Spatially Varying Color Correction Matrices for Reduced Noise

Lim, Suk Hwan ; Silverstein, Amnon

HP Development Company

关键词: color correction;    image sensor;    noise;    digital photography;   

RP-ID  :  HPL-2004-99

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

Color space transformation (or color correction) needs to be performed in typical imaging devices because the spectral sensitivity functions of the sensors deviate from the desired target color space. Several researchers have shown that when the color channels are correlated, color correction can result in sensor noise amplification [1-4]. In this paper, we describe a color correction method that significantly alleviates the problem of noise amplification. The key idea is to use spatially varying color correction that adapts to local image statistics. We show experimental results that illustrate the reduction of noise when color correction is performed. 15 Pages