1. An image processing method, comprising: an image processor selecting a maximum gradient magnitude among gradient magnitudes for each of a plurality of color components of an image; the image processor calculating a boundary of a dilated near-saturation region in the image; the image processor detecting a transition region in the image according to the maximum gradient magnitude and the boundary of the dilated near-saturation region; and the image processor removing a color fringe from the transition region to obtain a processed image.