Image analysis – Histogram processing – For setting a threshold
Patent
1983-12-30
1987-08-25
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
340727, G06K 932
Patent
active
046898247
ABSTRACT:
A method for rotation of a binary image by 180 degrees, includes the steps of: positioning first and second address pointers at the center of at the beginning and end respectively of an image to be rotated; indexing the first pointer in a first direction through said image; indexing the second pointer in a second direction through said image; exchanging, for each index step, a first image word at the first pointer with a second image word, at the second pointer if the first image word and the second image word have any two bits with different values; reversing all exchanged words; storing the reversed, exchanged words at said pointer locations; repeating the above steps until the first pointer and the second pointer have been indexed through all words in the image at which point the image has been rotated by 180 degrees.
REFERENCES:
patent: 3976982 (1976-08-01), Eiselen
patent: 4168488 (1979-09-01), Evans
patent: 4225929 (1980-09-01), Ikeda
patent: 4366505 (1982-12-01), Tsuda et al.
patent: 4412294 (1983-10-01), Watts et al.
patent: 4493108 (1985-01-01), Fryer et al.
patent: 4545069 (1985-10-01), Kermisch
"Parallel Linear Transformations on Two-Dimensional Binary Images", Casey et al., IBM Tech. Disc. Bull., vol. 13, No. 11, Apr. 1971, pp. 3267-3268.
"Rotation of Images Using Contour Compressed Data", Morrin, T. H., IBM Tech. Discl. Bull., vol. 18, No. 18, Jan. 1976, pp. 2640-2642.
"Shift Register System for Image Orientation", Gold et al., IBM Tech. Disc. Bulletin, vol. 18, No. 8, Jan. 1976, 382-46.
Anderson Karen L.
Mintzer Frederick C.
Mitchell Joan L. V.
Boudreau Leo H.
Clark George E.
Couso Jose L.
Ilardi Terry J.
International Business Machines - Corporation
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