Patent ID: 7418133
Filing Date: 2008-08-26
Classification: H04N

Abstract:
1. A system of image correction, utilized to receive an image and produce a revised image, comprising: an image acquisition unit, configured to receive the image, the image comprising a plurality of pixels, each pixel comprising a pixel value corresponding to one of a plurality of color-scale values; a distribution calculation unit, configured to calculate a frequency value for each of the color-scale values, representing how many pixels in the image correspond to each of the color-scale values; a potential range calculation unit, configured to acquire a color-scale threshold by accumulating the frequency values of the color-scale values from the brightest end to a color-scale value being the color-scale threshold until an accumulated frequency value exceeds or equals a ratio of total pixels, and acquire a lower color-scale limit and an upper color-scale limit by respectively adding and subtracting a range value to and from the color-scale threshold; a weighted value calculation unit, configured to acquire a weighted value for pixels with the pixel values between the lower color-scale limit and the upper color-scale limit; and an image correction unit, configured to replace the pixel values between the lower color-scale limit and upper color-scale limit with the weighted value, thereby generating the revised image.