Image rotation method

Details Image rotation method Image rotation method

G - Physics

06

T

375/4

G06T 3/60 (2006.01)

Patent

CA 1225479

ABSTRACT OF THE DISCLOSURE A method for rotation of a binary image by 180 degrees, includes the steps of: positioning first and second address pointers at the center or 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.

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