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Image processing apparatus using neural network

  • US 5,309,525 A
  • Filed: 06/11/1991
  • Issued: 05/03/1994
  • Est. Priority Date: 06/14/1990
  • Status: Expired due to Term
First Claim
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1. An image processing apparatus for estimating multivalued image data from binary image data converted by a binarizing method which exerts a large influence on surrounding multivalued pixels in specific directions with respect to a multivalued pixel undergoing binarization by the method, comprising:

  • input means for inputting binary image data comprising a plurality of pixels which include a pixel of interest that is to be subjected to multivalued conversion, the plurality of pixels being arranged so that a number of binary pixels in a first specific direction with respect to the position of the pixel of interest is larger than that of pixels in a direction other than the first specific direction, the pixels in the first specific direction being ones having a large influence upon the pixel of interest; and

    multivalued converting means for executing processing, using a neural network, to restore the input binary image data to multivalued image data for the pixel of interest, wherein said neural network comprises;

    an input layer which includes a plurality of neurons for inputting the binary image data from the input means in individual pixel units;

    an intermediate layer which includes a plurality of neurons, connected to the input layer, for receiving outputs from the neurons of the input layer; and

    an output layer having one neuron, connected to the intermediate layer, for receiving outputs from the neurons of the intermediate layer and outputting one multivalued image data as image data of the pixel of interest.

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