Spatial gamut mapping algorithms for cross-display color reproduction

Hung-Shing Chen Shih-Han Chen Abstract — Owing to the fast developments of computer networks and color imaging technologies, there is a tendency towards remote proofing in the printing or textile industries. More cases such as cross-display color matching will occur in the future information society. The problems of color mismatching we usually find in cross-display devices have been widely discussed today. In this paper, to achieve equivalent color matching between a sRGB monitor and an Adobe RGB monitor, the spatial gamut mapping algorithm (SGMA), which introduces sigmoidal tone mapping, multi-mapping paths, and unsharp mask (USM) operation into a sRGB color-management system, is proposed. According to the designs of USM locations, this proposed SGMA can be further developed into pre-USM, postUSM, and double-USM types. Besides, two critical image characteristics, edge map and color histogram, are investigated to establish the relationship between image content and SGMA. The psychophysical experimental results show that double-USM SGMA obtains better color matching than the other spatial types.