Perceptual Color Contouring Detection and Quality Evaluation using Scanners

摘要

Within color reproduction issues, the reproducible color gamut and color accuracy can be classified as degree zero problems with no interaction among neighboring pixels. Image color contouring, on the other hand, occurs when perceived local color change exceeds a threshold such that observers perceive unnatural color discontinuity. Therefore, it is the color correlation within neighboring pixels that determines the existence of color contouring artifact. In this proposal, the objective is to adopt a color flatbed scanner as the measuring device to obtain color as well as spatial information. A set of test targets with smooth geometrical color variation covering various cross sections in the color space are created and printed on different printing systems. Finally, an algorithm to identify the location color contouring is proposed.