Legacy ImageMagick Discussions Archive

Hello!

Amazon's Kindle can show pictures. However, storing the full-color ones on it is wasteful, because it only has a black-and-white screen.

What options should I give to convert to get "optimal" JPGs or PNGs: 600x800, with 16 shades of gray -- and otherwise follow these recommendations?

Thank you!

try something like one of these:

convert image.tif -strip -colorspace gray -resize "600x800>" -depth 8 -colors 16 +dither \
-type palette -quality 75 image.jpg

convert image.tif -strip -colorspace gray -resize "600x800>" -depth 4 \
-type palette image.gif

convert image.tif -strip -colorspace gray -resize "600x800>" -depth 4 \
-type palette image.png


With the jpg, you can control the quality setting to adjust the filesize

see the various options above at:

http://www.imagemagick.org/script/comma ... ptions.php
http://www.imagemagick.org/script/comma ... p#geometry