An edge detection method based on the Sobel and K-means

Q4 Physics and Astronomy

光学技术 Pub Date : 2014-01-01 DOI:10.3788/GXJS20144005.0394

杨. Y. Kun, 张明鑫 Zhang Mingxin, 先晓兵 Xian Xiaobing, 郑金龙 Zheng Jinlong, 聂盼红 Nie Panhong

引用次数: 1

Abstract

The result of the image processed by traditional edge detection operator is an edge sharpening gradient image.In order to get the binary edge image,it requires determining the threshold artificially.The loss of edge information is caused.So it uses the Sobel operator with increase convolution mask to get the gradient image.The threshold value through the steps K-means algorithm based on gradient histogram is got,the binary edge image is obtained by segmenting gradient image which uses the acquired threshold value,the edge is thinned and connected.The Otsu algorithm is used to check the correctness ofthreshold value and different edge detection approaches are compared with improved method.It obtains reasonable threshold value and has a better performance than improved Sobel operator and the result is close to Canny operator with optimal threshold.It can be applied in the field of machine vision.

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基于Sobel和K-means的边缘检测方法

传统的边缘检测算子对图像进行处理后得到的是边缘锐化梯度图像。为了得到二值边缘图像，需要人为地确定阈值。导致边缘信息丢失。因此，采用带增加卷积掩模的Sobel算子得到梯度图像。通过基于梯度直方图的步长k均值算法得到阈值，利用获得的阈值对梯度图像进行分割得到二值边缘图像，对边缘进行薄化连接。采用Otsu算法检验阈值的正确性，并对不同边缘检测方法进行了比较。该方法获得了合理的阈值，比改进的Sobel算子具有更好的性能，其结果接近具有最优阈值的Canny算子。它可以应用于机器视觉领域。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

光学技术 Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

0.60

自引率

0.00%

发文量

6699

期刊介绍： The predecessor of Optical Technology was Optical Technology, which was founded in 1975. At that time, the Fifth Ministry of Machine Building entrusted the School of Optoelectronics of Beijing Institute of Technology to publish the journal, and it was officially approved by the State Administration of Press, Publication, Radio, Film and Television for external distribution. From 1975 to 1979, the magazine was named Optical Technology, a quarterly with 4 issues per year; from 1980 to the present, the magazine is named Optical Technology, a bimonthly with 6 issues per year, published on the 20th of odd months. The publication policy is: to serve the national economic construction, implement the development of the national economy, serve production and scientific research, and implement the publication policy of "letting a hundred flowers bloom and a hundred schools of thought contend".