1. A method of color image processing, comprising the following steps: converting a color image into an intermediate image having components that depend solely on H and S components of the original image in an HSV or HLS representation; the intermediate image having two components X and Y, determined by functions especially of the H component, these functions taking the same value when the H component is zero or equal to one; generating a new image having only one component from the intermediate image, the component of this new image being a function of the components of the intermediate image.