Legacy ImageMagick Discussions Archive

IM 6.7.8.7 Q16

The following round trip from RGB to HSL/HSB and back to RGB is failing for IM 6.7.8.7, but works for IM 6.7.6.10 and IM 6.7.4.10

I tried both wasy (with and without making the input image linear color or leaving it non-linear color. The result of both is a grayscale image and not the original color image. The miff image layers look fine. So I believe it is with the recombination, perhaps the -compose R/B/B.


Input:



Processing with IM 6.7.8.7


convert monet3.jpg -colorspace HSL -separate 1tmp.miff
convert 1tmp.miff[0] -colorspace HSL \
1tmp.miff[0] -compose CopyRed -composite \
1tmp.miff[1] -compose CopyGreen -composite \
1tmp.miff[2] -compose CopyBlue -composite \
-colorspace sRGB monet3_HSL_rt.jpg



convert monet3.jpg -set colorspace RGB -colorspace HSL -separate 2tmp.miff
convert 2tmp.miff[0] -colorspace HSL \
2tmp.miff[0] -compose CopyRed -composite \
2tmp.miff[1] -compose CopyGreen -composite \
2tmp.miff[2] -compose CopyBlue -composite \
-colorspace RGB monet3_HSL_rt2.jpg


Is this a bug, or am I misunderstanding something here. It does work fine for IM before 6.7.7.8

Further information. This does not fail in IM 6.7.8.6 or in IM 6.7.8.7 with HDRI. It only fails in 6.7.8.7 non-hdri

We can reproduce the problem you reported and have a patch in ImageMagick 6.7.8-8 Beta by sometime tomorrow. Thanks.

magick wrote:We can reproduce the problem you reported and have a patch in ImageMagick 6.7.8-8 Beta by sometime tomorrow. Thanks.

This appears to be fixed in the latest 6.7.8-8 beta, today.