Patent ID: 7970228
Filing Date: 2011-06-28
Classification: G06T

Abstract:
1. An image processing method applied in an image processor, the image processor receiving an image from a host and outputting a processed image to a display device, the image comprising a plurality of first pixels each having a corresponding pixel value, the corresponding pixel values of the first pixels are distributed within a first distribution range, wherein the first distribution range is bounded between a maximum pixel value and a minimum pixel value, the image processing method comprising: obtaining a plurality of second pixels from the first pixels, wherein a difference between the pixel values of adjacent second pixels is less than a predetermined value, and the second pixels comprise a region; applying a gain to the image for adjusting the corresponding pixel values of the first pixels; obtaining a plurality of gained pixel values of the first pixels after applying the gain; obtaining an amount of distortion by summing up a plurality of weighted differences between a reference pixel value and the gained pixel value of each first pixel having the gained pixel value not distributed within the first distribution range, wherein a weighting factor of the weighted difference corresponding to the first pixel does not equal to 1 when the corresponding first pixel is within the region, and equals to 1 when the corresponding first pixel is outside the region; updating the gain according to the amount of distortion; and obtaining the processed image by applying the updated gain to the corresponding pixel values of the first pixels in the image.