Shallow underwater topography construction method integrating hyper-spectral data and sparse sonar data

Abstract

The invention relates to a shallow underwater topography construction method integrating hyper-spectral data and sparse sonar data and belongs to the technical field of underwater topography reconnaissance. According to the shallow underwater topography construction method, dimensions of a hyper-spectral remote sensing image are reduced by aid of a clustering center of sonar data, area division is performed on a low dimensional remote sensing image after dimension reducing, and interpolation is performed on sonar data inside each of the areas to obtain the underwater topography. According to the shallow underwater topography construction method, the hyper-spectral remote sensing image and sparse sonar data are organically combined, in the whole process, and two kinds of data compensate to solve the problem of underwater topography construction well. The remote sensing image and the sonar data are provided with coordinate information after geometric correction, and a certain fuzzy corresponding relation exists between a grayscale of the remote sensing image and the water depth, so that water depth in each depth homogeneous area changes slightly in area-divided remote sensing image, and interpolation results of sonar data are authentic.

Description

technical field [0001] The invention relates to a shallow-water underwater terrain construction method, in particular to an underwater terrain construction method integrating hyperspectral data and sparse sonar data, and belongs to the technical field of underwater terrain surveying. Background technique [0002] Coastal and offshore continental shelf areas are areas where land and sea frequently interact, with superior geographical location, rich resources, and intense human activities. From the perspective of resource development and utilization, the offshore continental shelf is a strategic development base for oil and gas resources, food resources, and shipping resources. For this purpose, coastal protection, harbor construction, tidal flat breeding, energy development, waterway development, cable laying and other engineering facilities are carried out. There is a great need for various accurate and different scale seabed topographic maps. [0003] At present, the acqui...

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Problems solved by technology

[0007] Whether it is a theoretical model based on the radiative transfer equation of visible light in water or a semi-empirical model based on the principle of radiative attenuation of light in water, due to the complex optical properties of water, it is difficult to obtain optical parameter observations, which affects the accuracy of water depth inversion. There are many factors, so the model inversion accuracy is not high

[0008] The statistical model is widely used in water depth inversion because of its simple inversion model and high inversion accuracy, but this method requires a certain amount of measured water depth values, thus restricting the promotion of the model to a certain extent

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