Yasuo Kurosu A method of scale conversion for binary image including dithered image. 28-37 1998 29 Systems and Computers in Japan 6 http://dx.doi.org/10.1002/(SICI)1520-684X(19980615)29:6<28::AID-SCJ3>3.0.CO;2-N db/journals/scjapan/scjapan29.html#Kurosu98a