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Three-dimensional building model contour feature line extraction method based on oblique photogrammetry

A technology of oblique photogrammetry and three-dimensional models, which is applied in the field of feature line extraction of three-dimensional building model contours and computer-readable storage media, can solve problems such as poor effect and low efficiency of feature lines, and achieve improved extraction efficiency, improved extraction effect, Extract targeted effects

Inactive Publication Date: 2020-02-25
四川视慧智图空间信息技术有限公司
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Problems solved by technology

[0007] The object of the present invention is to provide a method, device, equipment and computer-readable storage medium for extracting feature lines of three-dimensional building model contours based on oblique photogrammetry, so as to solve the problems of low efficiency and poor effect of feature line extraction methods in the prior art

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  • Three-dimensional building model contour feature line extraction method based on oblique photogrammetry
  • Three-dimensional building model contour feature line extraction method based on oblique photogrammetry
  • Three-dimensional building model contour feature line extraction method based on oblique photogrammetry

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[0056] The core of the present invention is to provide a method, device, equipment, and computer-readable storage medium for extracting contour feature lines of three-dimensional building models based on oblique photogrammetry, which improves the extraction efficiency of contour feature lines of three-dimensional building models, and the target extraction is accurate .

[0057] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] Please refer to figure 1 , fi...

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Abstract

The invention discloses a three-dimensional building model contour feature line extraction method, device and equipment based on oblique photogrammetry and a computer readable storage medium. The method comprises the steps that after an original model of a three-dimensional building is preprocessed to reconstruct topology, two feature points are selected as starting and ending points of a target feature line, a bounding box is generated, an out-of-box irrelevant model is ignored, and directed graph structures are used for organizing model data; weighting the directed graph edges based on the distance, the direction and the change trend; a Dijkstra algorithm is utilized to obtain a weighted shortest path between a starting point and an ending point, and a target feature line is extracted; according to the method, the device, the equipment and the computer readable storage medium provided by the invention, the extraction efficiency of the contour feature line of the three-dimensional building model is improved, and the target extraction is accurate.

Description

technical field [0001] The present invention relates to the technical fields of oblique photogrammetry and geographic information systems, in particular to a method, device, equipment and computer-readable storage medium for extracting feature lines of three-dimensional building model contours based on oblique photogrammetry. Background technique [0002] In recent years, the demand for smart city construction has been increasing day by day. Urban modeling is the foundation of smart cities. Oblique photogrammetry 3D reconstruction with wide range, high efficiency and low cost has become the main means of urban modeling. However, most oblique photogrammetry 3D models stay at the browsing and viewing level, and it is difficult to support in-depth application requirements such as realistic display or spatial analysis. It is urgent to cooperate with other means to improve the visualization effect of the 3D model. [0003] During the research process, it was found that by carryin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/13G06T17/20
CPCG06T7/13G06T17/20G06T2210/12G06T5/77
Inventor 胡翰尚琪森朱庆
Owner 四川视慧智图空间信息技术有限公司
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