A new approach for denoising CFA image

A CFA which is used in digital camera is a mosaic of selective filters, allows only one color component to respond at each pixel. The missing color has to be interpolated called color demosaicking (CDM). The traditional approach employ a separate denoising process after demosaicking but the drawback with this approach is that the untreated sensor noise before demosaicking can become the root of new color artifacts and this artifacts are difficult to remove. At the same time the author proposed methodology of providing denoising process before demosaicking using PCA which improves the image quality. This also shows visual quality and PSNR of original CFA image, image after denoising and final image after demosaicking.