适应HDR和WCG的恒定亮度颜色编码

Constant luminance color coding for HDR and WCG

传统的亮度-色差编码Y'C'_BC'_R在高动态范围和宽色域图像应用中,由于颜色信息量增大,致使亮度失真、量化误差增大、量化低效等,造成解码重现的图像质量下降。介绍一种新的恒定亮度颜色编码,利用符合人眼视觉特性的IPT颜色空间表达,在亮度和色差通道去相关性色相线性、颜色感知均匀性、基带量化效率等方面获得更优异的性能。

Because of increasing color information in HDR and WCG, traditional coding of luminance and color difference produce more hnninance distroy, highquantized error, low efficiency of quantization, and lead to decreased image quality. This paper in- troduce a new constant lunfinance color coding, with IPT color space representation which correspond to human visual system. The new coding have excellent performace in decorrelation between luminance and chrominance channel, hue linearity, color percep- tual uniformity and baseband quantization efficiency.