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Old 06-25-2012, 05:03 AM   #7
SBT
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Posts: 580
Karma: 810184
Join Date: Sep 2010
Location: Norway
Device: prs-t1, tablet, Nook Simple, assorted kindles, iPad
Unless the size of the epub file becomes unpleasantly large, I format the images for a 1200x1800, and then in the css file I give the individual image width as a percentage. Then the images are shown correctly whatever the resolution of the device.
If the epub file becomes too large, I reduces the image file sizes by:
  • Reducing the dimensions.
  • Reducing jpeg quality. For old photos and similar, 65% quality is sufficient.
  • Reduce number of colours in png drawings. For black and white illustrations, 16 grayscale levels are sufficient
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