GraphicsMagick processes options in the order left to right.
GraphicsMagick uses -depth to control the color quantum precision and
not the storage depth and this option is losing the colormap. It is
likely best convert to grayscale before quantizing the colors.
This works with GraphicsMagick
Package: graphicsmagick
Version: 1.3.20-3
Severity: normal
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I'm using gm for heavy work with tiff-files. Unfortunately I have to use
ImageMagick to convert to 4 bit grayscale tifs. Use the attached testfile for
reference:
% gm convert -compress LZW
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