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bignimbus/imagemagick-convert.sh

Last active April 24, 2020 21:03
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Here are some of my pet ImageMagick commands.
Raw
imagemagick-convert.sh
# converts a png image to jpeg
# all transparent regions will be converted to white
convert -flatten source.png destination.jpg
Raw
imagemagick-magic.sh
# optimize an image asset
# no visible quality loss with a vastly reduced file size
# tested with png and jpeg assets
mogrify -filter Triangle -define filter:support=2 -unsharp 0.25x0.08+8.3+0.045 -dither None -posterize 136 -quality 82 -define jpeg:fancy-upsampling=off -define png:compression-filter=5 -define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude-chunk=all -interlace none -colorspace sRGB ./path/to/img.jpg
Raw
imagemagick-no-posterize.sh
# same as imagemagick-magic.sh but with no posterize filter
mogrify -filter Triangle -define filter:support=2 -unsharp 0.25x0.08+8.3+0.045 -dither None -quality 82 -define jpeg:fancy-upsampling=off -define png:compression-filter=5 -define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude-chunk=all -interlace none -colorspace sRGB ./path/to/img.jpg
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