Image analysis – Image compression or coding – Lossless compression
Reexamination Certificate
2007-11-20
2007-11-20
Alavi, Amir (Department: 2624)
Image analysis
Image compression or coding
Lossless compression
Reexamination Certificate
active
11604347
ABSTRACT:
An image processing device for compressing image data using conversion to spatial frequency components may include a dividing section that divides the image data into a plurality of pixel blocks and computes spatial frequency components of each pixel block; a segmenting section that computes an intensity of predetermined high frequency components from information of the spatial frequency components and segments the image data into a first plane formed by including a pixel block having an intensity which is less than a predetermined threshold value and into a second plane formed by including a pixel block having an intensity which is equal to or greater than the threshold value; a compression section that executes compression for the first plane image data by applying quantization and entropy coding using the spatial frequency components information; and a run length compression section that executes run length compression of the second plane image data.
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Japanese Office Action drafted on Jul. 25, 2006, mailed on Aug. 1, 2006 in Japanese Patent Application No. 2002-149220 filed May 23, 2002.
Alavi Amir
Fuji 'Xerox Co., Ltd.
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