Patent ID: 8503819
Filing Date: 2013-08-06
Classification: G06T

Abstract:
1. A method for correcting defect pixels in an image signal, which comprises a plurality of pixels, comprising steps of: (a) generating a luminance histogram for the pixels in the image signal; (b) selecting N candidate defect pixels from the pixels according to the luminance histogram, N being a positive integer, wherein the pixel having a luminance belonging to a predetermined luminance range in the luminance histogram is selected to be a defect pixel; (c) setting a window for each of the N candidate defect pixels; (d) calculating N averaged luminance corresponding to the N windows; (e) judging whether an absolute difference between the luminance of each candidate defect pixel and the corresponding averaged luminance is larger than a second threshold, and if YES, recording the candidate defect pixel as a real defect pixel; and (f) utilizing at least one non-defect pixel around the real defect pixel to correct the real defect pixel.