Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2006-02-14
2006-02-14
Frech, Karl D. (Department: 2876)
Registers
Coded record sensors
Particular sensor structure
C235S462010, C235S375000, C235S435000, C235S454000
Reexamination Certificate
active
06997387
ABSTRACT:
The present invention provides a novel optical reader device and method for calibrating the device. The device executes a calibration module that locates the actual coordinates for a targeting symbol in a captured image. The coordinates are stored as calibration coordinates in the memory. During normal operation of the reader device, the stored calibration coordinates are used to locate a target, such as a bar code. In order to locate the targeting symbol, the calibration module may overlay a template on clusters that may be the targeting symbol. A reasonable accurate comparison identifies the cluster as the targeting symbol. Alternatively, the calibration module may approach a cluster from four frames of the image and identify the cluster's tangents and perimeter. Geometrical calculations are used to identify the center of an identified targeting symbol.
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Hepworth Paul J.
Miyojim Mario
Taylor Morgan
Frech Karl D.
The Code Corporation
Walsh Daniel
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