Unable to do PDF comparison

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Re: Unable to do PDF comparison

Post by snibgo »

For the use of "null:", see http://www.imagemagick.org/script/comma ... php#layers , method "composite".

When you have a difference image that is black where there is no difference, you can process that image, eg "-auto-level", or "-fill white +opaque black" to turn all non-black into white.
snibgo's IM pages: im.snibgo.com
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