guess the question is whether you think Tracy had the right approach.


John Hudson
10.Apr.2005 5.55pm
John Hudson's picture

Remind me not to ask you to space any fonts for me, Hrant :-)


hrant
10.Apr.2005 9.10pm
hrant's picture

> I agree with Raph and John

?
You mean about the "jump"?
Where are Raph and John agreeing, for you to agree with both?

--

> Remind me not to ask you to space any fonts for me, Hrant

You certainly wouldn't want my White to upstage your Black. :-)

hhp


Nick Shinn
11.Apr.2005 4.15am
Nick Shinn's picture

>It amazes me that spacing is so hard.

It's as hard as you want to make it.

The subject is rhythm, not space, and it can't be reduced to words, numbers, or algorithms, it has to be felt.

To train yourself to feel the rhythm as completely as possible, do a revival (ie facsimile) from scratch with a magnifying glass, rather than tracing scans.


William Berkson
11.Apr.2005 6.32am
William Berkson's picture

>Where are Raph and John agreeing, for you to agree with both?

They agree that the top example is better spaced for text. I concur.


enne_son
11.Apr.2005 7.18am
enne_son's picture

John, Raph, William: in the best of all possible worlds, shouldn't the top 'jump' have even a slight bit more space between the 'j' and the 'u'? (Taking a screen shot of the samples and zooming out in photoshop to text size suggests it might.) Hrant: on what do you base your preference for the o.k. version?


hrant
11.Apr.2005 8.32am
hrant's picture

There is no rhythm in text type. Because there is no flow.
Rhythm is a romantic product of our consciousness, inventing things about our subconscious.

William, Raph wrote "at text sizes, stem spacing is more important", but if you read the previous stuff (not to mention look at the top "jump", which is not spaced purely by stems) you might realize that he [probably] meant relatively more - and I might agree with that. John on the other hand made an outright endorsement for the top one.

> on what do you base your preference for the o.k. version?

"I put my middle finger on the monitor port and feeeel the viiibes, maaan."

No. I use my gray matter to analyze the information from my sense of vision.
Think With Your Brain.


Nick Shinn
11.Apr.2005 9.17am
Nick Shinn's picture

Type design is a craft.
All fonts are hand-made.
One learns by doing, not by theorizing.
Designers think with their hands, drawing on the left side of the brain.
If you think only with your right brain, your designs will lack grace.

Isn't this why you are studying calligraphy, Hrant?


Sergej
11.Apr.2005 9.23am
Sergej's picture

Spacing is hard


William Berkson
11.Apr.2005 9.32am
William Berkson's picture

>shouldn't the top 'jump' have even a slight bit more space between the 'j' and the 'u'?

Yes, I think you're probably right, but I'm not experienced enough to predict how it would look to me without actually trying and looking.


hrant
11.Apr.2005 9.33am
hrant's picture

> One learns by doing, not by theorizing.

One learns to refine existing norms by doing.
One uncovers future potential (ie marks progress) by theorizing.

I study calligraphy to understand. Somewhat like insurance investigators study car crashes...
And one big reason I want to understand is for people to stop using it as an excuse against me, as a diversion for their own failings in the realm of progress/theory. By assimilating the practices that other people (in particular people who resist good theory) know, I can exert more effective pressure.

--

Speaking of theory:
Raph, your theory about the relative balance of stems versus serifs in spacing (which is quite good - I'll be using it) fits very well with "known" theories about optical scale in general: that smaller features have more weight in proportion to size. Just like how serifs need to be stronger for smaller sizes. It makes sense that this applies to the White as well.

Furthermore: The validity of this theory does not preclude InDesign from doing an "adequate" job for both text and display, but -depending on the algorithm- it could indeed mean it's better at one more than the other. If InDesign does not use "feature weight" in its calculations (and I would actually be surprised if it did - it seems quite difficult*), it makes great sense that it would indeed be better at display.

* Too expensive to solve for this industry.

Holding More Water All The Time.


Nick Shinn
11.Apr.2005 9.46am
Nick Shinn's picture

Pardon me Hrant, if I implied that your designs lack grace. Like everyone, you use the left side of the brain when you draw, write and design, thereby thinking with the hand. I studied calligraphy as a practical discipline because it was interesting, enjoyable, and because I thought it might give me a better "feel" for letter forms -- as an adjunct to more academic study. I'm assuming you have some of the same motivation, despite the premium you place on intellectual theory


William Berkson
11.Apr.2005 9.50am
William Berkson's picture

>One learns by doing, not by theorizing.

Making theory and practice a dichotomy is a fundamental mistake. Theory and practice should interact and correct each other. If theory were useless, science would be useless instead of conquering the world, as it has.

"There is nothing so practical as a good theory." - Kant

That being said, in my view the state of theory in reading and typography is not very strong, so the main guide currently for practitioners has to be the eye and experience.


