Lateral multi-plane segmentation-based oblique photography monomer object extraction method

A technology of oblique photography and object extraction, which is applied in 3D image processing, image analysis, image enhancement, etc., can solve the problems of border jaggedness, LOD destruction, and management of oblique photography models, and achieve the effect of meeting the accuracy requirements of surveying and mapping

Active Publication Date: 2018-06-22
WUHAN UNIV OF TECH
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Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, the present invention improves the previous method of cutting and singling, and solves the problem of being unable to manage individual ground objects in the oblique photographic model, as well as the boundary jaggedness and LOD being destroyed in the cutting and singling The problem

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  • Lateral multi-plane segmentation-based oblique photography monomer object extraction method

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] refer to figure 1 As shown, in this example, the oblique photography single object extraction method based on the lateral multi-plane set includes the following steps:

[0030] (1) Start the process and load the data of the whole oblique photographic automatic modeling model into the scene.

[0031] (2) According to the extraction range selected by the user, it is used to select the tile set to which the feature object belongs;

[0032] Load the result data of the entire oblique photographic automatic modeling model into the scene. At this time, the most original data is loaded, and then the extraction range is selected, and then the tile set to which the ground object belongs is selected from the original data, which is equivalent to zooming out This process can reduce the amount of data and improve efficiency.

[0...

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Abstract

The invention discloses a lateral multi-plane segmentation-based oblique photography monomer object extraction method. The method comprises the following steps of: selecting a subordinate tile set ofa terrain object according to a user selection / extraction range, and loading the tile set in a scene; constructing a multi-plane set: generating a lateral plane according to terrain boundaries sketched by a user under different human eye optimum view angles, under each view angle, drawing sets of boundary lines of the terrain object to form a segment set, and constructing planes according to triangles so as to obtain the multi-plane set; dividing data layers according to LOD, under each data layer, cutting a TIN surface of an original photography product obtained via oblique photography through the multi-plane set, and carrying out separation and reconstruction to generate independent TIN surfaces of a monomer object; under each data layer, respectively reconstructing terrain objects and adding textures according to the independent TIN surfaces of the monomer object; and storing a newly generated monomer object as standard oblique photography. According to the method, the problem of object edge aliasing in oblique photography monomerization is solved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional geographical space model object operation, in particular to a method for extracting single object of oblique photography based on lateral multi-plane. Background technique [0002] In recent years, oblique photography technology has become an important and rapidly growing technology in the 3D geospatial modeling of today's digital cities. Compared with the previous aerial photogrammetry technology, it can not only obtain the geographical features of the top layer of the ground object, but also obtain the side surface of the ground object. The detailed outline and texture information of the map can more truly reflect the basic characteristics of geographic entities. [0003] However, in the process of 3D reconstruction based on oblique images, if there is no manual intervention, the model generated by its automatic modeling is just a continuous irregular triangulation network TIN plus t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/12G06T15/04
CPCG06T7/12G06T15/04G06T2207/30181
Inventor 张晓盼叶开时磊马晓燕刘耀午
Owner WUHAN UNIV OF TECH
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