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...http://www.google.fr/patents/US4689824?utm_source=gb-gplus-shareBrevet US4689824 - Image rotation method
