Detection and Removal of Rainboweffect Artifacts

Due to the imperfect separation of luminance and chroma signals in receiver´s demodulation, composite video signals suffer from rainbow effect artifacts, which present themselves as interlaced color stripes in regions of high luminance frequency and high luminance intensity. In this paper, we derive the formulas governing the rainbow effects. Based on these formulas, we propose a novel method to detect and remove these annoying artifacts. Experimental results on both captured video frames and simulated frames show that our method can remove the rainbow-effect artifacts effectively and improve the image quality notably.