Image analysis – Image enhancement or restoration – Edge or contour enhancement
Reexamination Certificate
2006-08-01
2010-02-23
Johns, Andrew W (Department: 2624)
Image analysis
Image enhancement or restoration
Edge or contour enhancement
Reexamination Certificate
active
07668392
ABSTRACT:
A pixel boundary difference detector detects a pixel boundary difference across a pixel boundary on the basis of a difference value between pixel values of adjacent pixels across the pixel boundary on a picture plane of an input image frame, and a predicted pixel value on the pixel boundary predicted from at least a plurality of pixels on one side of the pixel boundary, an accumulator accumulates the pixel boundary differences for one image frame, and a block noise detector detects a block noise on the basis of a result of the accumulation. The accuracy of block noise detection is improved, the effect of block noise reduction is improved, and the picture quality is improved.
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Nakagata Shohei
Yamada Kohji
Conway Thomas A
Fujitsu Limited
Johns Andrew W
Staas & Halsey , LLP
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