Method and system for realizing full-automatic construction of three-dimensional scene based on two-dimensional data

Abstract

The invention discloses a method and a system for realizing full-automatic construction of a three-dimensional scene based on two-dimensional data. The method specifically comprises the following steps: reading and analyzing various two-dimensional shp data based on GDAL; constructing an initial triangulation network according to the acquired topographic control points and landform line data; calculating elevation values of various types of data; achieving constraint deduction or deletion based on CGAL, and taking the constrained triangulation network as a terrain to construct a three-dimensional model; under OSG technology, creating three-dimensional models of all elements for the green ground, the residential area, the water system, the road surface and the road center line according tovarious data elevation values. The system comprises a shp data reading module, an initial triangulation network construction module, a data elevation value calculation module, a constraint irregular triangulation network construction module and a three-dimensional model construction module. Based on the open source OSG technology and existing two-dimensional data, by reasonable design, full-automatic three-dimensional scene construction is achieved, the cost for achieving necessary functions is saved, and the invention has wider popularization value.

Description

technical field [0001] The invention relates to the field of three-dimensional scene construction, in particular to a three-dimensional scene automatic construction system. Background technique [0002] The related research on the technology of rapid construction of 3D scene has already been carried out at home and abroad and has been put into use. At present, the rapid construction of 3D scenes mainly includes: oblique photography model generation based on UAV technology, 3D laser scanning modeling, SLAM fast scanning modeling, deep learning scene modeling and traditional manual modeling. [0003] The above modeling methods have advantages and disadvantages in different fields. The oblique photography model is generated based on UAV technology. Under the background that UAV technology is becoming more and more mature and stable, it has great advantages for the construction of 3D scenes in a small area. It has high simulation degree and fast production process, but The cos...

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Problems solved by technology

[0003] The above modeling methods have advantages and disadvantages in different fields

Generating oblique photography models based on UAV technology, in the context of the current UAV technology becoming more and more mature and stable, has great advantages in the construction of 3D scenes in a small range, with high simulation and fast production process, but The cost is high, and it is generally only suitable for small-scale modeling. When the scope is large, the cost investment is too large. Moreover, the current domestic legislation on drones is not complete, and it is very easy to have disputes with various confidential units. limitations

Due to its high measurement accuracy, 3D laser scanning technology has been widely used in traditional building digital model construction methods, but it is difficult to be widely used in practical applications due to high engineering cost

SLAM rapid scanning modeling, deep learning scene modeling and other methods have their own shortcomings in terms of cost input, actual effect, and generation range consignment.

[0004] For the automatic construction of large-scale 3D scenes, the real-time effect of texture is generally not high, and it does not need the fine texture details similar to the oblique photography model of the drone, but the physical coordinates of ground objects are relatively demanding. High, current modeling methods are flawed

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