High-precision DSM method for extracting stereoscopic image pair of island without measurement control point

Through the improved semi-global intensive matching algorithm and rational function model for stereo positioning, combined with point cloud preprocessing and triangular network optimization, the accuracy and efficiency problems in the generation of remote islands and reefs are solved, and the generation of high-precision DSM is achieved.

CN120495570AActive Publication Date: 2025-08-15NAVAL UNIV OF ENG PLA
4 Cites 1 Cited by

Patent Information

Application Number
CN202510380162.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-28
Publication Date
2025-08-15
Estimated Expiration
2045-03-28

AI Technical Summary

Technical Problem

It is difficult for the prior art to use traditional aerial photogrammetry to generate high-precision digital surface models (DSMs) of far-sea islands and reefs. Especially when using satellite stereoscopic image pairs, how to achieve high-precision dense matching, solve three-dimensional point clouds, and generate DSMs are still a hot topic and key issue.

Method used

An improved semi-global intensive matching algorithm is used for image matching, a rational function model is used for stereoscopic positioning, and a point cloud preprocessing and DSM reconstruction algorithm are combined, including point cloud dilution and triangular network optimization to generate high-precision DSM.

Benefits of technology

The image matching accuracy and efficiency are improved, a three-dimensional point cloud without deformation is generated, the DSM effect is optimized, and the algorithm operation efficiency and matching accuracy are improved.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a measurement control point-free island stereo image pair extraction high-precision DSM method, which comprises the following steps of: firstly, carrying out semi-global dense matching by adopting a semi-global dense matching algorithm to obtain a disparity map; secondly, performing coordinate three-dimensional positioning of the rational function model, and processing longitude, latitude and height coordinates to obtain a three-dimensional point cloud without deformation; and finally, realizing point cloud reconstruction DSM, and generating a DSM three-dimensional model. Experimental results show that the method for reconstructing the DSM by the high-resolution satellite stereo image pair is well applied to World-View3 satellite images, and the DSM three-dimensional model of the island reef can be constructed.
Need to check novelty before this filing date? Find Prior Art