Three dimensional plane extraction method

Abstract

The invention provides a three dimensional plane extraction method. The input of the technical scheme is that any method is used for obtaining a three dimensional line feature set and a sparse digital elevation model data in a target scene, obtaining stereo image of a target scene from two different visual angles and obtaining all the inner parameters and the outer parameters of the stereoscopic camera as well as the line extracting result of the stereo image; the output of the technical scheme is the three dimensional plane with high positioning precision and favorable boundary integrity andaccuracy. In the treating process of the technical scheme, the positioning of the three dimensional plane and the extraction and separation of the plane zone boundary are divided into two stages which are connected for independently finishing two tasks and reducing error impact between the two tasks, which causes the results of the two stages to be respectively optimal, so that the three dimensional plane extraction is optimal.

Description

technical field [0001] The invention relates to the fields of photogrammetry, remote sensing and computer vision, in particular to a method for extracting a three-dimensional plane. Background technique [0002] The 3D reconstruction of man-made objects has a wide range of applications in the fields of urban planning, disaster monitoring, and communication facility construction. It has long been an important research topic in the fields of photogrammetry, remote sensing, and computer vision. In the target 3D reconstruction scheme of various polyhedral structures, 3D plane extraction is a key step. [0003] At present, there are mainly four methods for extracting 3D planes: the first method is to use the directly obtained dense digital elevation model (Digital Elevation Model, referred to as DEM) data to obtain a 3D plane by fitting; the second method is to obtain different lighting conditions The image of the target area below, combined with the reflection characteristic mo...

AI Technical Summary

Problems solved by technology

In comparison, the disadvantage of the first method is that as the data density of elevation points increases, the acquisition cost will increase at the same time, and for targets with complex structures, if there is no prior knowledge of the number of planes or the approximate type of target structure, the extraction All planes of the target surface are difficult

The disadvantage of the second method is that multiple lighting conditions need to be known accurately, so this method is mostly used in the surface reconstruction of small-volume targets in a simple lighting environment. Cooperation situation, this method is difficult to achieve satisfactory results

The disadvantage of the third method is that the geometry of the extractable plane is limited

In the fourth existing 3D plane extraction technology, the two kinds of information are extracted as one task at the same time, the positioning accuracy of the plane will be affected by the boundary positioning error, and the boundary positioning accuracy obtained by the intersection of the planes will be affected by the boundary positioning error of the plane. Positioning parameter error and reduce

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