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A new class of chromatic filters for color image processing. theory and applications

机译:用于彩色图像处理的新型彩色滤光片。理论与应用

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This paper advances a new framework for chromatic filtering of color images. The chromatic content of a color image is encoded in the CIE u'v' chromaticity coordinates whereas the achromatic content is encoded as CIE Y tristimulus value. Within the u'v' chromaticity diagram, colors are added according to the well-known center of gravity law of additive color mixtures, which is generalized here into a nonlinear filtering scheme for processing the two chromatic signals u' and v'. The achromatic channel Y can be processed with traditional filtering schemes, either linear or nonlinear, depending on the specific task at hand. The most interesting characteristics of the new filtering scheme are: 1) the elimination of color smearing effects along edges between bright and dark areas; 2) the possibility of processing chromatic components in a noniterative fashion through linear convolution operations; and 3) the consequent amenability to computationally efficient implementations with fast Fourier transform. The paper includes several examples with both synthetic and real images where the performance of the new filtering method is compared with that of other color image processing algorithms.
机译:本文提出了一种对彩色图像进行彩色滤光的新框架。彩色图像的色度内容在CIE u'v'色度坐标中编码,而消色差内容被编码为CIE Y三刺激值。在u'v'色度图中,根据众所周知的加色混合色心重心法则添加颜色,在此将其概括为用于处理两个色度信号u'和v'的非线性滤波方案。根据手头的具体任务,可以使用线性或非线性的传统滤波方案来处理消色差通道Y。新过滤方案最有趣的特征是:1)消除了沿明暗区域之间的边缘的颜色拖影效果; 2)通过线性卷积运算以非迭代方式处理色度分量的可能性;和3)因此可以使用快速傅立叶变换进行计算上高效的实现。本文包含了一些合成和真实图像的示例,这些示例将新过滤方法的性能与其他彩色图像处理算法的性能进行了比较。

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