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Image inspection device

  • US 5,757,981 A
  • Filed: 05/23/1997
  • Issued: 05/26/1998
  • Est. Priority Date: 08/20/1992
  • Status: Expired due to Fees
First Claim
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1. An image inspection device comprising:

  • reference image memory means for storing reference image data;

    projection value memory means for storing projection values of the reference image data projected along at least a first direction;

    optical sensor means for generating sample image data;

    projection calculation means for calculating projection values of the sample image data along at least the first direction;

    correlation calculating means for calculating a correlation value between the sample image data and the reference image data based on the projection values of the sample image data calculated by the projection calculation means and the projection values of the reference image data stored in the projection value memory means;

    reading means for reading the reference image data from the reference image memory means in accordance with the correlation value calculated by the correlation calculating means so that the reference image data read from the reference image memory means is correlated with the sample image data generated by the optical sensor means; and

    comparison means for comparing the sample image data with the reference image data read by the reading means.

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