J. Eur. Opt. Society-Rapid Publ. 21, 36( 2025) 55
Figure 3. Images used for the subjective IQA.
in the original image to the available gamut. Some gamut being highly restricted, this gamut mapping algorithm contains a gray axis alignment [ 8 ], as well as a color adaptation step [ 4 ], which distinguishes it from conventional gamut mapping algorithms, such as CARISMA [ 11 ], GCUSP [ 11 ], SKNEE [ 35 ] or WCLIP [ 36 ].
The assessment of image preferences was carried out through the implementation of an uncontrolled psychophysical experiment. The observers were presented with 24 times the same question wherein 6 images were reproduced using the 6 selected gamuts, the observers were also presented the original image in full color. Participants in the psychophysical experiments included 34 individuals( whose age range was 20 – 65 years old, and who were either junior college students or lab / company workers). Every observer had at least some background in either color science or image processing with either formal studies or being frequently exposed to laser-printed images, four of them could even be considered experts. All participants reported normal or corrected-to-normal vision. The experiments were conducted remotely using the participants’ personal computers. While no standard calibration was