how to count unique colors in image ?

Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
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fmw42
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Re: how to count unique colors in image ?

Post by fmw42 »

Just a note to add to snibgo's excellent suggestion. Be aware that some of these %[xxx] string formats are relatively new and may not work on very old versions of IM 6. %[opaque] however goes back to 6.6.8-9. So should work on most versions of Imagemagick.
Alexvb6
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Re: how to count unique colors in image ?

Post by Alexvb6 »

I'm astonished these %[xxx] string formats cannot work correctly with IM v7.0.7-28
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fmw42
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Re: how to count unique colors in image ?

Post by fmw42 »

They generally work fine for me. But there has been a bug report about a few not working correctly and that is being corrected for the next IM release.
Alexvb6
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Re: how to count unique colors in image ?

Post by Alexvb6 »

Very Useful Snibgo, and %[opaque] is recognized by IM 7.0.7-28 :)
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