Nick Shinn
11.Apr.2005 9.59am
Nick Shinn's picture

Um, make that drawing on the Right side of the brain.


enne_son
11.Apr.2005 10.03am
enne_son's picture

Hrant, I asked: on what do you base your preference for the o.k. version?
You replied: I put my middle finger on the monitor port and feeeel the viiibes, maaan.
I ask myself: am I to take this as a hostile comment or a trivializing move? Should I see it as directed at myself, or Nick?

Then you say: I use my gray matter to analyze the information from my sense of vision.
Should I read you as being sarcastic here? Or bitter?
I do not see how this helps me understand your preference for the second. Do you mean you think about what visual inspection yields? And is the thrust of this that others don't? Or am I to understand that in theory you prefer the o.k. concept because it address more adequately what the visual cortex's needs? And don't you need to show then that there is a mismatch between what the visual cortex needs and what our obsessions, if that is what they are, with colour or rhythm on a craft level lead us to strive for?
You have not shown there is a mismatch. If I am to trust your perceptions about a mismatch, I will need you to work things out at ths level. You say immersive reading is counterintuitive, but yet you use your intuition to elaborate your understanding of it. And if your intuition is superior, or better grounded, you have an ethical imperative that governs how you behave on line.
I was asking for you to pinpoint specific things about the spacing of the o.k. version that could help me see what you see in the second 'jump'.


You say there is no rhythm, and I say this is like saying there is no God. I am more interested in understanding belief, or what 'range of convenience' a word like rhythm can have 'vis a vis' type than I am in outlawing it. Perhaps you do not find it useful. Others do. And it helps them do good work. So I want to see how the concept of rhythm or colour works itself out in the details of construction, contrast manipulation and space craft. And not just for writing with prefabricated letters, but all writing.


hrant
11.Apr.2005 10.33am
hrant's picture

Nick, I actually do think my forms are not very graceful, but they do have "feeling" - I'm human too after all. But type design can't be all feeling, and some aspects of it -in particular spacing- need to be quite analytical.

Peter, that thing was directed at Nick's "it has to be felt". And not really hostile, more like snide.

To [try to] elaborate more (on the phrase right after that), I would say that I look for good notan (balance/tension among the White/Black), which however depends on intended point size (and I've been assuming that's what the "18" is in Raph's illustration). I squint, move back & forth (like those charmed snakes), and try to see holes & clots. BTW, are you guys squinting (adequately) when you gauge spacing?

> And is the thrust of this that others don't?

I don't know what others are doing. We're each born with slightly different eyes, and of course quite different objectives. The trick is to guess what users want/need.

> You say immersive reading is counterintuitive

To the layman. By looking and thinking, a person can still unlearn one's intuition (because it's not infallible). For example how point sizes that seem most easy to read are in fact a bit too large. But I certaily can't "proove" the validity of my opinions - which however shouldn't stop me from thinking and acting. And each of us has to constantly and dynamically draw a line concerning who to believe about what; based on the aggregate of what somebody has learned about us, a person could choose to believe John, or me; it's the decisions we each [have to] take.

Specfics: for 18 point, I think the top one needs adjustment for each of the three pairs("ju" a hair tighter, "um" a hair looser, and "mp" a bit tighter), while the bottom one just needs the "um" a hair looser. (BTW, I can't quantify "hair" and "a bit", but I can tell you that the latter is more.)

> You say there is no rhythm, and I say
> this is like saying there is no God.

I don't think so. I think it's more of a terminological confusion caused by the romance of the consciousness (which forgets we're animals). The reason there's no rhythm is quite simple, mechanical even: to me (and I think dictionaries agree) rhythm is a pattern in a flow. But there is no flow in reading (except at the level of linebreaks, but that's far removed from letterform notan), so there is no rhythm. There is Pattern - let's please use that instead, no matter how unromantic it is.

> prefabricated letters

I think this is also a misleading (or at least archaic) term.
Please read my "reply" in Typography Papers 4.

--

BTW, I'm supposed to finish getting ready for my Beirut talk, so if I become silent it's not a slight or a mark of detachment.

hhp


raph
11.Apr.2005 11.41am
raph's picture

On brain hemispheres: here's an accessible yet scientifically grounded article. I'm personally a very unbalanced person; my ability to improvise is extremely weak compared with my logical and analytical reasoning. As such, I have a strong tendency to seek a deep theoretical understanding in areas where many would insist that "if you gotta ask, you'll never know" (Loius Armstrong). Will this imbalance prevent me from making beautiful fonts? Either way, it's my path to follow.

In any case, I stand by my assertion that (good) spacing is hard. If it were easy, then everybody on this thread would be agreeing, and even amateur shareware fonts would be well spaced. The empirical evidence suggests otherwise.

Hrant: no, the "metrics -18" notation refers to the spacing settings; my metrics minus 18 units (of 1000) between each pair. The intended size for that example is "large", but my metrics were very much tuned for 10/12 point setting. I am not claiming that the top line is better for display sizes; the "mp" plainly looks gappy.

Hrant is of course correct in assuming that my metrics aren't based on mechanically making the spaces between the stems equal. Maybe the "j" could use a little more space on the right (if you're Peter or William), maybe a bit less (if you're Hrant). Tracy's guidelines side with the former camp; his 'j' right stroke space is the same as that of 'i'.

