System for measuring shapes and dimensions of gaps and flushness

Details System for measuring shapes and dimensions of gaps and flushness System for measuring shapes and dimensions of gaps and flushness

1990-06-15

1992-07-07

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 67, 358107, G06K 900

Patent

active

051290103

ABSTRACT:
A system for measuring three-dimensional shapes and dimensions includes: an imaging unit which faces an object with shape changes on the surface and images by means of a TV camera the slit line formed on the object surface by projecting slit light from a slit light source at a fixed angle; and a surface feature extraction member for extracting features representing the shape changes of the object surface, based on the changes of the XYZ coordinate values of the object surface detected by triangulation based on the centroid position of the intensity distribution of the slit line image corresponding to the scanning lines from the TV camera. Based on features thus extracted, the surface shape of the object can be measured rapidly with high precision.

REFERENCES:
patent: 4460921 (1984-07-01), Henry et al.
patent: 4486842 (1984-12-01), Herman
patent: 4741621 (1988-05-01), Taft et al.
patent: 4752964 (1988-06-01), Okada et al.
patent: 4794262 (1988-12-01), Sato et al.
patent: 4837615 (1989-06-01), Boshier
patent: 4837616 (1989-06-01), Kasono et al.

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