湘南学院 2014 届本科生毕业论文 基于 MATLAB 的数字图像增强方法 李亚斌
目 录
1 绪 论 ..................................................................................................................................1
1.1 研究背景 ........................................................................................................................................1
1.2 课题研究目的和意义 ....................................................................................................................2
1.3 研究内容 .........................................................................................................................................2
2 MATLAB 基本知识介绍 ...............................................................................................................2
2.1 MATLAB 的概述........................................................................................................................2
2.2 MATLAB 产生的历史背景........................................................................................................3
2.3 MATLAB 语言的特点................................................................................................................4
2.4 MATLAB 在图像处理中的应用................................................................................................5
3 数字图像处理的基础知识简介.......................................................................................................6
3.1 什么是数字图像 ............................................................................................................................6
3.2 数字图像处理概述 ........................................................................................................................8
3.2.1 基本概念 .............................................................................................................................8
3.2.2 研究内容 .............................................................................................................................8
3.2.3 基本特点 .............................................................................................................................9
3.2.4 主要应用 ...........................................................................................................................10
3.3 图像处理文件格式 ......................................................................................................................11
3.3.1 MATLAB 图像文件格式 ...............................................................................................11
3.3.2 图像类型 ...........................................................................................................................12
4 利用 MATLAB 增强图像清晰度 ...............................................................................................13
4.1 空域变换增强 ..............................................................................................................................13
4.1.1 增强对比度 ......................................................................................................................13
4.1.2 图像求反 ...........................................................................................................................15
4.2 空域滤波增强 ..............................................................................................................................16
4.2.1 基本原理 ...........................................................................................................................17
4.2.2 线性平滑滤波器 ...............................................................................................................17
4.2.4 线性锐化滤波器 ...............................................................................................................20
4.3 频域增强 ......................................................................................................................................21
4.3.1 基本原理 ...........................................................................................................................21
4.3.2 低通滤波 ...........................................................................................................................21
4.3.3 高通滤波 ...........................................................................................................................23
5 结束语 ..................................................................................................................................................25
参考文献...................................................................................................................................................26
致 谢..........................................................................................................................................................27
