Patent №
US 4,855,830
Granted
1989-08-08
Filed 1987
Owner
ALLEN-BRADLEY COMPANY, INC.
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
07031414
In a video machine vision system, an apparatus compensates for varying light levels by defining a portion of the video image. A circuit is provided to measure the luminance of the video signal for the portion of the image and use that luminance to set a threshold level. The threshold level is employed in processing the image. As lighting conditions vary the luminance is re-measured causing a proportional variation in the threshold.
AI classification
Ownership
ALLEN-BRADLEY COMPANY, INC.
assignment · 46870008
Assignors
DAVIS, WESLEY, GASPERI, MICHAEL L.
On an employer assignment, the assignors are typically the inventors.