Klaus Karcher wrote:
and "tiffgamut_vol -v -ir ... timage_t_200_sRGB_inters_iC2_r.tif" returned: "Total volume of gamut is 398107.430337 cubic colorspace units"there's indeed a considerable difference (>5%) to qhull's result:qhull s FA <timage_t_200_sRGB_inters_iC2_r.points [...] Total volume: 421367.74
so much for "impressive precission" ;-)
There are differences between how Argyll and qhull computes a gamut surface. qhull will compute a convex hull using all the given surface points. Argyll will first filter the surface points using a "segmented maxima" type algorithm, and then computes a convex hull in a space that allows some degree of convexity in the surface. Graeme Gill.
