Deblocking and deringing apparatus, program and method

Details Deblocking and deringing apparatus, program and method Deblocking and deringing apparatus, program and method

2007-05-08

2007-05-08

Bella, Matthew C. (Department: 2624)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

C382S260000

Reexamination Certificate

active

10193306

ABSTRACT:
An image processor is provided which simplifies filter processing and increases the speed when an image is decoded, and is suitable for realizing effective screen effect.In deblocking filter processing, as to a pixel array intersecting a boundary between adjacent blocks, pixel values v2′ to v7′ after filtering are computed by filter arithmetic equations as shown belowin-line-formulae description="In-line Formulae" end="lead"?v2′=(v2+v5)/2+(v2−v5)/4in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?v3′=(v3+v5)/2+(v3−v5)/8in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?v4′=(v4+v5)/2in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?v5′=(v5+v4)/2+(v5−v4)/8in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?v6′=(v6+v4)/2+(v6−v4)/4in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?v7′=(v7−(v7−v4)/8.in-line-formulae description="In-line Formulae" end="tail"?

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Cheung et al., “Improving MPEG-4 coding performance by jointly optimizing compression and blocking effect elimination”, IEE proc.-Vis. Image Signal Process., vol. 148, No. 3, Jun. 2001.

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