Study on Nantong coastlines based on Canny operator

doi:10.13474/j.cnki.11-2246.2019.0323

Abstract

Abstract: 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.

Key words: remote sensing coastline extraction, instantaneous waterline, Canny operator, erosion and deposit evolution

CLC Number:

P237
P229

JIANG Kedi, YIN Yong, FAN Kaigui, ZHANG Ling. Study on Nantong coastlines based on Canny operator[J]. 测绘通报, 2019, 0(10): 83-88.

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