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3D Modeling Method Based on Aerial Photography for Digital Measurement

A technology of 3D modeling and digital measurement, applied in the field of 3D modeling of digital measurement based on aerial photography, it can solve the problems of inability to make full use of the computing platform, inconsistent product accuracy, and different use requirements, so as to improve flexibility and work. Efficiency, avoid duplication of work, reduce the effect of work intensity

Active Publication Date: 2021-04-06
成都坤舆空间科技有限公司
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Problems solved by technology

[0004] The main defect of the existing technical solution is: due to the different requirements for the use of coordinate systems of different units, there may be the same set of aeronautical image data that needs to calculate the real scene model of different coordinate systems;
[0005] According to the technical characteristics of oblique photography, if a large-scale and high-precision real-scene model needs to be produced, the entire aerial survey project will obtain original aerial photograph images with a large amount of data. If it is processed according to the existing scheme, the calculation of different coordinate systems needs to complete the same preparation Work, including: regional division according to the amount of aviation flight data in the survey area, manual extraction of original data of each division's aerial photos, control of each division's control points, etc., resulting in a large workload in the early stage, a lot of repetitive work, and low production efficiency. Unable to make full use of the computing platform, the accuracy of the calculated product results is inconsistent, etc.

Method used

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] A digital measurement three-dimensional modeling method based on aerial photography, based on the WGS84 geocentric coordinate system of the GPS global positioning system, using the KML file created in the digital earth GoogleEarth to divide the range of the measurement area block, through the formulated technical process plan Complete the data conversion of all blocks and different coordinate systems. The specific scheme flow is as follows:

[0023] Step a. Determine the absolute flight altitude of each route according to the grou...

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Abstract

The present invention proposes a digital measurement three-dimensional modeling method based on aerial photography. Based on the WGS84 geocentric coordinate system of the GPS global positioning system, the KML file created in the digital earth GoogleEarth is used to divide the range of the measurement area blocks. The technical process scheme and self-developed auxiliary software complete all block and data conversion of different coordinate systems. The present invention can use different strategies for calculation, and then find the optimal solution from different results, so that the quality of the result is the best; it is convenient and quick, can be quantitatively analyzed, has high precision, can improve work efficiency, and reduce repetitive work and work loss; Be able to solve problems caused by mountainous terrain and avoid mission failure. It solves the problem that the traditional 3D modeling has low efficiency and cannot reflect the real texture well, and solves the problem that the fineness and texture of the established real-scene 3D model are not ideal and require post-processing.

Description

technical field [0001] The invention relates to the field of aerial image measurement, in particular to a three-dimensional modeling method for digital measurement based on aerial photography. Background technique [0002] In order to meet the actual work needs of different industries, the real 3D model requires the corresponding coordinate system or local coordinate system, such as: National Land 2000, Xi'an 80, Beijing 54, etc. [0003] The existing technical solution is to convert the original flight data and control point data into corresponding coordinate system values ​​according to the type of coordinate system to be calculated, and then perform measurement block, data extraction, aerial photo control and model calculation one by one. [0004] The main defect of the existing technical solution is: due to the different requirements for the use of coordinate systems of different units, there may be the same set of aeronautical image data that needs to calculate the real...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/02G01S19/42G06T17/05
CPCG01C11/02G01S19/42G06T17/05
Inventor 赵宏达马海霞
Owner 成都坤舆空间科技有限公司
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