Patent ID: 8305499

Claim:
An image processing circuit, comprising: an adaptor, comprising: a processing unit, for receiving an input video signal comprising information of a plurality of pixels, and for processing the input video signal to determine a color difference value corresponding to a target pixel according to chromatic information of at least two pixels adjacent to the target pixel; and a weight generator, coupled to the processing unit, for generating a weighting signal according to the color difference value, wherein the weighting signal comprises a weighting value of the target pixel; and a sharpening circuit, coupled to the adaptor, for performing a sharpening operation on the input video signal according to the weighting signal to generate a sharpened video signal, wherein the sharpening circuit comprises: a first multiplier, coupled to the adaptor, for multiplying the weighting value of the target pixel by a gain such that the sharpening circuit performs the sharpening operation on the input video signal according to the weighting signal and the gain to generate the sharpened video signal.