Method and apparatus for the identification of metal surface fin

Details Method and apparatus for the identification of metal surface fin Method and apparatus for the identification of metal surface fin

1989-07-17

1991-04-23

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 18, 382 28, 358101, 73104, G06K 900, G06K 946, G06K 952, G06K 966

Patent

active

050105787

ABSTRACT:
The apparatus includes a specialized scanning system for sampling the metal includes an annular light source for omindirectionally illuminating the surface, a light regulator, and a matrix camera for forming a grey level image of the surface. The image is histogramed according to grey level. The first four statistical moments are calculated from the histogram. The moments are then used as a feature vector to identify the metal surface. If no match is found within the catalogued metal surfaces, allowing for predetermined tolerances for each moment, then the feature vector is catalogued for future recognition.

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patent: 4229797 (1980-10-01), Ledley
patent: 4435837 (1984-03-01), Abernathy
patent: 4682220 (1987-07-01), Beurskens
patent: 4835708 (1989-05-01), Frans
Patent Abstracts of Japan, vol. 11, No. 15 (P-536) (2462), Jan. 16, 1987, JP-A-61 189 406 (Hitachi Ltd.) 23-08-1986.
Huynh, Van-Minh et al., "A New Optical Method of Paper Roughness Measurement for Hard-Copy Devices", Society for Information Display International Symposium, Digest of Technical Papers, New Orleans May 12-14, 1987, vol. XVIII, pp. 279-282, Palisades Institute for Research Services Inc., New York, U.S.

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