一种新的基于Laplacian算子的边缘检测方法  

A New Method of Edge Detection Based on the Laplacian Operator

作　　者：任文杰[1] 秦春霞[1] 王欣[1] 贺长伟[2] 

机构地区：[1]山东大学信息科学与工程学院,山东济南250100 [2]山东建筑大学理学院,山东济南250101

出　　处：《电气电子教学学报》2008年第3期33-35,38,共4页Journal of Electrical and Electronic Education

基　　金：山东省自然科学基金重点项目(Z2005G02)

摘　　要：Laplacian算子是二阶微分算子,利用边缘点处二阶导函数出现零交叉的原理检测边缘,对灰度突变敏感,定位精度高,但抗噪性差。本文基于Laplacian算子的边缘检测模型,采用最大/最小中值滤波器,提出一种新的边缘检测方法。实验结果表明该方法具有保护边缘和平滑噪声的优点,边缘检测效果理想。Laplacian operator is a second derivative operator, which can detect the edge by the zero-crossings in the second derivative . The Laplacian operator can detect the intensity abrupt change and get better result in edge localization, but it is sensitive to noise. In this paper, using max/min median filter, a new method based on the Laplacian operator-based edge detection model （EDM） is proposed, which can smooth noise while detecting the edges. Experimental results illustrate that the method has a good noise removing performance and can provide a satisfactory result in detecting edges.

关 键 词：边缘检测 LAPLACIAN算子 LOG算子 最大/最小中值滤波器 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]