Three-dimensional geographic scene model construction method and device based on stereoscopic remote sensing image

A scene model and remote sensing image technology, applied in the field of 3D modeling, can solve problems such as difficult 3D scene modeling, difficulty in realizing 3D real geographic scene modeling, loss of elevation data accuracy, etc., to ensure modeling accuracy and realism, High degree of automation and the effect of improving efficiency

Active Publication Date: 2021-10-15
自然资源部国土卫星遥感应用中心
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AI Technical Summary

Problems solved by technology

[0003] However, it is difficult to quickly realize large-scale 3D scene modeling based on the commonly used software platforms such as SkectchUp and 3dMax. Therefore, the existing 3D scene models are mostly built on the scale of digital campuses and digital cities.
Not only that, the traditional modeling method uses the digital elevation model data to generate the gray height. Due to the loss of accuracy of the elevation data in the process, it is difficult to realize the three-dimensional real geographic scene modeling
In addition, for the 3D scene models of the national and even global scales of Digital Earth, due to the massive characteristics of its stereoscopic remote sensing image data sources, how to manage and organize image data and model data is also a current technical bottleneck

Method used

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  • Three-dimensional geographic scene model construction method and device based on stereoscopic remote sensing image
  • Three-dimensional geographic scene model construction method and device based on stereoscopic remote sensing image
  • Three-dimensional geographic scene model construction method and device based on stereoscopic remote sensing image

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Embodiment 1

[0057] Please refer to figure 1 , this embodiment proposes a method for constructing a three-dimensional scene model based on stereoscopic remote sensing images, which can be applied to digital earth-oriented three-dimensional real geographic scene modeling. Exemplarily, the method for constructing a three-dimensional scene model based on stereoscopic remote sensing images includes:

[0058] Step S110, image preprocessing is performed on the collected original satellite remote sensing images to obtain DEM images and DOM images.

[0059] Exemplarily, after obtaining the original satellite remote sensing image data on a national or global scale, this embodiment will use an image preprocessing method to obtain the stereoscopic image data required for modeling, for example, digital elevation model images (hereinafter DEM for short) can provide location coordinates describing ground points and real elevation information representing terrain fluctuations, while digital ortho imager...

Embodiment 2

[0102] Please refer to Figure 8 , this embodiment proposes a virtual reality (VR) three-dimensional scene loading and rendering method, which is applied to the interactive scene of virtual reality, and can realize real-time loading and efficient rendering of massive high-precision three-dimensional scene model resources, and ensures the roaming of three-dimensional geographic scenes. Realism, breaking through the bottleneck of model loading technology due to the limitation of computer memory, etc.

[0103] In this embodiment, based on the pre-built high-precision digital earth-oriented satellite image 3D geographic scene model resources, based on the Unity3D platform, the dynamic loading of the 3D geographic scene model resources in the virtual reality interactive scene is realized. In one embodiment, the high-precision digital earth-oriented satellite image three-dimensional geographic scene model can be constructed by the method described in the above-mentioned embodiment 1...

Embodiment 3

[0141] Please refer to Figure 12 , based on the method of Embodiment 1 above, this embodiment proposes a device 100 for constructing a three-dimensional scene model based on stereoscopic remote sensing images. Exemplarily, the device includes:

[0142] A preprocessing module 110, configured to perform image preprocessing on the collected original satellite remote sensing images to obtain digital elevation model images and digital orthophoto images;

[0143] The tile segmentation module 120 is used to slice the digital elevation model image and the digital orthophoto according to the preset image slicing rules to obtain several digital elevation model image tiles and several digital orthophotos with corresponding row and column numbers respectively. Orthophoto tiles, each of the digital elevation model image tiles includes several pixels with real elevation values, and each of the digital orthophoto tiles includes the landform texture of the corresponding pixel;

[0144] The ...

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Abstract

The embodiment of the invention provides a three-dimensional geographic scene model construction method and device based on a stereoscopic remote sensing image. The method comprises the following steps: carrying out image preprocessing on an original satellite remote sensing image, and acquiring a digital elevation model image and a digital orthoimage; conducting slicing according to a preset image slicing rule to obtain a digital elevation model image tile and a digital orthoimage tile; establishing a three-dimensional terrain model by using a triangulated irregular network construction technology, and mapping landform texture to the three-dimensional terrain model based on a texture coordinate mapping technology to obtain a partitioned three-dimensional geographic scene model; and finally, storing the partitioned three-dimensional geographic scene model according to tile row and column numbers to obtain a three-dimensional geographic scene model corresponding to the original three-dimensional satellite remote sensing image. Compared with a traditional modeling method, the technical scheme of the invention has the advantages of large modeling scale, high efficiency and high automation degree, and greatly improves the model construction efficiency and the like while ensuring modeling precision and the sense of reality.

Description

technical field [0001] The present application relates to the technical field of three-dimensional modeling, in particular to a method and device for constructing a three-dimensional geographic scene model based on three-dimensional remote sensing images. Background technique [0002] With the introduction of the concept of digital earth, the use of multi-resolution, multi-temporal multi-source earth observation data and socio-economic data to construct a virtual earth has become a current technology hotspot. Photogrammetry technology can obtain not only the elevation information of the ground, but also the texture features of the landform by carrying multi-view sensors on the aircraft and imaging from multiple angles such as vertical and oblique. In recent years, high-resolution optical satellite remote sensing technology has been developed, and the acquired images have higher precision after radiation and geometric correction, which can provide an important data source for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05G06T15/00
CPCG06T17/05G06T15/005G06T2200/04
Inventor 甘宇航唐新明罗征宇刘克雷兵尤淑撑于淼
Owner 自然资源部国土卫星遥感应用中心
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