Image analysis – Image transformation or preprocessing – Changing the image coordinates
Patent
1996-09-26
1998-05-12
Coles, Edward L.
Image analysis
Image transformation or preprocessing
Changing the image coordinates
382235, 382297, 382232, 358426, 3582613, 358432, 358433, G06K 932, G06K 936, H04N 141, H04N 1415
Patent
active
057518653
ABSTRACT:
The present invention is a method and apparatus for the rotation of images in conjunction with a block-wise, variable-length data compression operation. In a preferred embodiment, the rotation of image blocks on a microscopic level is accomplished independently from the rotation of the blocks themselves (macroscopic), stored in electronic precollation memory and the rotated image produced upon decompression of the stored rotated data. The two stage process allows the use of standardized JPEG or similar variable-length compression schemes, thereby accomplishing the rotation in conjunction with compression and minimizing the need for large memory buffers to accomplish image rotation
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Banton Martin E.
Micco Felice A.
Basch Duane C.
Coles Edward L.
Harris Tia M.
Xerox Corporation
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