关键词: 彩色滤波阵列, 插值, 轮廓波, 局部高斯模型, 彩色全变差

Abstract: Single-chip digital cameras use Color Filter Array (CFA) to sample different color information; the color image CFA interpolation algorithm interpolates these data to produce an RGB image. A color image CFA interpolation algorithm was proposed based on contourlet local Gaussian model and Total Variation (TV). In order to improve the edge interpolation quality, the sparsity of image gradient was integrated in interpolation process, and the Color Total Variation (CTV) was introduced to measure the sparsity of the image gradient. The experimental results show that the proposed algorithm outperforms the classical algorithms in terms of both Peak Signal-to-Noise Ratio (PSNR) and visual quality.

Key words: Color Filter Array (CFA), interpolation, contourlet, local Gaussian model, Color Total Variation (CTV)