US 6,982,814 B1
Image printing devices with AM/FM half-toning with self-determination of dot size and method of implementing same
Allen L. Frazier, Eagle, Id. (US); and Jan P. Allebach, W. Lafayette, Ind. (US)
Assigned to Hewlett-Packard Development Company, L.P., Houston, Tex. (US)
Filed on Aug. 23, 2000, as Appl. No. 9/648,531.
Int. Cl. H04N 1/40 (2006.01); B41J 2/47 (2006.01)
U.S. Cl. 358—3.12 31 Claims
OG exemplary drawing
 
1. An image printing device comprising:
an input for receiving an image data signal in said image printing device; and
a processor in said image printing device for receiving and processing said image data signal;
wherein
at a certain stage of the processing said image data signal contains one bit per pixel data specifying location data for each dot of which an image described by said image data signal is constituted but not a size for each said dot, and
said processor estimates a dot density in a defined area around each said dot, and determines a size for each said dot based on the estimated dot density for that said dot.