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A cross-channel bilateral filter for CFA image denoising

High ISO image which is captured at low light environment has serious sensor noise. To avoid this problem, we propose a novel denoising framework for CFA image. We create cross-channel correlation map and explore method to denoise with the map to distinguish the noise from signal. And we propose the modified bilateral filter algorithm with the map. Experimental result show that proposed method has a good balance between denoising noise and edge preservation in high ISO image.