Two-layer color filter array for high quality images

This paper proposes two-layer color filter array to obtain a high quality image and demosaic algorithms to interpolate the proposed two-layer color filter array. Although demosaic and color filter array design methods have been improved together, recent research results have shown the performance saturation since the sub-sampling of color channels is inevitable. To overcome this limitation, multilayer color filter arrays have been developed to obtain two or three color data at single pixel position. This paper proposes one of two-layer color filter array, which has a full resolution in G channel and a half resolution in R/B channel. To evaluate the performance, simple demosaic algorithms are presented. Although simple demosaic algorithms are applied, the experimental results show that the proposed color filter array not only increases CPSNR dramatically but also decreases the artifacts as like false color, aliasing.