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Data processing system and method for producing shifted-element halftone screens

  • US 6,687,023 B1
  • Filed: 04/17/2000
  • Issued: 02/03/2004
  • Est. Priority Date: 04/17/2000
  • Status: Expired due to Fees
First Claim
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1. A method in a computer system for generating a halftone screened image from an input image, said method comprising the steps of:

  • generating a first threshold matrix which, when utilized to halftone a solid gray input image, generates a first halftoned output image which is a plurality of generally solid axial lines along a first axis, said first threshold matrix including a plurality of matrix elements; and

    shifting a plurality of groups of said plurality of matrix elements within said first threshold matrix to create a second threshold matrix which, when utilized to halftone said solid gray input image, generates a second halftoned output image which is a checkerboard type pattern of alternating black or white blocks.

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