Method and apparatus for generating serpentine halftone images
AssigneeXerox Corporation
InventorDouglas N. Curry
Life of this patent
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Abstract
An apparatus and method for producing a halftone image which generates halftone cells based on grayscale image data values. Each of the halftone cells is formed from serpentine dot patterns. The serpentine dot patterns form two separate arcs. The halftone cells are written onto a recording medium to produce the halftone image. Rotation of the halftone cells allows data to be encoded within each of the halftone cells without varying the tone of the image. The tone of the image may be controlled by selectively varying a thickness of the arcs within the halftone
Claims20
An apparatus for producing a halftone image, comprising:
- a halftone generator for generating halftone cells based on grayscale image data values, each of the halftone cells comprising serpentine dot patterns forming at least two separate arcs;
- and
- an output device for writing the halftone cells on a recording medium to produce the halftone image, wherein each of the halftone cells has four sides, each of the two arcs having two end portions, each of the end portions intersecting a center portion of one of the four sides.
A method of producing a halftone image, comprising:
- generating halftone cells based on grayscale image data values, each of the halftone cells comprising serpentine dot patterns forming at least two separate arcs;
- and
- writing the halftone cells on a recording medium to produce the halftone image, wherein each of the halftone cells has four sides, each of the two arcs having two end portions, each of the end portions intersecting a center portion of one of the four sides.
Dependencies are inferred from the claim text.