Post any defects you find in the released or beta versions of the ImageMagick software here. Include the ImageMagick version, OS, and any command-line required to reproduce the problem. Got a patch for a bug? Post it here.
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"-compose CopyBlack" inverts the black level. Test case:
Code: Select all
magick rose: -colorspace CMYK ( +clone ) -compose CopyBlack -composite -colorspace sRGB copyblk.png
Tested with IM v7.0.7-28 on Windows 8.1.
It seems to be a bug in composite.c. See thread https://www.imagemagick.org/discourse-s ... =1&t=10322