2009/11/9 Klaus Karcher <lists@xxxxxxxxxxxxxxxxx>: > Martin Weberg wrote: >> >> I did the following conversions. No tiffgamut used. >> >> 1. collink -G -ip -cmt -dpp ProPhoto.icm ISOcoated_v2_eci.icc devlink.icc >> 2. In Photoshop I converted Bill Atkinson's Lab Test Page to >> ProPhotoRGB colour space. >> 3. Then, conversion cctiff -ip ProPhoto.icm -ip ISOcoated_v2_eci.icc >> rgbinfile.tif cmykoutfile.tif >> 4. and cctiff devlink.icc rgbinfile.tif cmykoutfile.tif >> >> The whole image from step 4 is really desaturated compared to 3. > > That's consequential. In step 1 you create a gamut mapping that compresses > the whole, huge ProPhoto space into ISOcoated_v2. In step 3 you use the > precalculated gamut mapping of ISOcoated_v2 to compress a much smaller gamut > (AFAIK something like the Pointer space) to ISOcoated_v2. Step 3 gives you > more saturation, but clips everything outside the Pointer space. True, true... So, I used tiffgam on the whole image. 1. tiffgamut -pj -cmt ProPhoto.icm rgbinfile.tif 2. collink -Grgbinfile.gam -ip -cmt -dpp ProPhoto.icm ISOcoated_v2_eci.icc devlink.icc 3. cctiff devlink.icc rgbinfile.tif cmykoutfile.tif Now, the image is much better, but I still lack red/orange. Martin Weberg