Coding of digital data corresponding to a dithered image. The digital pixel values determined by comparison with a given threshold value of the dither matrix are combined to form a string. A string of this kind is formed for all the threshold values of the dither matrix. Strings found which are built...http://www.google.com/patents/US4965843?utm_source=gb-gplus-sharePatent US4965843 - Method and apparatus for coding digital image information obtained from dithering
