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Old 03-17-2012, 06:16 AM   #7
SBT
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Posts: 501
Karma: 560981
Join Date: Sep 2010
Location: Norway
Device: prs-t1, phone/Cool Reader, tablet/BlueFire, Nook Simple
Nice work.
I've fiddled a bit with b&w print illustrations in ebooks; I like to get the background white instead of the light grey that the original scans normally have. I use Imagemagick, so I can do batch operations on all images at once, get fairly decent results. If you run the images through
Code:
convert file.png -level 20%,85% new-file.png
you get a white background and clearer black lines. You can also sharpen the images a bit, if you like:
Code:
convert file.png -level 20%,85% -unsharp 0.7x0.7+3+0 new-file.png
(That's the parameters I found worked for the images in this book)
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