Advanced Demosaicing Methods Using the Changes of Colors in a Local Region

Abstract

Conventional demosaicing methods often generate an artifact noise near a color edge because they cannot adapt to the changes of colors there. We have therefore proposed a new demosaicing method that interpolates a missing color on the basis of results obtained from an analysis of color changes in a local region. We propose analyzing the correlation of color signals by comparing the differences in color signals and by using regression analysis. The missing color is thus interpolated adaptively. We have compared conventional demosaicing methods with our method and have shown that our method can be used to reduce the artifact noise and give a higher quality image.