Programmable controller vision system

G - Physics – 06 – T

Patent

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350/32, 354/55

G06T 5/40 (2006.01)

Patent

CA 1326070

Abstract A module for a programmable controller is adapted to process a video image to evaluate characteristics of an object within the image. A processor converts an analog video signal into four binary images. A memory stores data defining a separate sensor region for each binary image. A set of four counters is provided to tabulate the pixels of one color in each binary image that lie within the associ- ated sensor region. A video signal sensor measures vari- ation of the luminance of the video signal. The processor uses the luminance variation measurement to adjust the bi- narization of the video signal to produce normalized binary images under varying lighting conditions.

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