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Given that a epub file must be less than 20MB (in the P. Clark Library, at least), how should one prioritize for image-rich books? Image size, jpeg quality, or colour depth?
Personally, I reduce colour depth for prints and b/w sketches, and quality for photos, paintings and coloured sketches. However, I'm more unsure about what dimensions to use. I tend towards a width of 800 px as default.
And how much priority should I give to minimizing the file size, versus keeping the images nice for my future retina-display e-reader?
Finally, what about prints and similar where moiree patterns are an issue; should I make the images no wider than 600px, so that they seldom will be downscaled, or should future-proof big images have priority?
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