A method and system for double feed detection

Details A method and system for double feed detection A method and system for double feed detection

G - Physics

01

V

G01V 8/10 (2006.01) B65H 7/12 (2006.01) G01N 21/86 (2006.01)

Patent

CA 2401401

A system for detecting overlapped flat objects in a sequence of flat objects have at least one of their edges exposed for viewing as they pass along a feed path. The system includes a sensor for generating a signal in response to detecting a flat object in the feed path and a camera responsive to the signal for capturing a digital image of the exposed edges of the detected flat object in the feed path. A vision system is coupled to the camera for receiving the digital image. The vision system analyses at least a portion of the image to determine a pixel density variation along a direction perpendicular to the edges and uses the pixel density variation to output an indication of the number of edges in the image.

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