Good luck with your Beirut talk! Your snideness is forgiven, just this once anyway.


peter_bain
11.Apr.2005 11.49am
peter_bain's picture

For myself:
top "jump" is better, for text sixes anyway
bottom is useless, either text or display

I'm firmly convinced that at display sizes, difference in personal taste for spacing exists and is unavoidable. This variety is consistent across type composition and hand-made letters, and comes forward in tighter spacing at larger sizes.


peter_bain
11.Apr.2005 11.49am
peter_bain's picture

For myself:
top "jump" is better, for text sixes anyway
bottom is useless, either text or display

I'm firmly convinced that at display sizes, difference in personal taste for spacing exists and is unavoidable. This variety is consistent across type composition and hand-made letters, and comes forward in tighter spacing at larger sizes.


enne_son
11.Apr.2005 11.50am
enne_son's picture

"can't be all feeling,... "
"in particular spacing need[s] to be quite analytical."

"good notan ( [=] balance/tension among the White/Black)
"I squint, move back & forth (like those charmed snakes),
and try to see holes & clots"

(I'd bet we all do the squinting / seeing holes and clots thing.)

So is gauging notan analytical or by feeling?
I think the squinting and moving / seeing holes and clots is the 'analytical' end of your practice, but in doing this you 'feel' tensivities / equivalencies or balance /[and yes] rhythms.

Random house: "a patterned repetition of a motif, formal element, etc., at regular or irregular intervals [pe: can be of space] in the same or a modified form."

I don't see how putting space in the 'um' of 'jump' brings the o.k. version into notan; it just destroys the visual integrity of the wordform by making the 'ju' bond and the 'mp' bond strong and weakening the 'um' bond disproportionately. Your proposals for the metric version have the same effect. Pushing this any farther leads to visual_wordfrom_resolutional response_bias collapse.

William: "the state of theory in reading and typography is not very strong."
Exactly, so let's do what's necessary to strengthen it.


enne_son
11.Apr.2005 11.50am
enne_son's picture

"can't be all feeling,... "
"in particular spacing need[s] to be quite analytical."

"good notan ( [=] balance/tension among the White/Black)
"I squint, move back & forth (like those charmed snakes),
and try to see holes & clots"

(I'd bet we all do the squinting / seeing holes and clots thing.)

So is gauging notan analytical or by feeling?
I think the squinting and moving / seeing holes and clots is the 'analytical' end of your practice, but in doing this you 'feel' tensivities / equivalencies or balance /[and yes] rhythms.

Random house: "a patterned repetition of a motif, formal element, etc., at regular or irregular intervals [pe: can be of space] in the same or a modified form."

I don't see how putting space in the 'um' of 'jump' brings the o.k. version into notan; it just destroys the visual integrity of the wordform by making the 'ju' bond and the 'mp' bond strong and weakening the 'um' bond disproportionately. Your proposals for the metric version have the same effect. Pushing this any farther leads to visual_wordfrom_resolutional response_bias collapse.

William: "the state of theory in reading and typography is not very strong."
Exactly, so let's do what's necessary to strengthen it.


hrant
11.Apr.2005 2.41pm
hrant's picture

> the "metrics -18" notation refers to the
> spacing settings; my metrics minus 18 units

Oh. I figured that was an en-dash. :-) Especially since you didn't state the intended usage size (while I know you know that's important). Tsk tsk tsk... ;-)

> The intended size for that example is "large"

Well, 18 is close to what I would call "large" myself. To me large is anything above 40 (this is based partly on the work of the Bentons, as well as the span of the fovea wrt [typical] viewing distance).

The question (wrt my previous statements) becomes: is a global tracking adjustment adequate for bringing your 10/12 spacing to 18? I think considering the particular forms in "jump", it's probably fine. Which means my statements stand.

> Tracy's guidelines

BTW, I think you're ascribing a degree of accuracy to his guidelines that they can't enjoy - and I don't think Tracy intended them to - he was a very "eye is the final arbiter" guy. Which I agree with to some extent, although I don't see it precluding a higher degree of "method" than what some people [like to] stop at. It's always easier to just eyeball - you just can't reach the pinnacle that way.

--

> So is gauging notan analytical or by feeling?

I'm not sure.
But it's clear we're seeing (in the useful sense of the term) different things... The question reverts again to what [we think] users need/want; and how much we trust the senses/analysis of others versus our own.

> Random house: "a patterned repetition of a
> motif, formal element, etc., at regular or
> irregular intervals [pe: can be of space]
> in the same or a modified form."

I think this is a non-productive definition (assuming your "can be of space" interjection), because it reverts to Pattern again; pattern and rhythm become interchangable. I think it's more productive to restrict rhythm to something that exists in a directed continuity (like time). That way you have two distinct, focused concepts/terms. The problem is our consciousness needs to take a cold shower.

hhp


raph
11.Apr.2005 5.01pm
raph's picture

(hey, I should run a Fourier analysis!)

