条形码的准确性
Accuracy of barcodes
在书籍（例如“移动设备条码”）中，ISBN 978-0-521-88839-4), Papers (e.g. "Bar Codes May Have Poorer Error Rates Than Commonly Believed", DOI: 10.1373/clinchem.2010.153288) or websites给出了有关条码准确性或错误率的信息。
给定的数字因人而异。 Code39 从 170 万分之一错误，300 万分以上错误到 450 万分之一错误。
这些数字从何而来，如何计算（例如 Code39）？
在Code39的定义里ISO/IEC 16388:2007我也没找到有用的资料
达到 barcodefaq site you linked to and click on the Barcode type e.g. UPC，您将获得一份解释所用方法的 PDF。引用的文章解释了遇到的错误并包含指向更多信息的链接。
这些数字所描述的“错误率”是读取错误率，即条码在扫描时被错误读取的频率。为了使条码有用，这需要一个非常低的值，因此读取错误率较低的条码格式可能更好（尽管还涉及其他因素）。
这些数字大概是通过科学测试确定的。在您 link 访问的网站中，进一步 link 到 a study by Ohio University 描述了他们使用的方法，这是如何完成此操作的示例：
An automated test apparatus was constructed and used for the test. The apparatus included a robot which loaded carrier sheets onto oscillating stages that were moved under four fixed mounted, “hand held” moving beam, visible laser diode bar code scanners. Scanner output was a series of digital pulses. Decoding of all symbols was performed in a computer using software programs based on standard reference decode algorithms. Each symbol was scanned by
each scanner until 283 decodes were obtained. [...] An error occurred and was recorded whenever the decoded data did not match the encoded data for a given symbol.
在书籍（例如“移动设备条码”）中，ISBN 978-0-521-88839-4), Papers (e.g. "Bar Codes May Have Poorer Error Rates Than Commonly Believed", DOI: 10.1373/clinchem.2010.153288) or websites给出了有关条码准确性或错误率的信息。
给定的数字因人而异。 Code39 从 170 万分之一错误，300 万分以上错误到 450 万分之一错误。
这些数字从何而来，如何计算（例如 Code39）？
在Code39的定义里ISO/IEC 16388:2007我也没找到有用的资料
达到 barcodefaq site you linked to and click on the Barcode type e.g. UPC，您将获得一份解释所用方法的 PDF。引用的文章解释了遇到的错误并包含指向更多信息的链接。
这些数字所描述的“错误率”是读取错误率，即条码在扫描时被错误读取的频率。为了使条码有用，这需要一个非常低的值，因此读取错误率较低的条码格式可能更好（尽管还涉及其他因素）。
这些数字大概是通过科学测试确定的。在您 link 访问的网站中，进一步 link 到 a study by Ohio University 描述了他们使用的方法，这是如何完成此操作的示例：
An automated test apparatus was constructed and used for the test. The apparatus included a robot which loaded carrier sheets onto oscillating stages that were moved under four fixed mounted, “hand held” moving beam, visible laser diode bar code scanners. Scanner output was a series of digital pulses. Decoding of all symbols was performed in a computer using software programs based on standard reference decode algorithms. Each symbol was scanned by each scanner until 283 decodes were obtained. [...] An error occurred and was recorded whenever the decoded data did not match the encoded data for a given symbol.