color correction is performed on a first set of three pixel values by determining a color phase of the pixel values . the determined color phase is used to determine a phase difference , and the phase difference is used to control an amount of color phase rotation applied to the chrominance pixel values of the first set . the color phase is also used to determine a first gain , and the first gain is used to control a scaling of the rotated chrominance pixel values , thereby generating color corrected chrominance pixel values . the color phase is also used to determine a second gain , and the second gain is used to control an amount of scaling applied to the luminance pixel value of the first set , thereby generating the color corrected luminance pixel value . how color phase determines phase difference , the first gain and the second gain is changed depending on lighting conditions .