The image process method comprises: A. multiplying these linear-calculation matrixes, including the transition matrix to transfer pixel RGB data into color space with separated brightness and chroma into a unique processing matrix; and B. multiplying the said unique matrix to pixel EGB data to obtain the pixel point data with separated brightness and chroma, then taking Gamma correction for brightness component. This invention increases processing speed, reduces difficulty on chip design and production, and decreases power consumption and cost.