I see I'm not the first one with this idea. Hrant just now posted a link to someone who's done just that, starting from a page of Aldine italics.

Anyway, here are Fourier transforms of the two 10-point settings above. First, mine, then Adobe optical kerning.

FFT of Century Catalogue, my spacing

FFT of Century Catalogue, Adobe optical kerning

The ladderlike forms sorrounding the vertical line at the center represent the line spacing. The dark splotches to the left and right are the main stroke rhythm. I speculated that the peak would be harper in my version, more spread out in optical kerning. I think that is true, but the effect is very subtle:

histograms of FFT

Interestingly, the peak of the main stem frequency is at a very slightly higher frequency in the optical kerning sample; perhaps that corresponds to Peter's perception of more darkness.

This was interesting, but the differences between the FFT plots are subtle, and not easily accessible to interpretation, so I have yet to be sold on the general usefulness of the technique for understanding spacing.


John Hudson
11.Apr.2005 5.33pm
John Hudson's picture

There is no rhythm in text type. Because there is no flow.

How many times do we have to have this conversation? How many times does it need to be explained to you that visual rhythm does not imply flow? How many times does this have to be demonstrated with diagrams? How many times does it have to be suggested that you are confused by notions of musical rhythm, which is temporal and hence sequential (flow)? How many times does it have to be explained that visual rhythm is not temporal, but immediate? How many times does it have to be explained that rhythm in type design is about the relationship of shapes to each other, and not descriptive of the reading process which we know is saccadic? How much clearer can we make it, than to repeat that the relationship of any shapes in a group can be more or less rhythmic, and that this doesn't imply anything about flow or, indeed, anything about the reading process at all? How often do we need to go over the same ground before it sinks in?


enne_son
11.Apr.2005 5.33pm
enne_son's picture

Raph, what happens with perceptably terrible spacing? I mean, very irregular. Also, what happens with very very tight spacing, and very very loose. That might tell us something about tolerances, wouldn't it?


John Hudson
11.Apr.2005 5.52pm
John Hudson's picture

When other strategies fail, deploy concrete poetry. I call this number 'Got Rhythm', hepcat. Dig it.
Got Rhythm


John Hudson
11.Apr.2005 6.02pm
John Hudson's picture

Raph, what happens with perceptably terrible spacing? I mean, very irregular.

There ain't no such thing as irregular spacing, Peter, 'cause irregular ipso facto and all that implies regular, and regular is rhythmic. And you heard the man, there ain't no rhythm in text type: it's all a 'romantic product of our consciousness' and that ain't cool. Unless, of course, the man is wrong, and all the hepcats know what rhythm just means regular in its arrangements like. And sweet.

[The device employed in this message is known in classical rhetoric as berlowia]


William Berkson
11.Apr.2005 6.12pm
William Berkson's picture

John, your efforts to pursuade Hrant have brightened my day.

They have a snowball's chance in hell of being successful.


William Berkson
11.Apr.2005 6.36pm
William Berkson's picture

Hrant pangram:

The type designer wiz just loves to quickly fix boumas.

Pangram reply:

Others just don't always love the good boumas the wiz quickly fixed up.


hrant
11.Apr.2005 6.46pm
hrant's picture

> How many times do we have to have this conversation?

Dunno.
How many times do I have to try to yank the inhibitor bolt off your head unit? I'm not holding my breath. You have much to loose and little to gain from admitting the truth. And for one thing, could you ever imagine John Hudson abruptly having to admit he was wrong all this time... to Hrant?!

Just keep fabricating and improvising terminology, and chuckle away with your clique, so you can avoid self-doubt at all costs. And to think you see yourself as a terminological purist.

> rhythm in type design is about the
> relationship of shapes to each other

You're creating confusion to cling to chirography. How many times do I have to explain to you why chirography is counter to typography progress? Infinity. The Pope would have a hard time getting you to admit fault - to simply switch to using "pattern". Or just make up a new term! Anything that doesn't suffer from the misguided escapism of "rhythm", with its sickly, senile association with writing by hand. Dodder-headed designers pretending to be of this age.

When you get off the absynth, let me know.
Then I'll explain it all to you one last time.

hhp


pablohoney77
11.Apr.2005 7.29pm
pablohoney77's picture

difference in personal taste for spacing exists and is unavoidable

so Mrs Eaves isn't badly spaced, it's just spaced to a different set of personal preferances. i'll hafta remember to use that when someone tells me MY spacing sucks. ;^D


William Berkson
11.Apr.2005 7.54pm
William Berkson's picture

>difference in personal taste for spacing exists and is unavoidable

Hmmm. Well I may change my mind as I learn more about this, but here is my conclusion so far. There is no ideal spacing because the letters, especially the caps, do not allow for fully meeting a standard of evenness of color or rhythm. For example, LA is a problem.

As Raph points out, there are sometimes conflicting considerations: evenness of stems distance, distance of the nearest parts of the letters, closeness at the top or x height, at the baseline, etc. And, don't forget - as Tracy emphasized - glyphs can be designed to space better or worse also.

