Bug#766104: [graphicsmagick] converting tiff to 4 bit grayscale doesn't work

2014-10-20 Thread Markus Grunwald
Package: graphicsmagick Version: 1.3.20-3 Severity: normal --- Please enter the report below this line. --- 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

Bug#766104: [graphicsmagick] converting tiff to 4 bit grayscale doesn't work

2014-10-20 Thread Bob Friesenhahn
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