计算机工程与应用2018，Vol.54Issue(12)：235-239,5.DOI:10.3778/j.issn.1002-8331.1612-0525
利用夜光遥感影像进行城市化监测
Using night-light remote sensing image for urbanization mon-itoring
摘要
Abstract
In this paper, using the urban night light to simulate the distribution and expansion of urban, during the last 21 years in Chengdu and Chongqing area. The night light image processing is divided to three steps:Mutual correction, contrast filter segmentation and gray threshold classification. The urban area is extracted from the image, and the extraction ac-curacy is assessed using area ration method. Through the Geo-Spatial Analyst, combined with the transportation net to monitor the direction and structure of urbanization in Chengdu and Chongqing area, the results show that:(1)The combi-nation of contrast filter segmentation and gray threshold classification improve the accuracy of classification and the An is 0.052.(2)The urban expansion show the different characteristics between Chengdu and Chongqing. Chengdu and adjacent areas mainly presented in Mianyang-Chengdu-Leshan as the main axes, and expansion direction is north-east and south-west, the urban extended range increased significantly from 2003 year. The direction of expansion of Chongqing is north-west and toward Chengdu.(3)The expansion structure of Chongqing is star style. While, Chengdu and its adja-cent area have the ring style, containing the outer ring of Chengdu, Pengzhou-Lezhi-Zhongjiang-Meishan-Dujiangyan and Mianyang-Suining-Neijiang-Zigong-Leshan.关键词
成渝地区/夜光遥感图像/梯度分割/城市化监测Key words
Chengdu and Chongqing region/DMSP/OLS image/contrast filter segmentation/urbanization monitoring分类
信息技术与安全科学引用本文复制引用
王海军,孔祥冬,武克军,张勃,卓壮,任琪..利用夜光遥感影像进行城市化监测[J].计算机工程与应用,2018,54(12):235-239,5.基金项目
四川省教育厅自然科学基金(No.16ZB0402) （No.16ZB0402）
四川乐山市科技局重点基金项目(No.16SZD030) （No.16SZD030）
成都理工大学工程技术学院大学生科技创新项目. （）
