Image processing circuit and image processing method

The invention discloses an image processing circuit and an image processing method. The image processing method can effectively deal with the phenomenon of abnormal color blocks produced by processing multi-pulse patterns in the prior art, can dynamically adjust the weight ratio so as to widely deal with the distribution situations of various colors in images, and is used for processing images based on a SECAM-system system. The image comprises a first pixel, a second pixel and a third pixel which are sequentially arranged on the same vertical line, and respectively correspond to a first video signal, a second video signal and a third video signal. The image processing method comprises the following steps: firstly, according to the first video signal, the second video signal and the thirdvideo signal, working out a chroma signal through a vertical filtering procedure; secondly, according to the chroma signal, working out a chroma angular frequency through a frequency demodulation procedure; and finally, accor