1、 本科毕业设计本科毕业设计 题 目 基于 MATLAB 的图像去噪的研究 学生姓名 专业名称 通信工程 指导教师 2015 年 5 月 14 日 教学单位 学生学号 编 号 I 基于基于 MATLABMATLAB 的图像去噪的研究的图像去噪的研究 摘摘 要要 在智能手机越发普及的今天，信息已经从简单的文字变为更直观的图像。但是 数字化的图像也面临诸多问题，因生成、传输时产生的噪声就是图像致命的杀手。 怎样去除噪声成为了当今数字图像领域中一个重要的研究课题。其处理程度的优 劣直接决定了后续的图像处理工作的好坏。 在本文中，第一部分介绍了图像处理的意义和现状。第二部分介绍了 MATLAB 这 款软
2、件和本文用到的几种算法的原理。第三部分着重研究并分析了三种常用的去 噪方法并对一张图片进行了去噪仿真，得出了线性滤波中的均值滤波可用来抑制 高斯噪声，非线性滤波中的中值滤波可用来处理椒盐噪声，维纳滤波也同样可用 来处理高斯噪声的结论。第四部分对结论的分析看出此三种方法滤噪的弊端，因 此对新兴技术小波滤噪中的阈值和极大值两种算法做了研究。得出极大值滤噪虽 有较好效果但其算法较复杂，小波阈值法算法简单，选基灵活实用性广，对高斯 和椒盐噪声效果均比较理想的结论。最后再对全文做出总结，对比几种仿真结果。 关键词关键词：图像去噪，维纳滤波，小波阈值。 II The study of the image
3、denoising based on MATLAB Abstract In todays smartphones is increasingly, from simple text information has became more intuitive image. But the digital image is also facing many problems, because of the noise emitted by generation and transmission is the image of deadly killer. How to get rid of the
4、 noise has become a current in the field of digital image is an important research topic. The degree of its processing directly determines the subsequent image processing work of good or bad. In this article, the first part introduces the significance and status quo of image processing. The second p
5、art introduces the software MATLAB and the principle of several kinds of algorithm used in this paper. The third part of this paper studies and analyzes three kinds of common denoising method and the image denoising simulation, concluded that the average filtering can be used in the linear filter to
6、 suppress gaussian noise, median filtering of nonlinear filtering can be used to deal with salt and pepper noise, wiener filtering is also available to deal with the conclusion of gaussian noise. The fourth part analysis of the conclusion that the disadvantages of the three ways to filter the noise, so for the emerging technology of wavelet denoising threshold and the maximum two algorithm to do the res
