目 录
1 引 言 .......................................................................................................................................1
1.1 图像及其特点 .......................................................................................................................1
1.2 图像的文件格式 ...................................................................................................................1
1.3 数字图像处理 ......................................................................................................................5
1.3.1 数字图像处理概述 .......................................................................................................5
1.3.2 数字图像处理发展概况 ...............................................................................................5
1.3.3 数字图像处理主要研究内容 ........................................................................................6
1.3.4 数字图像处理的基本特点 ...........................................................................................7
1.3.5 数字图像处理的优点 ....................................................................................................8
1.3.6 数字图像处理的应用 ...................................................................................................8
1.4 图像锐化的研究背景 ........................................................................................................10
1.5 研究图像锐化的目的和注意事项 .....................................................................................10
1.6 本文内容的安排 .................................................................................................................10
2 图像锐化 .................................................................................................................................11
2.1 微分法 ................................................................................................................................11
2.1.1 梯度法（Gradieut） ...................................................................................................11
2.1.2 Sobel 算法 ....................................................................................................................13
2.1.3 LOG 算子 .....................................................................................................................14
2.2 拉普拉斯算子 ....................................................................................................................14
2.3 高通滤波法 ........................................................................................................................15
2.3.1 空间域高通滤波 .........................................................................................................15
2.3.2 频率域高通滤波 .........................................................................................................16
2.3.3 统计差值法(用于勾边处理).......................................................................................17
2.4 MATLAB 中如何实现图像锐化 .......................................................................................17
2.5 总结 ....................................................................................................................................18
3 锐化的边缘检测法与锐化算子 .............................................................................................19
3.1 边缘检测法 .........................................................................................................................19
3.1.1 梯度算子 .....................................................................................................................19
3.1.2 梯度算子在 MATLAB 中的实现 ..............................................................................20
3.2 拉普拉斯算子 .....................................................................................................................21
3.3 边缘连接方法 ....................................................................................................................21
3.4 边缘检测的 MATLAB 实现方法 .....................................................................................22
3.5 MATLAB 的实现程序如下 ...............................................................................................23
3.6 结论 ....................................................................................................................................23
4 MATLAB 简介及 GUI 设计 ..................................................................................................24
4.1 MATLAB 简介 ...................................................................................................................24
