Image analysis – Image compression or coding – Including details of decompression
Reexamination Certificate
2008-01-01
2008-01-01
Bella, Matthew C. (Department: 2624)
Image analysis
Image compression or coding
Including details of decompression
C382S166000, C382S248000, C375S240190, C708S203000
Reexamination Certificate
active
07315652
ABSTRACT:
An image processing apparatus for decoding a compressed image data, the image data being divided to a plurality of tiles, each of which is a basic unit of process in encoding or decoding process, said apparatus comprising: a detector which detects an existence status of ROI within said compressed image data based on a frequency transform coefficient of said tile for every tile; a determiner which determines whether each tile is a ROI tile composed of only ROI, a non-ROI tile composed of only non-ROI, or a ROI boundary tile composed of ROI and non-ROI based on said existence status of ROI detected by said detector; a processor which shifts only frequency transform coefficient of said ROI within each tile to lower bit side for said ROI tile and said non-ROI tile determined by said determiner, and which shifts frequency transform coefficients of both ROI and non-ROI within each tile to lower bit side.
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Ozawa Kaitaku
Takahashi Ken'ichi
Bella Matthew C.
Buchanan & Ingersoll & Rooney PC
Hung Yubin
Konica Minolta Business Technologies Inc.
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