基于FPGA的车牌识别中值滤波算法的研究与实现

发布时间：2018-03-22 13:23

本文选题：数字图像处理　切入点：FPGA实现　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国经济的高速发展，机动车的数量在不断的增加，相应的加强交通管理也被提到了高度重视的地位上针对此现象，智能交通系统相继产生，作为智能交通系统中重要组成部分的车牌识别也越来越成为研究关注的重点现如今网络技术和多媒体技术已经普遍覆盖，数字图像被广泛地应用到生产生活的各个领域，而数字图像处理技术也成为了信息科学技术中近几十年来发展最为迅速的学科之一本文即是对车牌识别数字图像中值滤波算法的研究为了便于从车牌数字图像中获取更多的信息和改善图像的质量，只是依靠软件实现图像的处理已经无法满足实时高效等需求，同时，伴随着微电子技术的飞速发展，，也使基于各种硬件平台的数字图像处理更具有了优势车牌识别数字图像处理的特点是数据量大处理非常耗时，本文做了基于FPGA上用硬件描述语言来实现图像处理算法的研究首先介绍了数字图像处理的相关知识及算法，描述了直方图均衡化卷积滤波边缘检测等基本原理，并应用Matlab实现了中值滤波算法的仿真然后，对FPGA原理和Quartus开发平台做了详细的介绍最后，选用了快速中值滤波算法，应用FPGA设计了一个三点比较器，运用verilog HDL硬件描述语言实现了中值滤波在FPGA上的逻辑设计和基本算法本文对基于FPGA的数字图像中值滤波算法做出了详细的原理描述程序设计和时序仿真，实现了用硬件描述语言处理数字图像的研究，对基于FPGA的车牌识别数字图像处理系统的研究与实现起到了积极的作用
[Abstract]:With the rapid development of China's economy, the number of motor vehicles is increasing, and the corresponding strengthening of traffic management has also been raised to the status of high attention to this phenomenon, intelligent transportation systems have emerged one after another. As an important part of its, license plate recognition has become the focus of research. Nowadays, network technology and multimedia technology have been widely covered, and digital images have been widely used in various fields of production and life. Digital image processing technology has become one of the most rapidly developing subjects in information science and technology in recent decades. In this paper, the median filtering algorithm of license plate recognition digital image is studied. In order to obtain more information from the license plate digital image and improve the image quality, it can not meet the needs of real-time and efficient image processing only by software. At the same time, with the rapid development of microelectronics technology, It also makes digital image processing based on various hardware platforms more advantageous for license plate recognition. The characteristic of digital image processing is that the large amount of data processing is very time-consuming. In this paper, the hardware description language is used to realize the image processing algorithm based on FPGA. Firstly, the related knowledge and algorithm of digital image processing are introduced, and the basic principles of histogram equalization convolution filtering edge detection are described. Then, the principle of FPGA and the development platform of Quartus are introduced in detail. Finally, the fast median filter algorithm is selected and a three-point comparator is designed with FPGA. The logic design and basic algorithm of median filter on FPGA are realized by using verilog HDL hardware description language. In this paper, the principle description program design and timing simulation of digital image median filter algorithm based on FPGA are made, and the research of digital image processing using hardware description language is realized. It plays a positive role in the research and implementation of the digital image processing system of license plate recognition based on FPGA.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TN791

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