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Adaptive image resolution enhancement technology

  • US 6,178,011 B1
  • Filed: 03/24/1998
  • Issued: 01/23/2001
  • Est. Priority Date: 03/24/1998
  • Status: Expired due to Term
First Claim
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1. A process for halftoning a continuous-tone image to form a halftone image, the process comprising the steps of:

  • processing the continuous-tone image using a high frequency halftoning screen to form a high frequency continuously halftoned image;

    processing the continuous-tone image using a low frequency halftoning screen to form a low frequency continuously halftoned image; and

    forming a merged image by merging the high and low frequency continuously halftoned images based upon an activity index related to local change within the continuous-tone image, wherein a merge weight is applied based upon a function of the activity index.

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