Signal processing apparatus for eliminating ringing signal...

Details Signal processing apparatus for eliminating ringing signal... Signal processing apparatus for eliminating ringing signal...

2008-04-15

2008-04-15

Vu, Ngoc-Yen (Department: 2622)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

C382S257000, C382S260000, C382S263000, C382S308000, C348S252000

Reexamination Certificate

active

10758121

ABSTRACT:
Image quality degrading components can be eliminated from a contour correction signal of high frequency region that is used for contour correction. A filtering section extracts a high frequency region signal from a signal inputted from a VLPF. A mask generating section generates a mask by masking image quality degrading components (e.g., ringing components) contained in the extracted signal. A gain factor generating section generates a gain factor that eliminates image quality degrading components on the basis of the mask. A multiplier multiplies the extracted signal by the gain factor, and outputs an adder a resultant signal (horizontal contour correction signal free from the image quality degrading components). Since the horizontal contour correction signal is generated by eliminating the image quality degrading components from the high frequency region signal, the occurrence of ringing and the like can be suppressed to ensure excellent image quality.

REFERENCES:
patent: 6072538 (2000-06-01), Keating
patent: 6404936 (2002-06-01), Katayama et al.
patent: 6937277 (2005-08-01), Hattori et al.
patent: 6950561 (2005-09-01), Boroczky et al.
patent: 7057636 (2006-06-01), Cohen-Solal et al.
patent: 2001/0048474 (2001-12-01), Yamazaki et al.

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