Patent ID: 8244054
Filing Date: 2012-08-14
Classification: G06T

Abstract:
1. A method capable of reducing image ringing noise, comprising: calculating a line spread function value of a luminance of each pixel in an input image; dividing the input image into a plurality of blocks, and calculating an average value and a maximum value of the line spread function values for all pixels in each block; based on the average value and the maximum value of the line spread function values of each block, determining whether a block is an interfered flat block or a non-interfered block; setting the pixels in the interfered flat block as noisy pixels; determining whether each pixel in the non-interfered block is an edge pixel or a non-edge pixel, and setting the non-edge pixels in the non-interfered block as noisy pixels; and smoothing the set noisy pixels, and combining smoothed pixels with the edge pixels for output as an output image.