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On Accurate Color Calibration for Digital Cameras

机译:数码相机的精确色彩校准

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Conversion from raw camera coordinates to a standard color space is developed here as a direct product of two independent maps, one for chromaticity coordinates of hue and saturation, the other tor brightness. The principal focus is on the former. While the main approach is a target-based mapping, comparison with a more conventional approach shows that the structure of chromaticity tor point reflection spectra at the capture gamut boundary influences the map far into the interior. Failure to account properly for this systematic effect is the largest source of error in standard color mappings. Restriction to chromatic mappings defines a class of corresponding chromatic metamers. Failure of a camera to satisfy the Luther condition produces two distinct classes of chromatic metamer errors: essential and adventitious.
机译:这里开发了从原始相机坐标到标准色彩空间的转换,这是两个独立贴图的直接乘积,一个是色相和饱和度的色度坐标,另一个是明暗度。主要重点是前者。尽管主要方法是基于目标的映射,但与更常规方法的比较表明,捕获色域边界处色度点反射光谱的结构会影响到内部的地图。未能适当考虑这种系统影响是标准颜色映射中最大的错误来源。对色映射的限制定义了一类相应的色元。照相机不能满足路德条件会产生两类不同的色差异构体错误:必需的和不定的。

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