Methods of suppressing ringing artifact of decompressed images

Details Methods of suppressing ringing artifact of decompressed images Methods of suppressing ringing artifact of decompressed images

2008-03-04

2008-03-04

Harrison, Chante (Department: 2628)

Computer graphics processing and selective visual display system

Display driving control circuitry

Intensity or color driving control

C382S254000, C382S264000, C382S275000

Reexamination Certificate

active

07339601

ABSTRACT:
A suppression method that provides adaptive (i.e., selective) processing of an input picture to generate an enhanced output picture with ringing-like areas of the input picture suppressed. For each such window in the input picture, if the window is detected as around a ringing-like area in the picture, then the output pixel for the position of the window comprises the low-pass filtered (i.e., smoothed) pixel in the input picture. However, if the window is not detected as around a ringing-like area (i.e., the window is around a non-ringing-like area) then the output pixel for the position of the window comprises essentially the unchanged window in the input picture. As a result no blurring is introduced into the input picture in areas where ringing-like patterns are not detected. Therefore, the output picture includes portions of the input picture in which ringing-like patterns were not detected, and portions of the input picture with suppressed ringing-like patterns where detected. The output picture is an enhanced version of the input picture with suppressed (i.e., smoothed) ringing-like patterns.

REFERENCES:
patent: 5933540 (1999-08-01), Lakshminarayanan et al.
patent: 7079703 (2006-07-01), Kriss
patent: 2002/0131647 (2002-09-01), Matthews
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patent: 2004/0120597 (2004-06-01), Le Dinh
patent: 2005/0031223 (2005-02-01), Kusakabe et al.

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