基于二维直方图构建的图像边缘提取算法实现  

Image Edge Extraction Algorithm Based on Two-Dimensional Histogram Construction

作　　者：胡慧琳 舒忠[1] HU Hui-lin;SHU Zhong(Jingchu University of Technology,Jingmen 448000)

机构地区：[1]荆楚理工学院

出　　处：《现代计算机》2019年第26期36-41,60,共7页Modern Computer

摘　　要：针对部分采用一维直方图法和一些改进的二维直方图法,采用阈值法分割图像,实现图像边缘特征提取的算法进行分析,找出这些算法中存在的问题,提出一种基于二维直方图构建确定阈值,并与Canny算子结合的图像边缘提取算法。研究中抓住阈值确定与边缘特征提取两个关键环节,通过对典型的Otsu和MSA等阈值算法进行分析,以一维Rosin算法为基础,通过构建二维直方图,设计以像素灰度值与像素邻域平均灰度值结合的、以阈值权重为参量的阈值选取数学模型;通过对Canny算子具备的图像边缘特征提取占有的优势进行分析,在理论上证明所提出算法的可行性和优越性。通过仿真实验表明,该算法不仅易于实现,还具有较强的实用性,且运算效率较高。This text is about analyzing the algorithms of partial adopting one-dimensional histogram method and some improved two-dimensional his togram method,adopting segment image by threshold method,and achieving the image edge feature extraction to find out the existing prob lems in these algorithms,propose a method of image edge extraction based on two-dimensional histogram,which determines threshold and combines with Canny operator.In the research,two key links are grasped:threshold determination and edge feature extraction.Through the analysis of typical threshold algorithms such as Otsu,MSA,etc.,and basing on one-dimensional Rosin algorithm,through constructing twodimensional histogram,threshold selection mathematical model is designed,which takes threshold weight as parameter and combines pixel gray value with pixel neighborhood average gray value.By analyzing the advantages of Canny operator in image edge feature extraction,the feasibility and superiority of the algorithm which proposed in the text are proved in theory.The simulation results show that the proposed al gorithm is not only easy to implement,but also practical and efficient.

关 键 词：二维直方图 Rosin算法 CANNY算子 阈值权重 图像边缘特征 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]