Preben Soeberg wrote:
So next I tried to use the precision flag -p in cctiff, and this gave huge changes in the calculated gamut volumes, but only when the camera profile was involved.
Strange. Did you compare the tiffs visually? what says cctiff -k? can you send me the camera profile?
I found that the volume differences are negligible (<0.02%) with ISOcoated_v2:
timage -t -r300 -x t300.tif cctiff -p -ir sRGB.icc -ir ic2.icc t300.tif t300_p_int.tif cctiff -ir sRGB.icc -ir ic2.icc t300.tif t300_fast_int.tif cctiff -k -ir sRGB.icc -ir ic2.icc t300.tif t300_p_test.tif Worst error = 3445 bits, average error = 41.128641 bits Worst error = 5.256733%, average error = 0.062758% tiffgamut_vol -v -ir ic2.icc t300_p_int.tif | grep volume Total volume of gamut is 397418.506559 cubic colorspace units tiffgamut_vol -v -ir ic2.icc t300_fast_int.tif | grep volume Total volume of gamut is 397358.358854 cubic colorspace units echo "scale=10; 397418.506559/397358.358854*100-100" | bc -l .0151368900 Klaus