Title:
【発明の名称】伸張された画像の後処理
Document Type and Number:
Japanese Patent JP2002531972
Kind Code:
A
Abstract:
This invention relates to a system and method for reducing blocking artifacts introduced by current compression algorithms that compress images as independent blocks of pixels. Preferably, the methods of the invention include determining block-to-block differences in edge pixels or in overall intensities between adjacent pixel blocks, selecting pixel blocks for post-processing that appear to be in relatively featureless regions of the image, interpolating the block-to-block edge differences into a error correction matrix, and then subtracting the error correction matrix from the original pixel block. These methods are preferably implemented in special software routines that execute on micro-processor based systems or on digital signal processor based systems optimized for image decoding.
Inventors:
Racket Albert E
Application Number:
JP2000585826A
Publication Date:
September 24, 2002
Filing Date:
November 18, 1999
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
G06T5/30; G06T9/00; H04N1/41; H04N7/26; G06T5/20; (IPC1-7): H04N1/41; G06T5/20; G06T5/30; H04N7/24
Attorney, Agent or Firm:
Susumu Tsugaru (1 person outside)