2D coding and decoding barcode and its method thereof
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United States of America Patent
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Mar 3, 2009
Grant Date -
May 24, 2007
app pub date -
Jan 12, 2007
filing date -
Mar 15, 2004
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Abstract
A two-dimensional barcode includes a plurality of macro modules arranged in a two-dimensional array in a spiral sequence, each of macro modules includes a predetermined number of data unit modules for storing data codewords of a predetermined binary stream of bits, a predetermined number of cluster unit modules for storing a predetermined cluster number representing a location of the macro module, and a predetermined number of rim unit modules which possess a predetermined color to form a rim of the macro module. The rim unit modules of two adjacent macro modules are contrasting with each other to enhance identification of the respective macro module.
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