Patent ID: 9030607
Filing Date: 2015-05-12
Classification: H04N

Abstract:
1. A method for restraining erroneous image luminance to correct a luminance signal of a target pixel of an image field, and said method comprising: selecting a pixel area including said target pixel from said image field; comparing luminance signals of pixels in said pixel area with a predetermined pattern; determining whether said target pixel is on edge if said luminance signals of said pixels of said pixel area match said predetermined pattern; and correcting said luminance signals of said pixels of said pixel area according to a low-pass filtering algorithm if responsive to said luminance signals of said pixels of said pixel area matching said predetermined pattern and said target pixel is not on edge, wherein said pixel area comprises said target pixel and a plurality of adjacent pixels of a same row of said target pixel, wherein correcting further comprises: comparing the luminance signals of said target pixel and said adjacent pixels with respective pixels of said predetermined pattern; determining there is said match based on a defined threshold closeness in luminance values of the luminance signals of said target pixel and said adjacent pixels to luminance values of said respective pixels of said predetermined pattern, wherein a defined threshold closeness for a first set of pixels of the pixel comparisons is different than a defined threshold closeness for a second set of pixels of the pixel comparisons.