Process for length measurement by means of a photosensitive netw

Details Process for length measurement by means of a photosensitive netw Process for length measurement by means of a photosensitive netw

1989-02-10

1990-07-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356387, G01N 2186

Patent

active

049393782

ABSTRACT:
Process for measuring lengths by means of a photosensitive network camera, characterized in that the process consists in integrating the video signals (V) over all or part of each of the scan lines (BI); following the evolution of the integral (I) during successive scans (BI) in the vicinity of the edges (9); and precisely locating the points in the integral curve (I) corresponding to the edges (9) in the image (8) of the object (1) to be measured.

REFERENCES:
patent: 4351437 (1982-09-01), Long
patent: 4596037 (1986-06-01), Bouchard et al.
patent: 4650335 (1987-03-01), Ito et al.
patent: 4818110 (1989-04-01), Davidson
Patent Abstracts of Japan, vol. 10, No. 327, (P-513)(2383), 7 Nov., 1986, & JP, A, 61133806 (Tsubakimoto Chain Co., 21-Jun.-1986).

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