Dithered image for bi-level printing
A method of printing a contone image in the form an array of contone color pixel values using a printer adapted to print bi-level dots. In the method comprising the contone image is dithered using a dithering volume, the dithering comprising assigning for each dither cell location a fixed set of n thresholds defining n+1 intensity intervals within which the dither cell location is defined to an alternative not set and set.
1. A method of printing a contone image in the form of an array of contone color pixel values using a printer adapted to print bi-level dots, the method comprising dithering said contone image using a dithering volume, said dithering comprising assigning for each dither cell location a fixed set of n thresholds defining n+1 intensity intervals within which said dither cell location is alternatively not set and set; said method further comprising printing said dithered image.
2. A method of printing according to claim 1 , including the steps of dividing each dither cells into subcells, and storing each address of the subcells in separately addressable memories from which said n thresholds are retrieved in parallel.