Patent ID: 8494048
Filing Date: 2013-07-23
Classification: G06T,H04N

Abstract:
1. An image data filtering method for reducing blocking effect, the method comprising: (a) obtaining, by an image data filtering apparatus, absolute value of difference between values of pixels; (b) comparing, by the image data filtering apparatus, the obtained absolute value of difference with a quantization parameter (Q); and (c) performing filtering on the pixels around block boundaries, by the image data filtering apparatus, by changing the pixel values of the pixels according to the result of the comparison, wherein a first filtering process is performed to change the pixel values when the obtained absolute value is greater than the quantization parameter, and a second filtering process, different from the first filtering process, is performed to change the pixel values when the obtained absolute value is less than the quantization parameter, and wherein the obtaining the absolute value comprises obtaining an absolute value of a difference between a value of a single first pixel and a value of a single second pixel.