摘要假币是如今社会深受困扰的一个顽疾,能够对纸币进行高可靠性的辨伪具有极重要的意义。由于传统的验钞仪器已经逐渐分辨不出频频涌现的高仿假币，故本论文以图像处理为基础，创新地开发了一种基于深层防伪技术的真伪币识别技术。
本论文先对假币、防伪特征和国内真伪币识别研究现状进行介绍，再引出本论文所开发的辨伪技术。由于真币背面印刷的红外油墨图案在红外线照射下会消失，依此原理，首先在暗室里利用红外线照射纸币，再采集视频资料。然后以MATLAB作为工具进行图像分割、图像增强、二值化处理。最后分别计算真假币背面图像上特定区域里所有像素点灰度值之和，选择出判定阈值。将待测纸币该区域内灰度值之和同该阈值进行比较，从而判定真伪币。26417
关键词  图像处理  红外油墨  MATLAB 
毕业论文设计说明书外文摘要
Title  The research based on the deep anti-counterfeiting technology of identifying the authenticity of note
Abstract
Nowadays counterfeit note is a deeply troubled social ills ,and it is of great significance to be capable of identifying the authenticity of note with high reliability .Since the conventional paper money detector gradually has difficulty distinguishing the emerging high imitation counterfeit note ,a technology based on the deep anti-counterfeiting technology of identifying the authenticity of note is developed out of innovation in the paper.
  In the beginning ,counterfeit note、security features and the current internal technology of identifying the authenticity of note are introduced ,then the developed technology comes .The backside pattern of the real note is printed by infrared ink ,and it will disappear when in the infrared ink ,which is served as principle .Firstly the note is irradiated by the infrared light in darkroom and the video is captured .Then MATLAB is used to finish the image segmentation、image enhancement and binary processing . At last ,the gray value of all pixels in a specific area on the back of the image is calculated ,both of real and counterfeit note ,and the threshold value is selected .The sum of the gray value of the area of the detected note is compared to the threshold ,then the authenticity is known .
Keywords  image processing    infrared ink    MATLAB
目   录
1    引言    1
1.1    研究背景    1
1.2  研究意义和目的    2
1.3    国内真伪币识别技术研发现状    3
1.4  基于深层防伪技术的真伪币识别技术的设计原理    6
1.5  论文章节安排    7
2    基于深层技术的真伪币识别技术介绍    8
2.1  主要流程    8
2.2  硬件和软件部分介绍    8
2.3  图像采集    9
3  真伪币红外图像分析与处理    12
3.1  图像剪切    12
3.2  图像增强    16
3.3  二值化处理    22
4  真伪币判定    25
4.1  判定区域范围的确定    25
4.2  阈值选取与判定    27
结 论    28
致 谢    30
参考文献31
1    引言
1.1    研究背景
人之社会，源远流长。从只认穴居而生、薅毛生食的原始人，到如今衣冠楚楚，言行优雅的现代人，正是无数个或偶然或必然的改变使我们幸而拥有了如今的生活。但无可辩驳的一点是，交易的出现在极大程度上加速了文明车轮的前行。不必谈原始年代里的物物交换，自货币作为一个文明的符号步入到人们的生活中以来，它也经历了从金银等耐磨贵重金属到纸币的转变。然而不幸的是，假币的存在给人类社会抹上了一层挥而不去的阴影。发展到如今，假币大致分为以下两种类别[1]： MATLAB基于深层防伪技术真伪币识别技术研究:http://www.youerw.com/tongxin/lunwen_20600.html