Large-plotting-scale tilt image measuring method based on depth image

Abstract

The invention discloses a large-plotting-scale tilt image measuring method based on a depth image; the depth image acquired by dense matching of the tilt images is used as a data source, an image point position of a to-be-measured target is measured on single image, a three-dimensional coordinate of the to-be-measured target is calculated through a geometry relationship between the single image and the depth image, multi-view information of the to-be-measured target is searched through an optimal baseline principle and a least square method, and thus the reliability and stability of the finally obtained measurement three-dimensional coordinate are improved. While the large-plotting-scale image measurement precision can be met, the measurement work efficiency of large-plotting-scale field work measurement is improved, and a large amount of field work measurement workload is saved.

Description

technical field [0001] The invention belongs to the technical field of aerial photogrammetry, and in particular relates to a method for measuring three-dimensional point coordinates based on a single image in an oblique image obtained by using the oblique photogrammetry technology to achieve large-scale mapping of the oblique image. Background technique [0002] The traditional aerial photography technology generally obtains the information measured on the top of the terrain and features, but the information such as the side texture and 3D geometric structure of the terrain and features with obvious fluctuations has been limited, which makes the application of photogrammetry technology in image mapping. In recent years, oblique photogrammetry technology has become a new technology that has developed very rapidly in the world, overcoming the limitation of traditional aerial photogrammetry technology that can only be shot from a vertical angle. By integrating POS, DSM and vecto...

AI Technical Summary

Problems solved by technology

[0006] In Document 5, Wang Qing summarized several oblique image measurement methods that are common at home and abroad. One of the oblique image measurement methods is to use a single oblique image combined with DEM for measurement. This method uses a single image and DEM to perform three-dimensional Coordinate measurement, but because DEM has no non-ground point information, it cannot measure side information such as buildings; and the measurement method based on building characteristics mentioned in the article does not clarify detailed technical ideas

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