In a preferred method for horizontal down-scaling of a pixel pattern, the down-scaling is performed on a byte-by-byte basis along each row of pixels. To avoid loss of information, if a pixel to be deleted is black and the black pixel has two original white immediate neighbors, the pixel to...http://www.google.com/patents/US5838838?utm_source=gb-gplus-sharePatent US5838838 - Down-scaling technique for bi-level images
