How to use ImageMagick to batch desaturate images?

Posted by Zando on Stack Overflow See other posts from Stack Overflow or by Zando
Published on 2010-04-16T18:31:23Z Indexed on 2010/04/16 18:33 UTC
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Filed under:

imagemagick

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ruby

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rmagick

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image-processing

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image-manipulation

I have an image that is black text with some gray and pale yellowish background. I basically want to keep the text as black as possible, and make the gray and yellow comparatively lighter...at the very least, turn yellow into a light gray. What's the most efficient way to do that in ImageMagick?

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