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Imagemagick to trim whitespace?

Hi - does anyone know if it's possible to crop whitespace regions from
around the edges of an image using Imagemagick? I have a whole bunch of
signature images (as in, people's handwritten signatures) and I'd like
to crop them so that there's no whitespace margin around them. I can do
the cropping fine, it's just detecting the color regions.

Jan 3 '07 #1
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