Extraction of Image Gamut Surface and Calculation of its Volume

Publisher： Society for Imaging Science and Technology

ISSN： 2166-9635

Source： Color and Imaging Conference, Vol.2000, Iss.1, 2000-01, pp. : 330-334

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Abstract

Communicating color gamut is very important in color research and application. In this paper, we propose a new method for calculating the gamut volume by rearranging the color values. The entire color space is firstly divided by hue angle ∆H*ab and secondly by lightness angle ∆L*angle where the steps (∆H*ab, ∆L*angle) are decided in non-uniform to include the constant color samples in each segmented sector. The most out-side points from the center are extracted, and the gamut surface is constructed by each ordered points. While, triangles constructed by each ordered point are decided to be outward or inward. The inward side is assigned to a minus volume, and finally the entire gamut volume is calculated by summing up the individual volume of tetrahedron with selected color values. The proposed method enables to describe the three dimensional gamut surfaces of color devices and color images.