Patent ID: 8665287

Claim:
A color information interpolation method for an image processor, comprising: receiving a luminance information corresponding to a pixel matrix from an image detector by the image processor, wherein the luminance information is arranged in a Bayer pattern and records a specific color information of each pixel of the pixel matrix, and the specific color information is one of a red color information, a green color information and a blue color information; calculating a horizontal detail variance and a vertical detail variance of a pixel according to the luminance information by a detail calculation unit of the image processor; and interpolating the pixel of the luminance information with one of a horizontal color information estimate, a vertical color information estimate and a directionless color information estimate according to the horizontal detail variance and the vertical detail variance by an interpolation determination unit of the image processor, to derive color information of the pixel other than the specific color information; wherein the step of calculating the horizontal detail variance and the vertical detail variance according to the luminance information by the detail calculation unit of the image processor comprises: calculating a first horizontal detail variance and a first vertical detail variance of the pixel according to the pixel and all pixels around the pixel of the luminance information by the detail calculation unit of the image processor; and calculating a second horizontal detail variance and a second vertical detail variance of the pixel according to the pixel and other pixels around the pixel of the luminance information which have a same color information as a desired interpolation color information by the detail calculation unit of the image processor when both the first horizontal detail variance minus the first vertical detail variance and the first vertical detail variance minus the first horizontal detail variance are smaller than a first detail threshold.