Global glacier search recognition method based on remote sensing cloud computing
An identification method and cloud computing technology, applied in the field of remote sensing target identification, can solve problems such as increasing the difficulty of accurate identification of glaciers
Active Publication Date: 2022-01-14
HENAN UNIVERSITY
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These factors add to the difficulty of accurately identifying glaciers
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[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0035] Such as figure 1 As shown, the embodiment of the present invention provides a global glacier search and identification method based on remote sensing cloud computing, and the specific steps are as follows:
[0036] S1. Use the remote sensing cloud platform (Google Earth Engine) to collect 5 optical satellite images in the summer time range of 2021. These 5 optical satellite images have the same number of rows and columns of pixels, and preprocess the op...
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The invention provides a global glacier search and recognition method based on remote sensing cloud computing, which comprises the following steps of: acquiring a surface reflectance image of a summer optical satellite image through a cloud computing platform, and acquiring spectral information of glacier and other ground objects by utilizing spectral acquisition software; analyzing the difference between the glacier spectrum and other ground feature spectrums, and determining an effective spectrum band for identifying the glacier and a threshold value thereof; constructing a glacier index algorithm, and determining a threshold value of a glacier index to distinguish glaciers from non-glaciers; calculating a glacier index image of each satellite image in summer in the research area based on a glacier index algorithm, and then obtaining a median synthesis image of the summer glacier index images by adopting a median synthesis algorithm; and constructing a glacier automatic recognition model by using the effective spectral band of the glacier, the threshold thereof, the glacier index median synthesis image and the threshold thereof, and realizing remote sensing automatic recognition mapping of glacier distribution. According to the glacier remote sensing recognition model, remote sensing accurate and automatic recognition of global glacier distribution can be realized.
Description
technical field [0001] The invention relates to the technical field of remote sensing target recognition, in particular to a global glacier search and recognition method based on remote sensing cloud computing. Background technique [0002] Under the background of global climate change, the distribution of glaciers presents significant interannual variation characteristics. Timely and effective updating of glacier distribution data on a global scale is of great scientific value to the study of the interaction between climate change and the ecological environment. Both glaciers and clouds appear white in the visible light range, and show similar visible light spectral signatures in optical satellite imagery. The spectral signature of glaciers covered by cloud shadows on optical satellite images also changed significantly. These factors add to the difficulty of accurately identifying glaciers. Coupled with the characteristics of wide distribution and large interannual chang...
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IPC IPC(8): G06V20/13G06V10/60G06T5/50
CPCG06T5/50G06T2207/10032G06T2207/30181G06T2207/20221Y02A90/10
Inventor 田海峰罗德文秦耀辰王帅杨梦丹
Owner HENAN UNIVERSITY