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Spectral information and spatial color computation

机译:光谱信息和空间色彩计算

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In real world no color exists. Only spectral light distributions interact to form the final color sensation. This paper presents preliminary experiments whose purpose is to test the robustness of a spatial color computation in relation to changes in the acquisition of spectral information. The basic idea is that human vision system has evolved into a robust system to acquire visual information, in this case the color, adapting to varying illumination conditions to guarantee color constancy. The presented experiments test changes in the output of a Retinex-derived tone mapping operator, varying illuminants and color matching function curves. Synthetic high dynamic range multispectral images have been computed by a photometric ray tracer using different illuminants. Then, using standard and modified color matching functions, a set of high dynamic range RGB images has been created. This set has been converted to standard RGB images using a linear tone mapping algorithm with no spatial color computation and one based on Retinex, performing a spatial color normalization. A discussion of the results is presented.
机译:在现实世界中,不存在任何颜色。只有光谱光分布相互作用才能形成最终的色彩感觉。本文提出了初步的实验,其目的是测试与光谱信息获取变化有关的空间色彩计算的鲁棒性。基本思想是,人类视觉系统已发展成为一种强大的系统,可以获取视觉信息(在这种情况下为颜色),以适应变化的照明条件以保证色彩恒定。提出的实验测试了Retinex派生的色调映射运算符的输出变化,变化的光源和颜色匹配函数曲线。合成的高动态范围多光谱图像已由光度射线跟踪仪使用不同的光源进行计算。然后,使用标准和修改后的色彩匹配功能,创建了一组高动态范围RGB图像。使用线性色调映射算法将该集合转换为标准RGB图像,该算法无需空间色彩计算,并且基于Retinex进行空间色彩归一化。讨论了结果。

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