Improving color saturation for color managed images rendered using the perceptual intent

Gabriel G. Marcu

doi:10.1117/12.774397

28 January 2008 Improving color saturation for color managed images rendered using the perceptual intent

Gabriel G. Marcu

Proceedings Volume 6807, Color Imaging XIII: Processing, Hardcopy, and Applications; 68070T (2008) https://doi.org/10.1117/12.774397
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

In many cases, rendering images using color management approach may result in unsatisfactory color, particularly for cases when the gamut mismatch is large and the source / destination profile pair does not lead to a satisfactory color. This more often the case when images on laptop computer screens with limited color gamut are transferred to print and color management is used. For those cases, we present a method of improving image quality by manipulating the display profile such that the color quality of the printouts is not compromised by the small gamut of the portable display and color management. The basic idea consists of using in the color management pipeline of a virtual gamut that has the role of either the source or of the destination depending on the type of transformation and the gamut size of the source and destination in the color management pipeline. In case the mismatch between the source and destination gamut is under a threshold the virtual gamut is not used. This virtual gamut is constructed directly in the CIE 1931 chromaticity diagram, although other color spaces may be used. A procedure to derive a constant hue line from two adjacent lines is presented. The chromaticities of the virtual gamut are computed based on the replaced gamut chromaticities and a weighting factor computed automatically at the time of rendering. The method proves to give very pleasing results in prints for example and the boost in saturation approximates very well the color enhancement achieved in silver halide photographic prints even for relatively modest print media.

Citation Download Citation

Gabriel G. Marcu "Improving color saturation for color managed images rendered using the perceptual intent", Proc. SPIE 6807, Color Imaging XIII: Processing, Hardcopy, and Applications, 68070T (28 January 2008); https://doi.org/10.1117/12.774397

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