【作者】 王含锁；

【导师】 刘小丹；

【作者基本信息】 辽宁师范大学 ， 计算机应用， 2010， 硕士

【摘要】 条码技术自出现以来,发展十分迅速,极大地提高了数据采集和信息处理速度,为管理的科学现代化做出了巨大贡献。随着条码应用技术的推广,人们对条码的信息容量、安全性、识别率等提出了更高要求。近年来由于彩色印刷设备、采集设备日趋成熟和低成本化,人们在二维条码的基础上加入颜色信息进行扩展,形成了三维条码概念。作为新的信息存储和识别技术,三维条码自诞生起就得到了很多国家的关注。美日等国不仅将其应用于公安、外交、军事等部门的证件管理,还致力于条码新技术的研发和相关标准的制定,希望研制出更大信息量的码型结构以实现进一步应用需求。三维条码在水平和垂直方向上结合模块颜色变化和纵向排列,能在有限的几何空间内表示出更多信息,达到提高信息容量的目的。它是实现信息存储和识别的有效工具,能详细地描述出商品特征。除具备二维条码的基本特征外,三维条码还具备信息容量大、可靠性高、纠错能力强、可记载复杂数据信息,如图像资料等。本文以Data Matrix二维条码为例,通过研究其数据信息的编码生成过程,对条码模块引入颜色信息,在不改变平面空间大小的情况下增加了存储的信息量,实现了能在有限的空间内描述出更多商品信息的要求。并通过实际条码生成的例子,研究如何实现三维条码的生成与识别系统,研究适合实际印刷需要的色彩空间选择方法,设计彩色编码方案。为了更好地实现图像分割效果和提高识别率,提出了面向三维条码图像固定颜色自适应阈值Canny边缘检测算法。并通过一个实验系统验证了该算法的可行性。更多还原

【Abstract】 Since the invention of barcode, it has been developing very quickly and greatly improved the data collection and speed of information process. It has made great contributions to the management of modern science. With the application of barcode technologies, people meet a higher requirement for barcode on its information capacity, security, recognition rate etc. In recent years, with the low cost and mature of color print and acquisition equipments, people put forward a concept of three-dimensional barcode by adding color information to the two-dimensional barcode. As a new technology of information storage and identification, since the birth of three-dimensional barcode many countries pay great attention to it. The United States and Japan not only applied it to the document management of departments, such as public security, diplomatic service, military branches etc, but also committed to the development of new technologies and related standards in order to meet the further requirements of greater amount of information and pattern structure.With the modules color change and vertical arrangement, three-dimensional barcode can express more information in a limited space at the horizontal and vertical directions for the purpose of improving the information capacity. It is an effective tool to achieve information storage and identification and can describe the product features in detail. Besides the basic features of two-dimensional barcode, three-dimensional barcode has many features, such as higher information capacity, great reliability, nice error correction ability, and can record complex data, such as image data.Based on the Data Matrix two-dimensional barcode and by studying the data coding process, we add color information to the module in order to increase the storage of information without changing the flat space and achieve the purpose of describing more product information in the limited space. By actual examples of barcode generation, this article discussed how to achieve the generation and recognition system of three-dimensional barcode, studied the color space selection methods suitable for the actual print, and designed a color coding scheme. A fixed-color adaptive threshold Canny edge detection algorithm based on three-dimensional bar code image is released in order to achieve effective image segmentation and recognition rate. The experiment shows that the algorithm is feasible.更多还原