Digital measurement three-dimensional modeling method based on aerial photography

Abstract

The invention provides a digital measurement three-dimensional modeling method based on aerial photography. On the basis of a WGS84 geocentric coordinate system of a GPS, the range of measurement areablocks is divided by using a KML file created in digital earth GoogleEarth, and data conversion of all the blocks and different coordinate systems is completed through a formulated technical processscheme and independently developed auxiliary software. Different strategies can be used for performing calculation, and then an optimal solution is found from different results, so that the result quality is higher; the convenience and quickness are achieved, the quantitative analysis can be performed, the precision is high, the working efficiency can be improved, and the repeated work and the work loss can be reduced; the problem caused by the landform of a mountainous area can be solved, so that the task failure is avoided; and the problems that the efficiency of traditional three-dimensional modeling is low and real textures cannot be well reflected in are solved, and the problems that a built real-scene three-dimensional model needs to be post-processed due to insufficiently ideal fineness and textures, and the like are solved.

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...

AI Technical Summary

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.