A method for seamlessly fusing a tilted real scene three-dimensional model with a DEM

By adjusting the elevation values ​​of the tilted real-world 3D model and the DEM using an energy function optimization algorithm, the problems of inaccurate fusion accuracy and buffer zone in existing technologies are solved, achieving seamless fusion and accuracy assessment, and is applicable to multiple application fields.

CN122435221APending Publication Date: 2026-07-21CHANGJIANG SPATIAL INFORMATION TECH ENG CO LTD (WUHAN)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGJIANG SPATIAL INFORMATION TECH ENG CO LTD (WUHAN)
Filing Date
2026-03-03
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing methods struggle to accurately quantify precision and accuracy when fusing tilted real-world 3D models with DEMs, and require the establishment of a DEM buffer, resulting in poor fusion performance.

Method used

An energy function optimization algorithm is used to smooth the edges of the tilted real-world 3D model, extract the boundary curves and project them onto the DEM surface, construct the energy function, and use the Levenberg-Marquardt algorithm to optimize the elevation values, thus achieving seamless integration.

Benefits of technology

It achieves seamless fusion, preserves model edge features, improves fusion results, and can accurately assess accuracy loss, making it suitable for fusion of models with different levels of accuracy.

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Abstract

The application provides a seamless fusion method of inclined real scene three-dimensional model and DEM, and belongs to the technical field of three-dimensional modeling, and comprises the following steps: performing smoothing treatment on the edge of the inclined real scene three-dimensional model; extracting the boundary curve of the inclined real scene three-dimensional model, and converting the boundary curve into a discrete three-dimensional point set; projecting along the vertical direction to the DEM surface to obtain a point set, and sequentially connecting to obtain a closed polyline; sampling on the DEM with the grid size as the point spacing, and excluding the internal sampling points to obtain a discrete point set; taking the constraint as a constraint to construct an energy function; and adjusting the elevation value through an optimization algorithm to make the energy function approach to the minimum. The application does not need to establish a DEM buffer zone, can completely retain the edge characteristics of the inclined real scene three-dimensional model, realizes the full-area matching fusion of the DEM, can accurately evaluate the precision loss during the fusion while improving the fusion effect, and is suitable for the fusion of the inclined real scene three-dimensional model and the DEM with different precisions.
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