Object sensor system for stationary position optical reader
AssigneeWelch Allyn, Inc.
InventorsAndrew Longacre, Jr., Robert M. Hussey
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Abstract
The present invention relates to a system for sensing the presence of an object in the field of view of an imaging assembly of a stationary position optical reader. The system includes a specialized symbol disposed in a stationary position in relation to the imaging assembly of a specially configured optical reader. An optical reader according to the invention is configured to determine whether an object is in the field of view of the imaging assembly and determining whether features of the specialized symbol are present in the image information.
Claims20
A system for sensing the presence of an object, said system comprising:
- an optical reader including an imaging assembly for outputting image information and a controller in communication with a memory space;
- an object detection symbol disposed a field of view of said imaging assembly;
- determining means responsive to said image information for analyzing said image information and determining therefrom whether said image information represents features of said object detection symbol.
A method for operating a stationary position type optical reader having an imaging assembly and a controller in communication with a memory space, said method comprising the steps of:
- providing an object detection symbol in a field of view of said imaging assembly in an active operating state, capturing image data representing a scene defined by said field of view;
- assessing said captured image data;
- switching operation of said reader to an inactive operating state when said image data indicates that said object detection symbol is in said field of view.
A method for operating a stationary position type optical reader having an imaging assembly and a controller in communication with a memory space, said method comprising the steps of:
- providing an object detection symbol in a field of view of said imaging assembly;
- in an inactive state, developing an electrical representation of a scene defined by said field of view;
- evaluating said electrical representation;
- changing operation of said reader to an active operating state when said electrical representation indicates that at least a portion of said object detection symbol is not in said field of view.
Dependencies are inferred from the claim text.