Image analysis – Pattern recognition – Template matching
Patent
1995-05-16
1998-03-03
Boudreau, Leo
Image analysis
Pattern recognition
Template matching
356394, 382152, 382154, G02B 2746
Patent
active
057244472
ABSTRACT:
An image processing method and apparatus in which a range image of a three-dimensional object is obtained, and the inclination of a plane contained in the range image and an approximate area of the plane are instantaneously detected, thereby realizing high-speed recognition of a three-dimensional object. The apparatus includes a range image obtaining device (401) for obtaining a range image as three-dimensional information about an object, an image display device (402) for displaying the obtained range image as a phase distribution, a Fourier transform optical system (403) which employs approximately parallel coherent light for reading out the image displayed on the image display device, and a Fourier transform lens for carrying out Fourier transformation on the image read out by the coherent light, a Fourier transform spectrum detecting device (404) for detecting a Fourier spectrum image obtained by the Fourier transform optical system, and a recognition device (405) for identifying a three-dimensional object which is to be recognized by comparing the data detected by the detecting device with previously inputted information concerning a reference object, thereby detecting a normal to a plane contained in the obtained range image and an approximate area of the plane at high speed.
REFERENCES:
patent: 5159474 (1992-10-01), Franke et al.
K.P. Horn, et al. "The Mechanical Manipulation of Randomly Oriented Parts", Scientific American, vol. 251, No. 2; pp. 100-106, 108, 110, 111, 1984.
Paquet, et al. "Range Image Segmentation using the Fourier Transform", Optical Engineering, Sep. 1993, vol. 32, No. 9, pp. 2173-2180.
Boudreau Leo
Olympus Optical Co,. Ltd.
Werner Brian P.
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