Journal Homepage: www.ijcst.org

Abstract – In single sensor digital color cameras at each pixel it captures only one of the three primary colors so the full color image is obtained by interpolating all other missing color samples at that pixel this process is the color demosaicking process. When we capture the images using digital cameras there is some sensor noise is introduced in image. This type of noise is introduced in all type of digital cameras that is low cost to high cost. So in reconstructing the images there are different strategies used to obtain the good quality images. Basically there are three different strategies, first strategy is demosaicking the image and after that denoise the image but in that process the artifacts occurs in initial color demosaicking method is hard to remove in subsequent denoising process. Second strategy is joint denoising demosaicking and third strategy is denoising before demosaicking so here last strategy is used. In this paper here first denoise the CFA image to remove sensor noise for that here use PCA based adaptive denoising method and after that demosaicking the image with nonlocal adaptive thresholding method. So here main advantage of this implementation is that by the use of Principal component analysis (PCA) based denoising this algorithm remove the sensor noise and by using the Nonlocal adaptive thresholding for demosaicking it reconstruct good quality images which having sharp color transition in it