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I have about 4000 images that need to be cropped. The task is rather simple really. They all have a white border that varies but is always between say 20 and 50 pixels. I want to use graphics magick to remove that white border from all the images. How?

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closed as off topic by paulmorriss, Su', John Conde♦ Sep 27 '12 at 1:12

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3 Answers

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The GraphicsMagick -trim operator here. Does what I need. Thanks for the other suggestions.

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You could write a php script that crops all of the images.

http://php.net/manual/en/function.imagecopyresampled.php

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This suffers the same issue as the above (only crops fixed sized borders). – unixman83 Apr 26 '12 at 15:10
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You can batch crop & resize images with the free IrfanView tool

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Unfortunately the borders on the images vary. I can't tell IfranView to just crop all images by 20 px on each side. That would crop some of the content of some of my images. – unixman83 Apr 26 '12 at 15:08

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