A hybrid demosaicking algorithm using frequency domain and wavelet methods

Demosaicking is the process of reconstructing a full color image from the incomplete color samples output of an image sensor overlaid with a color filter array. Most demosaicking algorithms usually suffer from visible color artifacts such as false colors. In this paper the hybrid use of frequency domain demosaicking with wavelet decomposition postprocessing is employed to reduce color artifacts usually found around edges. The algorithm is iterative and an adaptive stopping criterion is suggested. Results show an improvement in terms of visual and numerical comparisons using peak signal-to-noise ratio (PSNR) between the demosaicked image before and after postprocessing.