几种常见边缘算子比较及其程序实现.doc

论文题目：专 业：测绘工程 本 科 生： （签名） 指导教师： （签名） 摘 要 图像边缘是图像信息最集中的地方，为了顺利地提取出目标图像的特征点，需要在预处理的过程中所使用的边缘检测方法能检出连续性较好的边缘图像，且对噪声干扰要有一定的抵抗力。传统的经典图像边缘提取算法简单、成熟，计算量小，速度较快，但其对噪声的干扰比较敏感，因而检测效果不是最好，如果结合其他一些算法对一幅含噪声的图像进行预处理，会取得较好效果。本文简要介绍了几个基于Matlab 的图像轮廓提取技术, 如roberts、sobel、prewitt、Laplacian、canny 等边缘检测算子, 比较了这几个边缘检测算子的处理结果，得出各种函数和算子对图像的处理的特点，寻求一种既能协调噪声和提取精度的矛盾, 又具备算法简单,运行速度快的遥感图像边缘提取方法，以便在实际工作中更好地进行其选择。 关键词 图像处理，边缘检测，MATLAB语言 Subject : Several relatively common edge detection and its algorithm Specialty: Geomatics Engineering Name : Qiao Yanhua (Signature) Instructor: Zhang Chunsen (Signature) ABSTRACT Edge image information is the most concentrated areas, in order to successfully extract the characteristics of the target image, the need to pre-treatment process used in the edge detection method can be better detected in the continuity of the edge of the image, and noise interference should be a certain degree of resistance. Classic traditional image edge detection algorithm is simple, mature, calculating the amount of small, fast, but its more sensitive to noise, which is not the best testing results, if combined with some other algorithm with the noise of a pre-processing images will achieve better results. This paper briefly introduces the technology of digital image processing basing on matlab, such as operators of edge detection and thresholding segmentation. Introduce Roberts、sobel、prewitt and canny edge recognition arithmetic operators. Some example and methods of digital image processing are presents. a variety of functions and operators on the handling characteristics of the image for a coordination of noise and extract both the accuracy of the contradictions, also have the algorithm is simple, fast edge detection method of remote sensing images in order to work better in the actual conduct of their choice. Key Words image processing,