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Network and image area attribute discriminating device and method for use with said neural network

  • US 5,884,296 A
  • Filed: 03/11/1996
  • Issued: 03/16/1999
  • Est. Priority Date: 03/13/1995
  • Status: Expired due to Term
First Claim
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1. A device for discriminating whether an image in a block area contained in a document image is a halftone dot image, the device comprising:

  • means for performing a Fourier transformation based on image data in the block area and determining a spatial frequency spectrum relating to the image in the block area; and

    a neural network which produces a discrimination result indicating whether or not the image in the block area is a halftone dot image based on the determined spatial frequency spectrum.

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