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    • 38. 发明授权
    • Method and apparatus for decoding bar code symbols using ratio analysis
of module size
    • 使用模块尺寸比率分析对条形码符号进行解码的方法和装置
    • US5767497A
    • 1998-06-16
    • US759402
    • 1996-12-04
    • Ming Lei
    • Ming Lei
    • G06K7/10G06K7/14
    • G06K7/1486G06K7/14
    • A method and apparatus for decoding bar code symbols using an analysis of the ratios of the module size for the bars and spaces of the bar code. The invention is applicable to any bar code having one or more nominal widths in the bars and spaces, and is particularly useful in bar codes having multiples widths in the specification for the bar code and in situations where the bar code signal has a low signal-to-noise ratio, or is degraded because of a damaged, smudged, or dirty bar code, or where the bar code is read at less than the optimum angle. The invention identifies mis-decoded characters and uses adaptive techniques to decode characters previously non-decodable or mis-decoded by standard methods, thereby improving the decode rate as compared to prior techniques. The decoding rate is improved without having to re-scan the bar code for a new signal, thereby making the invention particularly useful for high-speed or one-pass decoding operations.
    • 使用对条形码的条形和空格的模块尺寸的比率的分析来解码条形码符号的方法和装置。 本发明适用于在条形和空格中具有一个或多个标称宽度的任何条形码,并且特别适用于在条形码规范中具有倍数宽度的条形码,并且条形码信号具有低信噪比的情况下, 或者由于损坏,污迹或脏的条形码,或条形码在小于最佳角度读取的条件下降低。 本发明识别错误解码的字符并且使用自适应技术来解码先前不可解码或通过标准方法错误解码的字符,从而与现有技术相比提高了解码速率。 解码速率得到提高,而不需要重新扫描新信号的条形码,从而使本发明对于高速或一次解码操作特别有用。