2D bar code 二维条码
The content of the thesis can be described as following:Firstly, the thesis describes 1D bar code and 2D bar code, including coding method, recognizing method, and several kinds of main bar codes.
本论文论述主要过程如下：首先，简要介绍了一维条形码和二维条形码的相关知识，包括条形码重要参数，条形码编码方式、条形码识别方法以及重要的条形码。
参考来源 - 1.5维条形码生成与识别系统的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Methods that 2D-bar code uses in information hiding technology are given and translating information by PDF417 code is realized to make communication information more security.
介绍了二维条码符号表示及纠错码生成，给出二维条码用于信息隐藏技术的方法和途径，实现了用PDF417码传送信息，使通信信息更安全。
On the back of the card, a 2d bar-code along with a regular one and a magnetic stripe triplicate all the information on the front.
在卡背面，2d条形码，普通码和磁条将所有信息三重储存在卡正面。
This is a 2d plotting library for data visualization, and is used in some of the book's code samples that produce line graphs and bar charts.
这是一个用于数据可视化的2d绘图库，本书在一些程序例子中用到该库用于产生曲线图和柱状图。
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