Device and method for adjusting colour saturation

摘要

A method for adjusting and limiting a colour saturation level S of a colour pixel of an input image includes steps of: obtaining a first chrominance value U and a second chrominance value V representing the colour pixel of the input image; determining the colour saturation level S in dependence on the first chrominance value U and the second chrominance value V; determining a saturation limiting parameter beta in dependence on the colour saturation level S; obtaining an adjusted first chrominance value by multiplying the first chrominance value U by the saturation limiting parameter beta ; obtaining an adjusted second chrominance value by multiplying the second chrominance value by the saturation limiting parameter beta ; and representing a colour pixel of an output image with the adjusted first and second chrominance values. The process is repeated for each pixel of each image of the input video Signal. <IMAGE>