Printing Process for Half-Tone Images With Dot Overlapping (Forward Correcting)
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-05
In the raster scanning of image originals, scanners supply percentage black levels (Fig. 1) in the order 1, 2, 3, 4, 5, 6 for the scan positions characterized by these figures. In each of the positions also marked 1, 2, 3, 4, 5, 6 a dot can be printed in the order of these numbers, with adjacent dots overlapping (Fig. 2). One individual dot has a predetermined black surface. If two dots overlap, the resulting overall black surface is smaller than twice the black surface of one single dot. With a corresponding computer-controlled printing process, it is possible to note for already printed dots the total amount of their black surfaces.