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Optical transform system for three-dimensional object recognition

  • US 5,724,447 A
  • Filed: 05/16/1995
  • Issued: 03/03/1998
  • Est. Priority Date: 05/17/1994
  • Status: Expired due to Fees
First Claim
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1. An image processing apparatus comprising:

  • means for obtaining a range image as three-dimensional information about an object;

    means for displaying obtained range image as a phase distribution;

    a Fourier transform optical system including approximately parallel coherent light for reading out the image displayed on said image display means, and a Fourier transform lens for carrying out Fourier transformation on the image read out by said coherent light;

    means for detecting a Fourier spectrum image obtained by said Fourier transform optical system;

    means for storing reference data including data concerning a vector normal to a surface constituting a reference three-dimensional object which has previously been measured and data concerning an area of the reference three-dimensional object which has previously been measured; and

    means for recognizing an object at high speed by comparing information concerning the Fourier spectrum image obtained by said detecting means with said reference data.

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