Method and system for video edge enhancement

Details Method and system for video edge enhancement Method and system for video edge enhancement

2004-08-30

2008-11-18

Bella, Matthew C. (Department: 2624)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

C382S162000, C382S167000, C382S266000, C382S269000, C382S263000, C358S426010, C358S426160, C348S453000

Reexamination Certificate

active

07454081

ABSTRACT:
A system and method that enhance edges in images by detecting and correcting edges of the components of the image, such as the luma and the chroma components. The luma and the chroma edges may be corrected to align with one another. The luma edge detection may utilize a combination of the first and second derivatives of luma. The chroma edges may be sharpened by adjusting the saturation of the chroma components, without changing the hue. The luma edges may be corrected using a blend of peaking and enhancing the luma edges. The corrected chroma and luma components may be then debugged and the appropriate corrected components may be sent to display. Chroma/luma edge alignment may utilize a product of the luma first and second derivatives.

REFERENCES:
patent: 4539703 (1985-09-01), Clearman et al.
patent: 5359437 (1994-10-01), Hibi
patent: 6192162 (2001-02-01), Hamilton et al.
patent: 6590617 (2003-07-01), Kanai et al.
patent: 6628842 (2003-09-01), Nagao
patent: 6697535 (2004-02-01), Dutta-Choudhury

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