|
HCL (Hue-Chroma-Luminance) is a commonly used alternative name for the L *C *h(uv) color space, also known as the ''cylindrical representation'' or ''polar CIELUV''. It is a color space model designed to accord with human perception of color. HCL has been adopted by information visualization practitioners to present data without the bias implicit in using varying saturation. == Overview == HCL is designed to address deficiencies in other models such as HSL and HSV (Hue-Saturation-Lightness and Hue-Saturation-Value). As the names imply, saturation is part of these models. Saturation is intended to measure the intensity of colorfulness, but different colors appear to the eye to have different intensity, even when they have the same saturation value according to HSL or HSV. HCL uses the LUV model defined by the International Commission on Illumination (CIE) in 1976, translated into polar coordinates. LUV is designed to be perceptually uniform, but the uv coordinates are not very intuitive. HCL preserves the L (luminance) axis of Luv, but transforms uv to polar coordinates, where the distance from zero is the ''chroma'' (an alternative measure of colorfulness), and the phase (angle) is our familiar hue. The older Munsell color system is based on different mathematics, but has some similarity to HCL. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HCL color space」の詳細全文を読む スポンサード リンク
|