An image reduction system which reduces binary level images is disclosed. In the system, a reduction pixel value is determined by using, as reference pixels for a filter operation: a plurality of surrounding pixels including an object pixel to be reduced; and reduced pixels, from among pixels which have...http://www.google.es/patents/US5271072?utm_source=gb-gplus-sharePatente US5271072 - Image reduction of binary images using filtering processing
Image reduction of binary images using filtering processing
