For 8-bit grayscale use -colorspace gray -depth 8 For fewer grayshades add to the above -colors XX
For 2-bit b/w use any of the following: -threshold XX% -monochrome -type bilevel -colors 2 -colorspace gray (possibly add -type bilevel) see http://www.imagemagick.org/script/command-line-options.php http://www.imagemagick.org/Usage/quantize/#two_color I also have several automatic thresholding scripts at http://www.fmwconcepts.com/imagemagick/index.php >Thank You for these hints. >It worked fine on my Linux. I only have the problem, that the output files >are quite large. I found the same problem with convert, where all the files >are in 64bit color depth. Even if I give the parameter -depth 4 the files >are smaller, but 32 bit. > >Can you give me a hint, how I can get at least 8 bit (256 grayscale) or >better 2-4 bit (black white)? _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
