Surface characteristics of a printed sample command a parallel group of visual attributes determining perceived image
quality beyond color, and they manifest themselves through various perceived gloss features such as differential gloss,
gloss granularity, gloss mottle, etc. Extending from the scope of ISO19799 with limited range of gloss level and
printing technologies, the objective of this study is to derive an appearance-based differential gloss quality scale ranging
from very low gloss level to very high gloss level composed by various printing technology/substrate combinations.
Three psychophysical experiment procedures were proposed including the quality ruler method, pair comparison, and
interval scaling with two anchor stimuli, where the pair comparison process was subsequently dropped because of the
concern of experiment complexity and data consistency after preliminary trial study. In this paper, we will compare the
obtained average quality scale after mapping to the sharpness quality ruler with the average perceived differential gloss
via the interval scale. Our numerical analysis indicates a general inverse relationship between the perceived image
quality and the gloss variation on an image.