Method and apparatus for halftone rendering of a gray image using a blue noise mask

  • US 5,543,941 A
  • Filed: 05/31/1994
  • Issued: 08/06/1996
  • Est. Priority Date: 12/04/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for the halftoning of color images which comprises the step of utilizing, in turn, a pixel-by-pixel comparison of each of a plurality of color planes of said color image against a mask in which the mask comprises a non-determinate, non-white noise single valued function which is designed to provide visually pleasing dot profiles when thresholded and wherein said step of utilizing said pixel-by-pixel comparison is used to produce a halftoned image.

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