The effect of each band of remote sensing images on water edge line extraction is reviewed. The research progress of automatic extraction methods of instantaneous water edge lines based on remote sensing images and GIS technology is reviewed, with an emphasis on the automatic extraction of instantaneous water edge lines using methods such as the fractal theory method. , analyzed the advantages and disadvantages of various methods, looked at future research directions based on their shortcomings, and discussed the application of waterline extraction technology research in offshore aquaculture proliferation. ?
The use of waterline extraction in each band of remote sensing images
In ENVI, the image is first fused and then processed, and the hydrological index is first used to extract water bodies, and then selected The threshold is used for density segmentation to separate water and land. The research results show that the water edge lines extracted using image segmentation technology are continuous, smooth and clear, and achieve good results.
Based on Landsat TM remote sensing images, Matlab and ENVI software are used to extract the sand and water edges of nine sections of the modern Yangtze River estuary area, and explore the practical effects of different research methods to find out a suitable method for extracting water edges. In Matlab, different image segmentation algorithms and edge detection operators are used to extract water edge lines.