So there will always be room for taste. However, this room is only within a certain range. There is still such a thing as bad spacing, as John illustrated in his 'visual persuasion'. So yes, there is good spacing; yes, there is bad spacing; and, no, there is no ideal spacing.

But to move closer to the ideal means designing the glyphs to space well in the design process.


pablohoney77
11.Apr.2005 8.04pm
pablohoney77's picture

LA is a problem.

yet you persist in living there, wassup with that???


William Berkson
11.Apr.2005 8.26pm
William Berkson's picture

No, I'm a Midwest boy and an East Coast old man ;-)


John Hudson
11.Apr.2005 8.50pm
John Hudson's picture

Then I'll explain it all to you one last time.

Actually, why don't you try explaining it once? So far, all you've done is repeated this statement: 'There is no rhythm in text type. Because there is no flow.' So why don't we start at the beginning and you can explain what you mean by 'rhythm' and why you, apparently, think it is inseperable from 'flow'.

I have explained, in detail and with diagrams and with reference to examples (e.g. Mondrian's painting 'Broadway Boogie Woogie'), what I mean by rhythm in a visual context, and why the immediate, non-temporal aspect of visual rhythm does not imply or need flow.

Why don't you do some work and try to explain what you mean instead of hiding behind the prejudice that you don't think I can be convinced. You might be surprised. In any case, I don't go to lengths to explain my thinking to you because I necessarily think you can be persuaded: there are other people involved in and observing our conversations.

If it helps, I'll apologise for being cheeky, but since you have not once engaged with the argument that visual rhythm does not imply flow -- but just keep repeating your statement as if it were beyond critique --, I think a measure of frustration is understandable.


raph
12.Apr.2005 12.02am
raph's picture

Peter: very good question indeed, and here's the answer:

FFT's of various spacing samples

1. my spacing
2. my side bearings but no kerning (metal-like)
3. my spacing -30 units (tight)
4. my spacing +30 units (loose)
5. intentionally bad spacing (freeware!)

The last is especially illuminating, as it strongly suggests that spacing quality is sharply correlated with the sharpness of the peaks in the frequency domain. As expected, tighter spacing moves the peak to higher frequencies, and looser lower.

I don't yet have any explanation for the microstructure in the tightly spaced sample. It's particularly intriguing since it's not mirror-symmetrical.

The soft vertical lines near the center of the loosely spaced FFT represent the alternating pattern of dark letter and light space between letters. Note that one frequency is about the same as the line space, another about double that. The latter should correspond to the individual letter period; the former may be a subharmonic.

I take back what I said about the FFT not being a useful tool for analyzing spacing. The fact that the bad spacing example shows up so strongly as smeared-out peaks also strongly suggests that Chuck Bigelow might have been on to something when he suggested that an automatic kerning algorithm might be based on a spatial frequency domain optimization.


Nick Shinn
12.Apr.2005 5.48am
Nick Shinn's picture

>"rhythm", with its sickly, senile association with writing by hand.

Rhythm is a generic term used when discussing the formal qualities of the arts. Most people find it a useful term, understand what is meant by it, and consider it a pleasing quality. What on earth is sickly and senile about handwriting?

"Text" and "Texture" are both derived from the Latin "tactare" -- to touch. So the idea is well established that there is something in text typography which is not an obvious rhythm (viz. the blurryness of the Fourier images) and not a pattern. It is something which cannot be fixed with the clarity of vision, or described with the precision of a rhythmic tempo, but is better felt.

Colo(u)r and fit are the proper typographic words for what we are discussing as the principle of "spacing". When those from outside the typographic tradition start to analyse it in an objective way, they decide that perfectly servicable words like "leading" are misleading anachronisms, and replace it with "line height".

Why are typophiles talking about "optimizing spacing"?
In typography, spacing means adding to the standard distance between letters or words.

"Optical spacing" is perhaps the culprit, and this is a misnomer -- it should have been more accurately named "Auto kern".

I'm certainly interested in what science has to reveal about reading and typography. But I'm sceptical of how deep and how relevant it can go. Some areas of research produce softer science than others. So far, it's been established that simple principles can be applied to explain some of the phenomenon of reading. For instance, it is has now known that we read by recognizing the letters in words. Gosh.

>Dodder-headed designers pretending to be of this age.

Sorry, I reject your claim that the age belongs to soft- and pseudo-scientists with their facile, half-baked theories.

If someone invents a really good automated kerner, I will accept it as a challenge to invent bizarre new forms of type design which are resistant to such mechanization. In the meantime, the field belongs to craftspeople, not bots.


timd
12.Apr.2005 6.40am
timd's picture

Texture and text are derived from Latin textura


William Berkson
12.Apr.2005 6.52am
William Berkson's picture

The link of Raph to Charles Bigelow's comment is interesting. It says that once URW's auto-kern (much better name, I agree, Nick) was based on the idea of electrostatic repulsion. This would explain why its decendent 'Optical spacing' pushes apart closely touching letters, in situations where designers might not do that.

Also, though I don't understand how the pictures represent periodicity, it does seem from Raph's pictures, and especially from the link that Hrant gave to the Jenson stuff, that periodicity in spacing is important.

