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Reading Berkson's article on his Caslon Text over at ILT, I came across this fascinating image.
"Here the white bands show the frequency of the black running across the page, with the distance between the whites I believe being about the width of the n. (Thanks to Peter Enneson for the graphic.)"
Apparently this was generated from a font using Fourier transforms, but I can't seem to find much about exactly how this was done. I have been interested in images that convey information about type faces in an abstract and non-text way for some time now.