METHODS FOR PROCESSING COLOR IMAGE DATA EMPLOYING A CHROMA, HUE, AND INTENSITY COLOR REPRESENTATION

摘要

A method senses electromagnetic energy associated with a source over an area in N frequency bands and generates color image data representing at least a portion of the area. The data are arranged pixels, and the data for a given pixel comprise chroma (C), hue (H), and intensity (I) values. The N frequency bands constitute a mathematical basis in N-dimensional space, and one band establishes a first reference vector (36) in the space. Equal parts of all bands establish a second reference vector (GRAYLINE). A reference plane (40) contains the first and second reference vectors (36, GRAYLINE). The data for the pixel correspond to a point (22) in the space, and that point (22) and the second reference vector (GRAYLINE) define a plane of interest (41). Hue (H) is an angle between the reference plane (40) and the plane of interest (41). Chroma (C) is an angle between the point (22) and the second reference vector (GRAYLINE). Intensity (I) is the point's (22) Euclidean norm.