Picture Generation With a Standard Line Printer A method is described for producing gray-toned pictures on a line printer by utilizing the different degrees of blackness of standard print characters. Gray scales with 17, 32 and 64 levels have been devised. Scanned images of blood cells are used to display the technique. CACM May, 1964 Perry, B. Mendelsohn, M. L. CA640522 JB March 9, 1978 11:31 PM 1067 5 1067 1067 5 1067 1067 5 1067