Quote:
Originally Posted by FrustratedReader
You can use a "best" colour image for covers on the websites listing books. Often anyway a good mono image is automatic with a good colour image, if the mono is poor it suggests the shadows, highlights and general contrast is poor in the colour version.
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I haven't actually had much problem with covers, I think the publishers tend to make covers high-contrast anyway so they stand out in the bookshop (at least, they would if every other book in the shop didn't also have a high-contrast cover.)
But there is some interior artwork that looks nice in colour but is fairly low-contrast, or just uses colours which don't look right when translated to greyscale by the usual algorithms. They are not poor-quality scans, I think it is how the artist intended them to look, just that they were never intended to be viewed in greyscale.
Anyway I think I have a solution: Since the colour-capability of a device doesn't change, I could make the colour images the default and use Calibre's kobo_extra.css method to override the default when sending books to a device that doesn't support colour.