Method And Device Of Constructing Uniform Color Space Directly From Raw Camera RGB

摘要

A method of constructing uniform color space directly from raw camera RGB and associated device is described. The method constructs a uniform color space from raw camera RGB may determine characteristics related to the imaging device. The method may also determine a direction and a scale of each of first, second and third perceptual color axes based at least in part on the characteristics related to the imaging device, such that a first perceptual color axis correlates with lightness, a second perceptual color axis correlates with yellow-blue color variations, and a third perceptual color axis correlates with red-green color variations. The second perceptual color axis may be substantially aligned with typical daylight variation.

主权项

1. A method of constructing a uniform color space from raw tristimulus values of an imaging device, comprising:
obtaining, by a processor, characteristics related to the imaging device; computing, by the processor, first, second and third perceptual color axes, the first perceptual color axis correlated with lightness, the second perceptual color axis correlated with a first color variation and substantially aligned with a daylight variation, the third perceptual color axis correlated with a second color variation and orthogonal to the second perceptual color axis; and scaling, by the processor, the first, second and third perceptual color axes so that a resulting distance in the uniform color space and a distance of Munsell colors in a CIELAB color space are substantially the same.