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一种用于数字图象传感器的彩色插值算法

DOI: 10.11834/jig.200305175

Keywords: 计算机图象处理(520?6040),图象传感器,彩色插值,颜色空间,彩色滤波阵列,有理函数

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Abstract:

由于物理结构的限制,单片CCD和CMOS彩色图象传感器在每个像素的位置上只能采集一个颜色分量,其余两个颜色分量只能通过插值的办法得到.鉴于通常的线性插值方法容易使图象的边缘变得模糊,并可能出现较为明显的颜色失真,而一些新方法尽管可以得到较高质量的插值图象,然而运算的复杂性限制了它们的应用.为此提出了一种在色差空间进行插值的算法,以代替普通颜色空间的插值,同时用基于有理函数的插值算子来代替普通的线性算子,并通过后处理来进一步提高插值图象的质量.由于色差空间的插值考虑了不同颜色分量间的耦合性,并利用了有理函数插值算子固有的边缘自适应特性,因而得到了较好的效果.该方法另外的一个优点是计算速度较快.实验结果表明,该该算法是有效的.

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