Colourisation in Yxy colour space for purple fringing correction

摘要

Purple fringing is an undesirable colour artefact in images acquired from digital cameras. As digital cameras are getting smaller these days with supporting high-quality images, purple fringing has become a serious problem. This study proposes an effective purple fringing correction method using colourisation in the Yxy colour space. In the proposed method, a chromaticity diagram-based method is used to detect the purple fringed region (PFR), and then this region is corrected by colourisation. The colours of intact pixels near the PFR are set to those of the seed pixels. Experimental results using a number of test images with purple fringing show that the regions, which are corrected by the proposed method, look more natural to human observers than those that are corrected by other existing methods