Image analysis – Pattern recognition – Feature extraction
Reexamination Certificate
2006-01-31
2006-01-31
Patel, Kanjibhai (Department: 2625)
Image analysis
Pattern recognition
Feature extraction
C382S264000, C382S275000, C382S276000, C382S304000, C382S266000, C348S607000
Reexamination Certificate
active
06993191
ABSTRACT:
Techniques for removing ringing artifacts from video data. A deringing filter in accordance with the present invention preserves real image edges in a video frame, while smoothing out the interiors of objects. In one aspect, a 9-tap low-pass filter is applied to an adaptive processing window. The filter window is initialized with the values in a 3×3 mask centered on the position whose output is computed. Then all values that are very different from the central one are replaced with the central value. The deringing filter varies between 3×3 low-pass and identity, depending on how much the central value differs from its surrounding ones. A deblocking filter in accordance may also be suitably used in conjunction with the deringing filter.
REFERENCES:
patent: 4797740 (1989-01-01), Harasaki et al.
patent: 5475421 (1995-12-01), Palmer et al.
patent: 5659626 (1997-08-01), Ort et al.
patent: 5748796 (1998-05-01), Pennino et al.
patent: 5802218 (1998-09-01), Brailean
patent: 5850294 (1998-12-01), Apostolopoulos et al.
patent: 5974197 (1999-10-01), Lee et al.
patent: 6188799 (2001-02-01), Tan et al.
patent: 6226050 (2001-05-01), Lee
patent: 6574374 (2003-06-01), Acharya
patent: 6643395 (2003-11-01), Okabe
patent: 6665447 (2003-12-01), Chan
patent: 6674906 (2004-01-01), Han et al.
patent: 6807317 (2004-10-01), Mathew et al.
patent: 2003/0219073 (2003-11-01), Lee et al.
Petrescu, IEEE Publication, May 2001, “Efficient implementation of video post-processing algorithms on the BOPs parallel architecture”. (pp. 945-948).
Patel Kanjibhai
Priest & Goldstein PLLC
PTS Corporation
Seth Manav
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