二维条码技术与应用

Technique and Apptications of Two Dimensional Bar Code

简要比较了二维条码与一维条码的性能，以ＰＤＦ４１７码为例论述了二维条码的优点，着重介绍ＰＤＦ４１７码的编码原理与各项技术，最后介绍了其在国外的应用情况及在我国铁路系统的应用前景．

This article compares two dimension bar codes with one dimension bar codes,discusses the advantages of two dimension codes,introduces the principles and techniqes of PDF417,and finally addresses the application of two dimension bar codes in foreign countries and in China.