Green Edge Directed Demosaicing Algorithm

In recent years, digital cameras have become the dominant image capturing devices. They are now commonly included in other digital devices such as mobile phones and PDAs, and have become steadily cheaper, more complex and powerful. In such devices, in order to keep costs down, only incomplete color information is recorded at each pixel location. Interpolating a full three-color image by estimating the missing component is called demosaicing. Clearly, the quality of this reconstruction is of crucial importance for the overall image quality experienced by the end-user. It influences sharpening perception, texture details, grain, color artifacts, signal to noise ratio and processing time. Hand-held devices suffer from inefficient demosaicing induced by their power limitations and their architectural constraints. In this paper we propose a new demosaicing algorithm delivering high image quality while keeping a computational complexity compatible with hand-held devices. Images quality and computational complexity are compared to the state of the art. An implementation of our algorithm on a common multimedia processor is presented and highlights the real time performance of our proposed algorithm 1