System for detecting edge of image

Details System for detecting edge of image System for detecting edge of image

1988-10-13

1989-09-12

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 22, G06K 946

Patent

active

048667838

ABSTRACT:
A system for detecting an edge of an image includes a scanning circuit for scanning the image to produce a composite video signal including an image signal and a horizontal synchronizing signal, a converting circuit for converting the image signal, into a binary image signal, a detecting circuit for detecting a change in level of the binary image signal so as to produce a detecting signal, a timing signal generator for producing clock pulses, a first data-producing circuit responsive to the clock pulses and the horizontal synchronizing signal for producing X coordinate data with respect to each horizontal scanning line, a second data-producing circuit responsive to the horizontal synchronizing signal for producing a predetermined data, a memory, and a data write circuit responsive to the horizontal synchronizing signal and the detecting signal for loading the predetermined data and the X coordinate data sequentially onto the memory.

REFERENCES:
patent: 4069411 (1978-01-01), Morton
patent: 4115805 (1978-09-01), Morton
patent: 4115806 (1978-09-01), Morton

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