Color demosaicing using multi-frame super-resolution

Despite the considerable advances in the fabrication processes of imaging sensors, their performance remains limited by theoretical constraints that compromise the achievable sensitivity, frame rate, signal to noise ratio, pixel size and spatial resolution. Therefore, signal processing techniques are needed to improve the final image quality. In this paper, we present a framework for producing a high-resolution color image directly from a sequence of images captured by a CMOS sensor that is overlaid with a color filter array. The method is based on iterative super-resolution that separately filters the color image planes, interpolates and combines these into a single output image. We present experimental results using synthetic image sequence as well as real data from CMOS sensors. The results confirm the potential of this technique to achieve superior image quality.