Conversion errors for some .tif files with versions higher than 6.9.12-77

[xImMoRtALitY99]

ImageMagick version

6.9.12-78

Operating system

Linux

Operating system, version and so on

Debian 11.7

Description

Converting a .tif file to a .jpeg file works successfully with ImageMagick 6.9.12-77, but looks incorrect with versions ImageMagick 6.9.12-78 and higher. The convert command runs successfully, but from version 6.9.12-78 the result looks much worse, as if there were problems with the conversion.

Steps to Reproduce

If you use the image original.tif from the images.zip attachment, the conversion error should occur.

Version 6.9.12-77:
convert --version

Version: ImageMagick 6.9.12-77 Q16 x86_64 c8a10ad:20230211 https://legacy.imagemagick.org
Copyright: (C) 1999 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP(4.5)
Delegates (built-in): bzlib freetype jbig jng jpeg lcms ltdl lzma png tiff webp xml zlib

convert -verbose original.tif 77.jpeg

original.tif TIFF 1063x1063 1063x1063+0+0 8-bit ColorSeparation CMYK 1.29019MiB 0.090u 0:00.066
original.tif=>77.jpeg TIFF 1063x1063 1063x1063+0+0 8-bit ColorSeparation CMYK 785193B 0.050u 0:00.054

Version 6.9.12-78 and higher:
convert --version

Version: ImageMagick 6.9.12-78 Q16 x86_64 999ee5b:20230307 https://legacy.imagemagick.org
Copyright: (C) 1999 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP(4.5)
Delegates (built-in): bzlib freetype jbig jng jpeg lcms ltdl lzma png tiff webp xml zlib

convert -verbose original.tif 78.jpeg

original.tif TIFF 1063x1063 1063x1063+0+0 8-bit ColorSeparation CMYK 1.29019MiB 0.070u 0:00.064
original.tif=>78.jpeg TIFF 1063x1063 1063x1063+0+0 8-bit ColorSeparation CMYK 926801B 0.060u 0:00.061

Images

images.zip

[dlemstra]

Looks like an issue in IM6, getting the correct output in IM7.

[urban-warrior]

Thanks for the problem report. We can reproduce the issue and will have a patch to fix it in the GIT main branch @ https://github.com/ImageMagick/ImageMagick later today. The patch will be available in the beta releases of ImageMagick @ https://imagemagick.org/archive/beta/ by sometime tomorrow.