Image processing method and apparatus

Details Image processing method and apparatus Image processing method and apparatus

1992-05-08

1995-12-26

Boudreau, Leo H.

Image analysis

Image enhancement or restoration

Edge or contour enhancement

382263, 382218, 382199, G06K 940

Patent

active

054795370

ABSTRACT:
In an image processing method of effecting the pattern matching of an input image and a pre-memorized reference image, the reference image is pre-memorized in memory means and the input image is input to input means. The reference image and the input image obtained from the memory means and the input means, respectively, have the same differential filters applied thereto by differentiation means, whereby a differential reference image and a differential input image are obtained. The differential reference image and the differential input image are input to differential correlation value calculation means or inner product sum calculation means, whereby the cross-correlation value or the inner product sum of these is calculated, and the local maximum value of the cross-correlation value or the inner product sum is found by image recognizing means to thereby find the relative positional relation between the reference image and the input image.

REFERENCES:
patent: 3986000 (1976-10-01), McJohnson
patent: 5018218 (1991-05-01), Peregrim et al.
patent: 5068746 (1991-11-01), Ohsawa et al.

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