System and method for reducing motion sensitivity in an imager based optical code reader
AssigneeSymbol Technologies, Inc.
InventorEdward Barkan
Life of this patent
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Abstract
A system and method for reading an optical code is provided. The method comprises the steps of sensing incident light reflected from a target optical code to be imaged; generating an image signal including a plurality of electrical signals corresponding to the sensing; generating information relating to an amplitude of the image signal; and generating a control signal for adjusting an exposure time during the sensing in accordance with the information relating to the amplitude for minimizing sensitivity to motion.
Claims19
An optical code reader system comprising:
- a photo sensor module for imaging a target optical code including sensing incident light and generating an image signal including a plurality of electrical signals corresponding to the sensing;
- a shutter module having an adjustable shutter that controls exposure time of the photo sensor module in accordance with an exposure time setting;
- a processor assembly having at least one processor receiving information relating to an amplitude of the image signal;
- and
- an exposure control module executable on the at least one processor for generating a control signal for adjusting the exposure time setting for controlling the adjustable shutter in accordance with the information relating to the amplitude.
A method for reading an optical code comprising the steps of:
- sensing incident light reflected from a target optical code to be imaged;
- generating an image signal including a plurality of electrical signals corresponding to the sensing;
- generating information relating to an amplitude of the image signal;
- and
- generating a control signal for adjusting an exposure time during the sensing in accordance with the information relating to the amplitude.
A method for adjusting exposure time of an optical code reader comprising the steps of:
- providing for retrieving information related to an amplitude of an image signal;
- providing for evaluating the information related to the amplitude of the image signal;
- and
- providing for generating a control signal for setting an exposure time for acquiring a subsequent image signal in accordance with the evaluated information related to the amplitude.
A computer readable medium storing a set of computer readable instructions capable of being executed by at least one processor for adjusting exposure time of an optical code reader, the readable instructions comprising:
- means for retrieving information related to an amplitude of an image signal;
- means for evaluating the information related to the amplitude of the image signal;
- and
- means for generating a control signal for setting an exposure time for acquiring a subsequent image signal in accordance with the evaluated information related to the amplitude.
Dependencies are inferred from the claim text.