Patent ID: 6167164
Filing Date: 2000-12-26
Classification: G06T,H04N

Abstract:
A one-dimensional signal adaptive filtering method capable of reducing a blocking effect of image data when a frame is composed of blocks of a predetermined size, the method comprising the steps of:(a) applying a one-dimensional window of a predetermined size along the boundaries of the blocks to perform a predetermined gradient operation on each pixel within the one-dimensional window, thereby obtaining a gradient operation result for each pixel;(b) calculating threshold values (T) of each pixel within the one-dimensional window according to a predetermined function of a quantization step (Q);(c) comparing the gradient operation results for each pixel within the one-dimensional window with corresponding ones of the threshold values calculated in step (b) to generate respective binary values for a binary edge map;(d) applying a one-dimensional filter window of a predetermined size on the generated binary edge map to generate weighted values using the binary values belonging to the one-dimensional filter window; and(e) performing filtering using the generated weighted values to generate new pixel values.