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Old 28th Jun 2012, 10:20 am   #21
julie_m
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Join Date: May 2008
Location: Derby, UK.
Posts: 7,416
Default Re: Digital hard copy?

My own experiments with digital photography suggested that my eyes (*) could distinguish up to 4 pixels per millimetre when I was in my late 20s. So that's 16 bits per mm˛. On a sheet of A4 paper (210 x 297 mm.) with a 10 mm. margin all around (190 x 277; 52 630 mm˛) there would be room for 842 080 pixels. That's 105 260 bytes, with no error-correction. If, however, we used red, yellow and blue inks, giving 8 distinct states, we could actually treble the information density.

(* I am short-sighted, which is roughly equivalent to looking at the world through convex lenses; your resolving power may vary.)
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