Towards A Uniform Lightness, Hue, And Saturation Color Model

Abstract

ABSTRACT GLHS—a generalized lightness, hue, and saturation color model is a generalization of several color models which are often used in computer graphics [5] l. It enables the realization of different models as special cases of the generalized model by specifying the values of two parameters (referred to as weights).A uniform color space is a color model in which distances between points adequately represent perceptual distances between the colors represented by these points.We discuss the search for a particular assignment of the weights in the GLHS model that will yield a special case that is as close to uniformity as possible. 1 INTRODUCTION Whenever color is used in computer graphics representation of parameter distributions, there are several prop­ erties of the color assignment that are desirable in order to make the representation effective. Uniformity—the property that assigns to parameter values colors whose perceptual distances correspond to the distances between the values is one of them.A Uniform Color Space (UCS) is a color model in which distances between points adequately represent perceptual distances between the colors represented by these points. One of the most commonly used UCS's for color monitors is the CIELUV uniform color space [1].If a color space is used to encode several (up to three) parameter distributions into a single multiparameter image, then the coordinates of the color space should be perceptually orthogonal, so that individual parameter values can be discerned at each point in the image [4,5,6].The color models of the Lightness, Hue, and Saturation (LHS) family appear to be the only color models that combine (limited) perceptual orthogonality with the ease of computer implementation [3,8].GLHS—a generalized lightness, hue, and saturation color model, is a generalization of several color models