System for determining the contour of a plane form

Details System for determining the contour of a plane form System for determining the contour of a plane form

1973-09-11

1976-06-15

Griffin, Robert L.

Telegraphy

Systems

Simplex-reversing periodic

178DIG34, 178DIG36, H04N 538

Patent

active

039638669

ABSTRACT:
Disclosed is a system for determining the contour of a plane form in which system the plane form is exposed to an industrial television camera; the video signal from the camera is converted into a train of binary signals "1" or "0", depending on whether a sampling point is bright or dark on the photo-electric converting plane of the camera; and the contour of the plane form is determined from the incremental length of the camera movement relative to the plane form or from the amount of the phase-shift of the sampling pulse required for causing the inversion of binary signals at the sampling points close to the contour of the plane form.

REFERENCES:
patent: 3173015 (1965-03-01), Moneypenny et al.
patent: 3244810 (1966-04-01), Williams
patent: 3566129 (1971-02-01), Bardwell

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