Hrant, whether you call it periodicity or rhythm doesn't matter. I don't know what you are all bothered about.

The issue which David Berlow raised, of evenness of color vs regularity of rhythm as goals in design makes sense to me. Both are probably desirable, but could come into conflict. Also they are both in tension with legibility, which requires diversity of form.

I don't have a grip on how to balance these conflicting things, other than by just looking at the results, but I'm interested to learn anybody's insights into these different factors.


enne_son
12.Apr.2005 6.59am
enne_son's picture

"it's been established that [...] we read by recognizing the letters in words."

Nick, my Typo essay was an attempt to 'destabilize' (or as John Hudson said, 'subvert') this impression. Perhaps it didn't do this after all.

Raph, see my Typo contribution's note #25 for some earlier intuitions about Fourier_Transform_style analysis.
I think your transforms are very instructive. I think your 'tight' and 'loose' are not extreme enough to show strong effects. This and the strong smearing in 5 indicates to me that spacing tolerences are somewhat generous before things break down on an optical-grammatical level; while differences on the gestural-atmospheric level are quite readily felt. (Gestural-atmospheric differences might be beyond the resolution power of Fourier Transforms, or hide in in higher frequency) (The optical-grammatical level is the domain of perceptual processing, the gestural-atmospheric is the domain, on my proposed scheme, of typographical aesthetics.)
It might be interesting to plot at what point in tracking or badifying examples the Fourier spectrum starts to change more dramatically than at the small tracking settings (and what the resulting curve looks like). This again might say something about tolerences. This could than be compared with eye-movement statistics and reading speed statistics.
To my mind this type of analysis is especially relevant to 1) 'ensembles statistics' assembly-facilitation at the parafoveal pre-(or co-)processing / parafoveal preview level; and 2) the lateral_intergration_routines facilitation at the V2 level of the visual cortex. This is the level at which, on my sense of it, letter recognition and wordform resolution tasks diverge.

I suspect there is a scientific paper in all of this. When I wrote my Thessaloniki / Typo text I was anticipating that Fourier Transform studies of single letters vis


Nick Shinn
12.Apr.2005 7.50am
Nick Shinn's picture

>Texture and text are derived from Latin textura

Right. My Latin teacher must be spinning in his grave.
Textile sounding like tactile must be a coincidence.

>my Typo essay was an attempt to 'destabilize'

You should conduct you own experiments, with typographically varying text. Not just U&lc vs caps, but parameters such as tracking, kerning, type style, leading, x-height, etc.

The axiom that typographic variables have no bearing on the science of reading (just a cultural gloss) needs to be challenged in the lab.


William Berkson
12.Apr.2005 7.53am
William Berkson's picture

>we read by recognizing the letters in words.... my Typo essay was an attempt to 'destabilize' (or as John Hudson said, 'subvert') this impression. Perhaps it didn't do this after all.

This is maybe a bit off topic, but as I wrote in the Typo 13 thread, the main issue between you and Kevin on the recognition of individual letters seemed to be whether there is a letter-assembly stage in the brains of accomplished readers. When I brought up the ease of reading scrambled-letter words as a counter-example to your theory, you said we do slow down, which is true. But the question is by how much, and under what circumstances. If you made your theory precise enough to predict the slow down by how much and in what circumstances, and also derived conflicting predictions from the 'assembly model', then you could have a crucial experiment. That would be huge in swaying everyone for or against that aspect of your theories.


enne_son
12.Apr.2005 9.07am
enne_son's picture

"The axiom that typographic variables have no bearing on the science of reading (just a cultural gloss) needs to be challenged in the lab."

Nick, how is this different from what I claim? See my subtitle: "...or why strategic construction, a well-motivated contrast scheme and 'space craft' still matter." Then turn to the bolded section on page 26. Did my responses to Raph's Fourier spectrum postings tell you otherwise? They shouldn't have.

William and Nick, I would love to be part of a team of collaborators, follow a course of actions like the ones you suggest, devise and conduct telling experiments. Perhaps the burden of proof lies on me, but as I have neither the training or the infrastructure, I need to rely on making a typographically tuned model of reading compelling enough in cognitive scientific terms to induce those who do have the approriate training and infrastructure to take it up.


Nick Shinn
12.Apr.2005 11.00am
Nick Shinn's picture

>Nick, how is this different from what I claim?

It's not. I was agreeing with you.

