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ImageMagick┬«, version 6.2.5, is a free software suite to create, edit, and compose bitmap images. It can read, convert and write images in a large variety of formats. Images can be cropped, colors can be changed, various effects can be applied, images can be rotated and combined, and text, lines, polygons, ellipses and B├ęzier curves can be added to images and stretched and rotated.

ImageMagick is free software: it is delivered with full source code and can be freely used, copied, modified and distributed. Its license is compatible with the GPL. It runs on all major operating systems.



convert -size 800x600 Big.jpg -resize 100 small.jpg 

for file in *.jpg; do convert -size 1024 $file -resize 300 sm-$file; done

Animated GIFsEdit

convert -delay 20 frame*.jpg animation.gif


In Debian: apt-get install imagemagick

Windows: Installing Imagemagick on Windows