<title>RLAB: a color appearance space for color reproduction</title>

Abstract

A new color space, RLAB, for cross-media color reproduction has been developed. This space is a modification of the CIE 1976 L*a*b* (CIELAB) color space which is widely used in a variety of industries. The RLAB modification of the CIELAB space allows for more accurate predictions of changes in color appearance due to chromatic adaptation, prediction of differences due to the types of media, and adjustment for changes in the relative luminance of the stimulus surround. In addition, the RLAB space can be used for the accurate calculation of color differences through a modification of the CIELAB color difference equation. These enhancements allow useful application of the CIELAB color space to problems of device- independent color imaging. This paper describes the formulation of the RLAB color space and its implementation. It is based on the chromatic adaptation model previously published by Fairchild and the Bartleson and Breneman corrections for image surround. In addition, psychophysical results comparing use of the RLAB color space to other techniques and color appearance models are presented.© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.