Bilevel or Trilevel Displays Representative of Gray Scale Images
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
This article relates to the generation of bilevel or trilevel images from gray scale images using complementary sequences. A computer output device, such as a printer or a display, is primarily a bilevel device, i.e., it gives only "on" and "off" outputs. In certain printers, such as thermal printers, the printer head can be made to print three or four levels in intensity.