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Mobile terminal high-precision oblique photography three-dimensional modeling method based on OpenGL

A technology of oblique photography and 3D modeling, which is used in 3D modeling, image enhancement, instruments, etc. It can solve the problem that high-precision oblique photography models cannot be loaded on a large scale, eliminate the influence of aircraft attitude and terrain fluctuations, and improve accuracy. , the effect of model accuracy improvement

Active Publication Date: 2019-06-25
LUDONG UNIVERSITY
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a mobile terminal high-precision oblique photography three-dimensional modeling method based on OpenGL; mainly solve the problem that the existing high-precision oblique photography model cannot be loaded to mobile devices on a large scale

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  • Mobile terminal high-precision oblique photography three-dimensional modeling method based on OpenGL
  • Mobile terminal high-precision oblique photography three-dimensional modeling method based on OpenGL
  • Mobile terminal high-precision oblique photography three-dimensional modeling method based on OpenGL

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Embodiment 1

[0052] Example 1, see figure 1 , 2 , 3, 4; the image is corrected for the center image point, and the filter removes the noise step, see the image correction method in the present invention figure 1 :

[0053] First, the area to be measured is acquired by drones with 60% overlap rate image data, and the drones are equipped with five-lens cameras. Due to the influence of aircraft attitude, terrain fluctuations, and noise, the acquired image data needs to be corrected and imaged. Transformation; each piece of image data obtained at this time has the coordinates of the center point, recording the longitude and latitude of the drone when shooting the area;

[0054] Use the outer orientation elements of each image data combined with the affine transformation formula to calculate the offset of the center point of the image, and calculate the correct center point based on the offset of the center point; improve the accuracy of the oblique photographic model, and the accuracy of the...

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Abstract

The invention discloses a mobile terminal high-precision oblique photography three-dimensional modeling method based on OpenGL, and belongs to the field of surveying and mapping engineering and computer combination. The method comprises the steps of firstly utilizing an unmanned aerial vehicle oblique photography technology; image data with spatial position information in a to-be-detected area arerapidly obtained; performing geometric correction on the image, performing oblique photography model batch processing on the corrected image data to generate model data, performing LOD classificationon the generated model data, performing data compression on the generated model data, merging adjacent nodes, and finally dynamically loading the model at a mobile terminal based on an OpenGL technology. The oblique photography technology and the mobile technology are combined, large-batch loading of high-precision oblique photography models at the mobile end can be achieved, loading and browsingof oblique photography measurement three-dimensional digital cities at the mobile end can be achieved, and certain social benefits and economic benefits are achieved.

Description

Technical field: [0001] The invention relates to the technical field of surveying and mapping and digital earth model rendering, in particular to an OpenGL-based high-precision oblique photography three-dimensional modeling method for mobile terminals. Background technique: [0002] The Java programming language has a complete ecological chain, has the characteristics of safety, efficiency, and cross-platform operation, and is widely used in the field of mobile applications. Taking advantage of Java's advantages in the field of mobile applications, the SFML library bound to OpenGL packaged in java3d used in eclipse has become a hotspot for developers who build 3D digital city models, digital globes, and digital cities. With the development of oblique photogrammetry technology, the current digital city has begun to use this realistic, highly automated model that is similar to real objects on a large scale. Compared with traditional manual modeling of digital campuses and dig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T5/00
Inventor 曹兴文吴孟泉王涛吴晶崔青春魏兴华梅宇骜伯英杰宋媛曹煜周洁贾馨仝永慧
Owner LUDONG UNIVERSITY
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