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Old 03-18-2012, 03:06 AM   #8
AlexBell
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Posts: 2,228
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Join Date: May 2008
Location: Launceston, Tasmania
Device: Kindle3, iPad2, Kobo Touch, Sony PRS T3, Nexus 7
Quote:
Originally Posted by SBT View Post
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)
Thanks, SBT. That's an interesting suggestion. I'll have a look at Imagemagick.
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