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Point cloud facade extraction method and apparatus

An extraction method and extraction device technology, which are applied in the field of surveying and mapping information, can solve problems such as threshold interference, and achieve the effect of a simple and effective screening method

Active Publication Date: 2017-01-11
SHENZHEN TENCENT COMP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Affected by factors such as occlusion, the grid characteristics of the facade point cloud projection are different from the typical facade grid characteristics, which will interfere with the selection of the threshold

Method used

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  • Point cloud facade extraction method and apparatus
  • Point cloud facade extraction method and apparatus

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Embodiment Construction

[0050] Embodiments of the present invention provide a point cloud facade extraction method and device, which are used to quickly and effectively determine points on the facade of a target building and extract the facade.

[0051] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0052] The terms "comprising" and "having" and any variations thereof in the description and claims of the pres...

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Abstract

Embodiments of the invention disclose a point cloud facade extraction method and apparatus. The method provided by the embodiment of the invention comprises the steps of obtaining a direction of a normal vector of each point in point cloud; obtaining a facade candidate point set, wherein candidate points in the facade candidate point set are points in the point cloud, and the included angles between the directions of the normal vectors of the points and a horizontal plane are smaller than a preset angle; establishing a plurality of seed facades according to the facade candidate point set; and combining the seed facades into a target building facade. According to the method and the apparatus provided by the embodiments of the invention, the points on the target building facade can be quickly and effectively determined and the facade is extracted.

Description

technical field [0001] The invention relates to the field of surveying and mapping information, in particular to a point cloud facade extraction method and device. Background technique [0002] The mobile measurement system is a fast photogrammetry system based on mobile carriers such as airplanes, airships, trains and automobiles. The vehicle-mounted mobile measurement system uses the car as the carrier platform, and its core components generally include: laser scanning system, image imaging system and integrated navigation system. The vehicle-mounted laser point cloud refers to the collection of surface points along the road and the buildings on both sides of the road scanned by the vehicle-mounted mobile measurement system. Due to the acquisition method of the on-board laser scanning system scanning along the road, the fine building point cloud information on both sides of the road along the entire city can be quickly obtained, which in turn provides the basis for subseq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/00
Inventor 曾超马腾
Owner SHENZHEN TENCENT COMP SYST CO LTD
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