Underwater unknown terrain accurate simulation method for U-shaped valley in plateau area
A simulation method and technology of underwater terrain, applied in the field of digital image processing and geospatial information, can solve the problems of unavailable regional underwater terrain monitoring and accurate simulation, large data gaps, etc.
Active Publication Date: 2020-03-27
XUZHOU NORMAL UNIVERSITY
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[0004] Purpose of the invention: Aiming at the problem that the unknown underwater topography of rivers in plateau areas has strong regional and pertinent characteristics, and the data gap area is too large, it is impossible to quickly monitor and accurately simulate the regional underwater topography. Accurate simulation method of underwater unknown terrain in U-shaped valley in plateau area
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[0041] reference figure 1 with figure 2 This embodiment provides an accurate simulation method for the unknown underwater terrain of the U-shaped valley in the plateau area. The theoretical basis is that the glacial erosion valley in the alpine plateau area generally presents a "U"-shaped distribution characteristic, which is similar in the landform feature space. On the basis of similar interpolation simulation, the classification constraint is adopted to interpolate and fill the unknown area of the space. First, based on the optical remote sensing extraction of the submerged area of the river waters, the centerline position of the river is accurately located and calculated; then, the centerline of the river is sampled at equal intervals, and the vertical line of the centerline of the river is drawn and extended at each sampling point. Go to both sides of the river to collect the water elevation information of the river slope; third, combine the drone tilt photogrammetry d...
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The invention discloses an underwater unknown terrain accurate simulation method for a U-shaped valley in a plateau area. The underwater unknown terrain accurate simulation method comprises the following steps: S1, positioning a riverway center line according to optical remote sensing; S2, carrying out local riverway comparison coefficient fitting and river center point elevation estimation through space-air-ground remote sensing information technical means; S3, sampling elevation information of the water slopes on the two sides of the river channel at equal intervals by taking the center lineof the river channel as a reference; and S4, according to the elevation information of the overwater slopes on the two sides of the river channel and the elevation of the central point of the river,segmented underwater terrain adaptive simulation based on slope fitting is carried out. According to the underwater unknown terrain accurate simulation method, transverse slope elevation sampling andlongitudinal center riverway specific descent estimation are adopted, and the underwater unknown terrain of the blocked section of the U-shaped riverway of the plateau is accurately simulated througha parting constraint and Gaussian slope fitting method, and rapid monitoring and accurate simulation of the regional underwater terrain based on a complete remote sensing technical means are achieved.
Description
Technical field [0001] The invention relates to the technical field of geospatial information and the technical field of digital image processing, in particular to a method for accurately simulating the underwater unknown terrain of a U-shaped valley in a plateau area. Background technique [0002] In areas where there is no data and lack of data on plateaus and alpine valleys, once ground traffic and communications are blocked, the only feasible way to obtain data is the integration of sky-ground photogrammetry and remote sensing technology. Accurate underwater terrain data is the basis for the quantitative inversion and estimation of remote sensing lake water storage capacity. However, in reality, most lakes do not have actual data on the shape of lake basins, especially those located in remote plateau and high mountain areas, which poses a huge challenge to the direct estimation of water quantity by remote sensing. At present, the use of photogrammetry and remote sensing tech...
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IPC IPC(8): G06F30/20
CPCY02A90/30
Inventor 朱长明张新王伟胜
Owner XUZHOU NORMAL UNIVERSITY