>I have neither the training or the infrastructure,

When you're putting together your proposal for a research project, bear in mind that you don't have to do everything yourself. If the project requires multiple skills, sub-contract those which you don't have. Rack up your funding.


enne_son
12.Apr.2005 12.25pm
enne_son's picture

William, to follow up on your post 978 about the ease of reading scrambled-letter words:

I would assume that there is a letter assembly stage in the reading of these words. So I would be interested in seeing if the eye movements generated by encountering such words resemble those generated by a normal reader encountering unfamiliar words or a dislexic reader encountering words pure and simple. I would also want to establish if there is a preview benefit generated by the fact that the scramblings usually relate to internal letters fairly close to each other on similars / modulars (Hrant) / perceptual distance (Herman Bouma) scales. Next I would want to look at fMRI readouts to see if there is normal activation in the left fusiform gyrus (the Visual Word Form Area). I might be able to 'predict' then whether the time course resembles the time course for recognition in persons with dislexia, or persons learning to read.
But this would then not be a critical experiment. It would just mean my model is sufficiently subtle to accommodate these special cases.


enne_son
13.Apr.2005 6.43am
enne_son's picture

Raph, it might be informative to check your sidebearings by applying Fourier transforms to individual glyphs using different sidebearing settings and then comparing individual glyph Fourier statistics across the font.
My thinking is this: imagine a lead sort; the relation of the black to white (within and around) on each sort within a font has to be the same for every character, or so it seems. (I don't know though if the results will be made incommensurate by fact that, withing a single font, all sorts


enne_son
13.Apr.2005 7.36am
enne_son's picture

Hrant, would you expect Fourier transforms (like on http://www.malgil.com/esl/aldus-fft/) of 'chirographic-typographic' settings of pages, lines of type, or individual boumas to differ significantly from your hoped for 'notanic-typographic' setting of pages, lines of type, or individual boumas?


dana
13.Apr.2005 11.30am
dana's picture

I think that you all have misunderstood the intent of this thread


enne_son
13.Apr.2005 2.33pm
enne_son's picture

Dana, those look like highly developed fourier transforms to me. What kind of text did you make them from? Talk about subliminal seduction!


John Hudson
13.Apr.2005 3.29pm
John Hudson's picture

You know, a funny thing happens if you apply a Fourier transform to Dana's spacecraft...
It go  B O U M (A) !


enne_son
13.Apr.2005 4.19pm
enne_son's picture

So ends another thread?


John Hudson
13.Apr.2005 5.09pm
John Hudson's picture

Reversed Fourier


Nick Shinn
14.Apr.2005 12.56am
Nick Shinn's picture

Dude gets the Princess!


billtroop
14.Apr.2005 12.37pm
billtroop's picture

>So ends another thread?

Well, all it could say towards the end
was 'Ahhhh' and 'Wahhhhh'.


Aaron Sittig
14.Apr.2005 4.35pm
Aaron Sittig's picture

To return to the topic, and somewhat to Raph's initial post, I'm in the middle of spacing a design and after printing a test page of text in TextEdit on OS X, I thought I was hallucinating wider tracking on the smallest point text sample. But after blowing up a pdf of the page, it's clear that Apple's text engine automatically increases the tracking on type at small sizes. I'm confused, as a type designer, if this is a good thing. It might help naive users get a better looking page, but it makes it difficult for a designer like me to get the right spacing on my type. Even if I use a type designed for small sizes with the spacing already loosened, Apple's text engine will still increase the tracking. Thoughts?

Blown up PDF of changed tracking


billtroop
14.Apr.2005 6.28pm
billtroop's picture

Why are you using TextEdit to print font samples?


Aaron Sittig
14.Apr.2005 6.38pm
Aaron Sittig's picture

> Why are you using TextEdit to print font samples?

Because it's quick and dirty. I have to restart InDesign to get it to load a new build of my font, but TextEdit will load the new font and even reflow text when I drop the new build in the Fonts folder.

I'm digging around more and it looks like TextEdit isn't loosening the tracking intentionally. It looks more like there's imprecision in how it lays out the type and the imprecision is especially bad a 10pt. So I guess my post should serve as a heads up instead, in case others hadn't realized (like I hadn't) that TextEdit mangles spacing so badly.


billtroop
14.Apr.2005 9.44pm
billtroop's picture

It seems to me you ought to be using where people have a rough idea how it works - like the Fog printouts, or Quark. I have never before heard of anyone trying to do font proofing in TextEdit.


Aaron Sittig
15.Apr.2005 10.57am
Aaron Sittig's picture

Fog? Quark? What's that?


Nick Shinn
15.Apr.2005 11.24am
Nick Shinn's picture

>I have to restart InDesign to get it to load a new build of my font,

I don't have that problem.
I'm using InD CS and the Users>Nick>Library>Fonts folder.


Thomas Phinney
15.Apr.2005 11.33am
Thomas Phinney's picture

Personally, I usually deactivate the old version of the font, return to InDesign to make sure it knows the font is gone, then install/activate the new version. This seems to make sure that InDesign doesn't cache the old font info.

Your mileage may vary, of course.

T


billtroop
15.Apr.2005 12.05pm
billtroop's picture

>Fog? Quark? What's that?

Oh, just things that people like Matthew Carter use. You probably should, too.

>I usually deactivate the old version of the font, return to InDesign

That should work with any program. It is certainly the way people tend to work with Quark, with predictable results. BUT ...

>This seems to make sure that InDesign doesn't cache the old font info. Your mileage may vary, of course.

_Seems_ ... _may vary_ ... these aren't things anyone should be worrying about. If even TP doesn't know for sure what InDesign is doing, why on earth would a font designer use it for proofing?

