I'm not sure this is a bug but it's not proper behavior.
On converting image to 256-colors grayscale (and saving to PCX) ImageMagic creates file with randomly shifted palette.
For example: 0 - RGB(100,100,100), 1 - RGB(101,102,103), ...155 - RGB(255,255,255), 156 - RGB(0,0,0), ... 254 - RGB(98,98,98), 255 - RGB(99,99,99)
Shift could be different for each file.
We need to convert our images into (PCX) files with fixed uniform 256-colors grayscale palette:
0 - RGB(0,0,0), 1 - RGB(1,1,1), ... 254 - RGB(254,254,254), 255 - RGB(255,255,255)
How it could be achived with using of ImageMagic?
Preferably combined with no-RLE compression in PCX file.
It looks similar to this one: http://studio.imagemagick.org/pipermail ... 15683.html