Page 1 of 1
Posted: 2006-10-12T13:33:43-07:00
by magick
For proper conversion of RGB to CMYK you need two color profiles: typically sRGB and a SWOP:
- convert image.jpg -profile sRGB.icc -profile SWOP.icm image.tif
Posted: 2006-10-13T10:42:40-07:00
by magick
The conversion only occurs if you have the LCMS delegate library. Type
and ensure -llcms is part of the LIBS value.
Posted: 2006-10-13T12:59:40-07:00
by magick
To properly convert CMYK to RGB or RGB to CMYK you need proper color profiles which in turn requires that ImageMagick be built with LCMS. When you configure ImageMagick from source check the last few lines of the output to ensure LCMS was found. If not, check config.log for the reason why LCMS failed to validate. ImageMagick does have a built-in conversion for CMYK to RGB and back but it a linear algorithm and does not produce very good results.