The thing is, we _know_ what Quark does when it comes to proofing type. This has been established pretty well. I would like to say we know what Fog does, but I don't think we do, as I don't think its print preview honours hinting, or if it does so, does it eccentrically.

One thing I always do on any font in the editing stages is to set the PS IS to 0, which should prevent the printer from caching it.

It is also essential to consider that different printer rasterizers will print font data differently. For example, I have noticed in the past that it is tendency of an Adobe rasterizer to prevent dropout at any cost; clone rasterizers are not necessarily designed with this imperative, and may thus give a more useful indication of problem areas in a design. Adobe rasterizers ought to be the gold standard, of course, but in these competitive days, they are seldom used, for cost reasons. I have no idea the extent to which the latest clones have achieved parity or functional identity with Adobe PS.


Joe Pemberton
6.May.2005 11.33pm
Joe Pemberton's picture

Now do you see why I thought you’d like the wiki? A lot of the nuggets in this thread should be ported wholesale into the wiki for reference.


enne_son
11.May.2005 8.44am
enne_son's picture

To follow up on Raph’s comment about the general usefulness of fourier processing for understanding spacing, see the attached (sorry, couldn’d figure out how to attache in the new interface: try http://www.thecharlestaylorprize.ca/downloads/raph_spacing_protocols.pdf) comparison of a transform of Raph’s custom spacing with a transform of the kernus spacing and a transform of the ikern spacing. I did some gaussian blur and thresholding processing to highlight the differences. (There is a small margian for incompatibility introduced by manually adjusting the darkpoint and midpoint levels after the gaussian blur.)

The interesting thing to note is that, unlike kernus, ikern keeps the general concentration of information visible in Raph’s spacing (note the similarity in the 75%grey horizonatal band), but spreads out the very highest peak (the white peak in the manin frequency band disappears).

For those who are interested, I’ve prepared an entire suite of fourier transforms. One is designed to compare the spatial frequency distribution of a suite of fonts, ranging from bold to light, normal to condensed, serif to sanserif. Another shows the effects of course spacing adjustments to Mendoza (using QuarkXpress tracking units on the ±10 order. Another shows the effects of fine spacing adjustments on the order of ±1 (through 9) qxp tracking units. Another compares the spatial frequency distribution of the black in a block of text with that of the white.

Those who are interested in accessing this should send me an e-mail request (penneson@sympatico.ca), and I will send them a link. (I prefer to know who is downloading this, because I might want to extend these exercises and make it into a presentation.)

I will hold off on applying my interpretations of the tracking experiments, font comparison, black versus white experiments for now.


Stefan Seifert
21.Jun.2007 11.06pm
Stefan Seifert's picture

Hi enne_son!
Hi Raph (again)!

As I am new at typophile I don’t really wether it makes sense to respond on discussions that were made years ago and wether anyone may take notice of it. Yet, I surfed a little in these old comments and I am again astonished that there are so much people thinking about stuff like this, I mean almost in terms of philosophy and so on. So I did always.
As I already told here and there I worked long ago at the Valdonega project and since then I have learned to have great respect what was done in the past in my example the Monotype faces.
And I do believe that existes this “atmospheric” thing you talked about.
I once tried to better a Baskerville Monotype drawn very closely to the metal original.
Without kerning (I think it spoils the rythm of characters) but I simply “bettered” the spaces of letters and up with:
Go to the start again keeping Monotype spaces because they added so much to the very character of the font.
My tries to better it were more even thats true but at the same time liveless and boring.
So I think there are some secrets about it.
Anyone there who wants to restart this discussion?

Salute
Stefan


hrant
21.Jun.2007 11.30pm
hrant's picture

Stefan, 2 years is nothing around here! :-)
Feel free to go back as far as you’d like.

hhp


William Berkson
22.Jun.2007 6.24am
William Berkson's picture

That’s an interesting question you raise about Monotype.

The current received wisdom seems to come from Walter Tracy’s book ’Letters of Credit’ and other influences from the old metal Linotype drawing offices.

Monotype’s practices seem to have been somewhat different. Does anyone know about the approach of the drawing office in English Monotype’s old metal days?


hrant
22.Jun.2007 8.14am
hrant's picture

A lot of this sort of thing has to do with the physical limitations of metal,
especially “hotmetal” (Monotype, Linotype, etc.) as opposed to foundry.

hhp


Stefan Seifert
22.Jun.2007 12.43pm
Stefan Seifert's picture

>Stefan, 2 years is nothing around here! :-)
>Feel free to go back as far as you’d like.

Thanks guys!

>A lot of this sort of thing has to do with the physical limitations of metal,
>especially “hotmetal” (Monotype, Linotype, etc.) as opposed to foundry.

Yes I do also believe it had to do something with restrictions in the Monotype machines because there was only a certain number of widths possible I think. Yet, as I said its not so easy to make it better. For example the e’s shifted slightly to the right side are genious solutions and have a certain logic to the eye. If you cut those particularities out of those fonts they get kind of strange and boring without their special rythm (happened so