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US 7,444,027 B2Granted
Methods, devices, and systems for creating and compressing multi-level halftones
AssigneeHewlett-Packard Development Company, L.P.
InventorPeter G. Anderson
Life of this patent
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Abstract
Methods, devices and systems for compressing images are provided. One method includes creating halftone mask structures and applying compression coding techniques to arrayed pixels sorted using the halftone mask structures in order to convert an image to a compressed multi-level, halftoned image.
Claims6
A method for image handling, comprising:
- creating one or more halftone mask structures;
- receiving an image having a plurality of pixels arrayed in both an H and a W dimension;
- replicating each pixel N times in the W dimension to create an elongated image having dimensions H.times.NW;
- sorting the elongated image using the one or more halftone mask structures as a sort key.
1 more element
Dependencies are inferred from the claim text.