基于Canny算子的南通江海岸线研究  

Study on Nantong coastlines based on Canny operator

作　　者：蒋科迪 殷勇[1] 范开桂 张凌 JIANG Kedi;YIN Yong;FAN Kaigui;ZHANG Ling(The Key Laboratory of Coast and Island Development of Ministry of Education,School of Geography and Ocean Science,Nanjing University,Nanjing 210046,China;College of Oceanography,Hohai University,Nanjing 210098,China)

机构地区：[1]南京大学地理与海洋科学学院海岸与海岛开发教育部重点实验室,江苏南京210046 [2]河海大学海洋学院,江苏南京210098

出　　处：《测绘通报》2019年第10期83-88,共6页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金(40776023)

摘　　要：基于RS、GIS、Matlab等技术与平台提取遥感影像岸线是当前实现海岸动态监测和分析各类型海岸动力地貌演化的重要技术方法。本文选取江苏南通江海岸带为研究区,对多期预处理后的MSS、TM和OLI影像进行卷积滤波、图像分割等处理;然后使用Matlab,基于Canny算子检测图像边缘,提取了多期影像的瞬时水边线。与此同时,结合不同类型海岸目视解译标志和吕四港近5 a潮汐数据矫正提取瞬时水边线,最后提取南通市4期江海岸线并分析了近45 a来南通江海岸线演变特性。Based on RS,GIS,Matlab and other platforms,the extraction of shoreline from remote sensing images is an important technical method to realize dynamic monitoring and analysis of various types of coastal dynamic geomorphological evolution.In this study,the coastal zone of Nantong,Jiangsu province is selected as the research area.Based on RS platform,the images of MSS,TM and OLI after multi-stage preprocessing are processed by convolution filtering and image segmentation.Then,using Canny operator to detect the image edge and extract the instantaneous water line of these multi-stage images.At the same time,the instantaneous water boundary is extracted combining with different types of coastal visual interpretation signs and tidal data correction over the past five years in Lvsi Port.Based on GIS platform,this study finally extracts four times coastlines and analyses the erosion and deposit evolution of them in recent 45 years in Nantong.

关 键 词：遥感岸线提取 瞬时水边线 CANNY算子 蚀淤变化 

分 类 号：P237[天文地球—摄影测量与遥感] P229[天文地球—测绘科学与技术]