Method and apparatus for decoding two-dimensional bar code using CCD/CMD camera
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United States of America Patent
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Jun 7, 1994
Grant Date -
N/A
app pub date -
Mar 16, 1992
filing date -
Mar 16, 1992
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for decoding a two-dimensional bar code symbol using a charge-coupled device (CCD) camera or a charge-modulation device (CMD) camera. The CCD/CMD camera takes pictures of the symbol and the picture is converted into digital data. The location and orientation of the two-dimensional bar code symbol is determined and verified. Defects and damages on the symbol are detected and corrected. The symbol is scanned to read the codewords of the two-dimensional bar code symbol.
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