Image analysis – Image compression or coding – Including details of decompression
Reexamination Certificate
2008-01-07
2009-06-02
Bella, Matthew C (Department: 2624)
Image analysis
Image compression or coding
Including details of decompression
C382S190000, C382S162000, C382S250000, C382S251000, C382S232000, C375S240030, C375S240160, C375S240010
Reexamination Certificate
active
07542615
ABSTRACT:
This invention has as its object to detect an image area of interest in an image file by a method with a lighter processing load by making determination using characteristics of a quantization table.Since spatial frequency information, chromaticity information, and a quantization table are acquired for respective predetermined blocks from inputted compressed image data, and are used in combination upon searching the compression-recorded image data for an image of interest, information containing AC component information for each image data block is acquired without any advanced calculations, thus searching for the image of interest in the image file.
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Mizoguchi Shigeru
Suzuki Naohisa
Bayat Ali
Bella Matthew C
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
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