Dichromatic Gray Pixel for Camera-agnostic Color Constancy

We present a statistical color constancy method that relies on novel gray pixel detection and mean shift clustering. The method, called Mean Shifted Grey Pixel -- MSGP -- is compact, easy to compute and requires no training. Experiments on different datasets show that the proposed approach outperforms state-of-the-art methods in the camera-agnostic scenario. In the setting where the camera is known, MSGP outperforms all statistical methods.