The University of British Columbia

Consumer digital cameras usually use a single light sensor together with a color filter array (CFA) for capturing color images. This results in a mosaic image being captured, where only one color sample (red, green or blue) is obtained at each pixel location. Demosaicking is the process of interpolating the two missing color samples at each location to generate a full color image. Virtually all current demosaicking methods produce an RGB output image. If the image is to be compressed afterwards, it will typically be converted from RGB to YCbCr 4:2:0 formats. In this paper we propose a new demosaicking method that directly produces an YCbCr 4:2:0 images, so the output can be directly compressed. Simulation results show that the proposed method provides higher image quality than fast RGB based demosaicking methods and has lower computational complexity1.