Gamut Boundary: PM5 vs MP

Viewed with CTP3

Have you ever try to take a closer look of the device gamut boundary with ColorThink3? Wonder why the gamut boundary near L=0 for device profile generated with PM5 is so unstructured. With appropriate setting, the similar gamut boundary can be shown with Gamutvision.

Profile Graphing by ColorThink3  Myth 26
In CT3, gamut is plotted with AtoB transformation which is used normally for soft proofing, as oppose to some other graphers that employ "round-trip" transformation. Nevertheless, the calculated gamut volumes or overall gamut displayed do not deviate significantly for either methods used.

Refer to above plot, the center (vertex) of the white point is L=100 (not L=0, viewed from bottom to top). In general , the boundary vectors for MP is smooth and well distributed but that is not so for PM5.

All above illustrations have one thing in common, that they were all derived from the same set of measurement data.