Frederick C Mintzer, Karen L Anderson, Joan L Mitchell: Method for expansion of a digital image. International Business Machines Corporation, George E Clark, Thomas P Dowd, February 4, 1986: US04569081 (28 worldwide citation)

A method for expanding a binary image includes the steps of: storing the image in bit sequence; inserting for each string of 5 bits along a first axis one or more expansion bits, to convert each said string of 5 bits to a string of 6 bits; assigning a value to each expansion bit generated by the abo ...