Stereo orthophoto pair-based large-scene stereo model generating method and measuring method thereof

A technology of three-dimensional model and three-dimensional orthorectography, which is applied in photogrammetry/video metrology, measuring equipment, 3D modeling, etc., can solve the problems of cumbersome process, reduced accuracy of elevation measurement, and inability to guarantee the accuracy of plane measurement. Achieve the effect of good tolerance and fast calculation speed
CN101770656BActive Publication Date: 2011-10-05CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
Publication Date
2011-10-05

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Abstract

The invention belongs to the technical field of surveying and mapping science, relating to a stereo orthophoto pair-based large-scene stereo model generating method and a measuring method thereof. The prior model generating and measuring methods have low measurement precision, or complicated calculation and low efficiency. The method provides the stereo orthophoto pair-based large-scene stereo model generating and measuring methods, embeds and establishes a large-scene stereo model by using the stereo orthophoto pair, and can quickly and accurately calculate three-dimensional coordinates of aterrain point. When the method is used for measuring, a parallax acquisition method in accordant direction is adopted, image points corresponding to the terrain points can be found at high speed, coordinates can be directly calculated through plane displacement without reversely thrusting three dimensional coordinates of an original image to carry out forward intersection, and the calculation precision of the method is very close to the stereo measurement precision of the original image pair.
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Description

Technical field:

[0001] The invention belongs to the field of surveying and mapping science and technology, and relates to a method for generating a three-dimensional model of a large scene based on a pair of three-dimensional orthophoto images and a measurement method thereof. The unique parallax acquisition method and plane coordinate displacement calculation can quickly and accurately calculate the three-dimensional coordinates of the ground point, and realize the accurate and fast measurement of the three-dimensional model. Background technique:

[0002] A known stereoscopic orthophoto model is a model composed of orthophotos and stereo matching images (or called auxiliary stereoscopic images). The model retains a large amount of detailed surface information in aerial images, and with the help of stereoscopic display equipment, human eyes can see the real ground landscape. On the three-dimensional model, through a simple measurement method, non-professionals can easily ...

Claims

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