Hand-supportable digital image-processing based bar code symbol reading system employing image cropping zone (ICZ) framing and post-image capture cropping
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United States of America Patent
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Aug 4, 2009
Grant Date -
Jun 12, 2008
app pub date -
Dec 3, 2004
filing date -
Nov 13, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of reading bar code symbols comprising the steps of: (a) projecting an image cropping zone (ICZ) framing pattern within the FOV of an image sensing array during wide-area illumination and image capturing operation; (b) visually aligning an object to be imaged within the ICZ framing pattern; (c) forming and capturing an wide-area image of the entire FOV, which spatially encompasses the ICZ framing pattern aligned about the object to be imaged; (d) using automatic software-based image cropping algorithm to automatically crop the pixels within the spatial boundaries defined by the ICZ framing pattern, from those pixels contained in the entire wide-area image frame captured during step (c); and (e) automatically decode processing the image represented by the cropped image pixels in the ICZ framing pattern so as to read a 1D or 2D bar code symbol graphically represented therein.
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