Patent ID: 7978908

Claim:
A color signal interpolation method implemented in a color signal interpolation system including a sensor, a luminance compute device, an edge determinator and an average device, for performing a first color sample interpolation on a signal with a cross-color sample, the method comprising the steps of: (A) providing Bayer pattern neighboring color samples on an interpolation sample by the sensor, wherein the sensor has a Bayer color filter array; (B) computing a luminance respectively of the interpolation sample and the Bayer pattern neighboring color samples by the luminance compute device; (C) the edge determinator computing an edge value of the interpolation sample by using the luminance respectively of the interpolation sample and the neighboring color samples computed in step (B) based on a luminance domain wherein the luminance is the total of all colors of the Bayer pattern; (D) determining if the edge value is smaller than a predetermined threshold by the edge determinator; and (E) the average device computing an average of the neighboring color samples having the same color with the interpolation sample when the edge value is smaller than the predetermined threshold, and using the average as a first color output of the interpolation sample.