False colors removal on the YCr-Cb color space

Postprocessing algorithms are usually placed in the pipeline of imaging devices to remove residual color artifacts introduced by the demosaicing step. Although demosaicing solutions aim to eliminate, limit or correct false colors and other impairments caused by a non ideal sampling, postprocessing techniques are usually more powerful in achieving this purpose. This is mainly because the input of postprocessing algorithms is a fully restored RGB color image. Moreover, postprocessing can be applied more than once, in order to meet some quality criteria. In this paper we propose an efficacious technique for reducing the color artifacts generated by conventional color interpolation algorithms, in YCrCb color space. This solution effectively removes false colors and can be executed while performing the edge emphasis process.