Hand-supported imaging-based bar code symbol reader employing a multi-mode image-processing based bar code reading subsystem with modular image-processing architecture
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United States of America Patent
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Jul 3, 2007
Grant Date -
May 19, 2005
app pub date -
Jul 22, 2004
filing date -
Nov 13, 2003
priority date (Note) -
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Abstract
A hand-supportable digital imaging-based bar code symbol reading device comprises: an IR-based object presence and range detection subsystem; a multi-mode area-type image formation and detection subsystem having narrow-area and wide area image capture modes of operation; a multi-mode LED-based illumination subsystem having narrow-area and wide area illumination modes of operation; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; a multi-mode image-processing bar code symbol reading subsystem; an input/output subsystem; a manually-activatable trigger switch; and a system control subsystem integrated with each of the above-described subsystems. The multi-mode image-processing based bar code reading subsystem has a modular image-processing architecture constructed from four major image processing modules, namely: a tracker module, a finder module, a marker module, and a decoder module. These image processing modules enable the multiple modes of operation of the multi-mode image-processing based bar code reading subsystem.
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