Seamless stereomodel high-precision measuring method based on digital normal incidence image and stereo auxiliary image

Abstract

The invention discloses a high precise stereo measuring method for seamless stereo mould based on the digital orthogonal image and stereo assistant image. The method calculates inversely the measured isonym image point on the seamless stereo mould into the original stereo image pair of the image point. Then, it calculates the three-dimension coordinate precisely through spatial front crossing; the accuracy doesn't be affected by digital ground mould difference in the producing process of the stereo mould, in condition of that the resolution of the seamless stereo mould digital orthogonal image and the stereo assistant image and the aviation photo's resolution is consistent, the accuracy can reach the one with original stereo image measuring.

Description

technical field [0001] The invention belongs to the field of surveying and mapping science and technology, and relates to a high-precision measurement method of a seamless three-dimensional model based on digital orthophoto images and stereo auxiliary images. If the resolution of the digital orthophoto is consistent with that of the original aerial photo, its measurement accuracy can reach the stereo measurement accuracy of the original stereo pair model. Background technique [0002] The measurable seamless stereo model is a new form of spatial stereo model in the field of photogrammetry. It is constructed based on digital orthophotos and stereoscopic auxiliary images that introduce parallax. It seamlessly stitches multiple stereo models of image pairs within a continuous shooting area into a continuous and seamless measurable seamless stereo model. The three-dimensional model is easy to construct and use, it can reproduce all the terrain and ground object details of the ...

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Problems solved by technology

[0003] In the published invention patent, the method for generating a measurable seamless space stereo model (patent application number: 02147752.3), a stereo measurement method is introduced, which uses the ground coordinates of the image point with the same name on the orthophoto image as the Its plane coordinates, and then through the introduced parallax function, the measured parallax of the same name point is reversely calculated to obtain the height of the same name image point for stereo measurement. Although this method has a certain ability to resist the gross error interference of the digital ground model, its calculation process Not rigorous enough, the accuracy of its measurement is not as accurate as that measured on the original stereo pair

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