摘要:本文介绍了数字图像处理的概念及其应用领域、边缘检测研究的背景意义,历史现状,以及边缘检测的一些基本概念。然后,分别对一些经典的边缘检测算子做了介绍,包括Robert算子、Sobel算子、Prewitt算子等,并根据仿真结果比较各自的优缺点及适用性。最后,提出Canny边缘检测算法,以及改进后的Canny算法,用各向异性扩散方程代替高斯滤波,并对扩散后的图像做图像增强。仿真结果表明,改进后的算法得到了比较理想的边缘检测效果。65700
毕业论文关键词: 边缘检测,Canny算法,高斯滤波,非线性滤波
Abstract: This paper introduces the concept and some of the basic concepts of application areas, edge detection research background and significance, historical situation, and edge detection of digital image processing. Then, he introduced the classic image edge detection operator, such as Robert operator, Sobel operator, Prewitt operator, and through theoretical analysis and simulation compare their advantages and disadvantages and applicability. Finally, Canny edge detection algorithm, as well as improved Canny algorithm, instead of using the anisotropic diffusion equation Gaussian filter, and image do after diffusion image enhancement. Simulation results show that the improved algorithm has been ideal edge detection.
Key words: Edge detection,Canny algorithm,Gaussian filter, nonlinear filtering
目录
1 绪论 1
1.1 边缘检测研究的背景及意义 1
1.2 边缘检测研究的历史现状 1
2 边缘检测概念与介绍 2
2.1 图像的概念与介绍 2
2.2 边缘的概念有介绍 2
2.3 梯度的概念与介绍 3
2.4 边缘检测一般流程 3
3 经典边缘检测算法 4
3.1 经典边缘检测的基本算法 4
3.2 常用经典的边缘检测算子 5
3.2.1 Roberts算子 5
3.2.2 Sobel算子 6
3.2.3 Prewitt算子 7
3.2.4 Laplace算子 8
3.3 经典边缘检测方法的仿真结果 9
3.3.1 仿真界面的构建 9
3.3.2仿真结果 10
4 Canny边缘检测算法 13
4.1 canny算子介绍 13
4.2仿真结果及结论 15
4.3本章小结 18
5 基于各向异性扩散方程的Canny边缘检测算法 18
5.1 Canny边缘检测算法步骤 19
5.2 基于各向异性扩散方程的Canny边缘检测算法 19
5.2.1 各向异性扩散方程(Perona-Malik方程) 19
5.2.2 算法的思想 20
5.2.3 算法的具体步骤 21
5.2.4 实验结果 21
5.3 本章小结 22
总结