Corner-based image matching

Details Corner-based image matching Corner-based image matching

1991-05-31

1992-12-22

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 8, G06K 946

Patent

active

051739461

ABSTRACT:
An image matching method that uses corners of objects, rather than their edges, to determine if the objects match. Corner locations are obtained by finding changes of curvature in the edge boundaries of the image. The corners of a reference image are used to create a distance array, which is used as a look-up table to determine how far each corner of a test array is from a corresponding corner of the reference array. A close corner-to-corner relationship indicates a good match.

REFERENCES:
patent: 4479145 (1984-10-01), Azuma et al.
patent: 4630225 (1986-12-01), Hisano
Borgefors, "Distance Transformations in Digital Images", National Defence Research Institute of Sweden, reprint from Computer Vision, Graphics, and Image Processing, vol. 34 pp. 344-371, 1986.
Barrow, Tenenbaum, Bolles and Wolf, "Parametric Correspondence and Chamfer Matching: Two New Techniques for Image Matching", SRI International, Menlo Park, Calif., publication date unknown.

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