Patent Number: 6,167,164

Title: One-dimensional signal adaptive filter for reducing blocking effect and filtering method

Abstract: A one-dimensional signal adaptive filtering method and a one-dimensional signal adaptive filter. The 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 includes 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; (b) calculating threshold values (T) for each pixel within the one-dimensional window, which is determined by a predetermined function of a quantization step (Q); (c) comparing the results of the gradient operation on each pixel within the one-dimensional window with the corresponding calculated threshold value to generate a comparison result as 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 value belonging to the one-dimensional filter window; and (e) performing filtering using the generated weighted values to generate new pixel values. The effect of the method is to eliminate blocking noise from a restored block-based image, thereby enhancing an image restored from compression.

Inventors: Lee; Yung-lyul (Seoul, KR)

Assignee: SamSung Electronics Co., Ltd.

International Classification: G06T 5/20 (20060101); H04N 7/30 (20060101); H04N 7/26 (20060101); G06K 009/40 (); G06K 009/46 (); G06K 009/56 (); G06T 005/00 ()

Expiration Date: 12/26/2017