Image processing for generating a representative color value indicative of a representative color of an image sub-area

摘要

A method of processing successive images of a video signal to generate a representative color value indicative of a representative color of an image sub-area. The method includes detecting a color property of the image sub-area in a current image, generating a filtered color property in respect of the current image by combining a color property for the current image with a filtered color property derived in respect of a corresponding sub-area of a previous image, and deriving the representative color value in dependence on a difference between the color property of the sub-area of the current image and the filtered color property.