Constant-Hue-Based Color Filter Array Demosaicking Sensor for Digital Still Camera Implementation

In this paper, we propose an edge-oriented constant-hue scheme for a color filter array demosaicking sensor to reduce costs and the complexity of the digital camera system. Most digital still cameras use color filter arrays to sample the scenery. The image information needs proper interpolation to present a complete image. This paper proposes a novel design for color image interpolation to improve the result of such processing without great hardware and processing cost. The edge-oriented scheme and constant-hue interpolation are performed to process diagonal edge information. Experimental results show that our algorithm only adds some exquisite comparison function and provides a fine image quality. It is easy to implement in hardware design by simple operation.