Power transmission line three-dimensional modeling method and system based on oblique image

A technology of oblique images and transmission lines, applied in the field of 3D modeling, can solve the problems of large deformation, variable flight height, and large modeling workload, so as to reduce the flight complexity, improve the matching quality, and solve the effect of large deformation.

Pending Publication Date: 2019-07-05
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology

[0003] Among them, the three-dimensional modeling of the transmission line includes the terrain modeling of the line channel and the modeling of the transmission tower. In the prior art, the surveying and mapping of the line channel adopts the oblique image technology to model the terrain and the tower, and the flight height is variable and the modeling workload is large. , the same tower specification model cannot be reused, etc.; in addition, multi-view image oblique images also have problems of large deformation, shadows and occlusion, and the quality of dense matching in non-significant areas is not high

Method used

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  • Power transmission line three-dimensional modeling method and system based on oblique image
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  • Power transmission line three-dimensional modeling method and system based on oblique image

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Embodiment 1

[0042] See attached figure 1 , Is a schematic flow chart of a method for three-dimensional modeling of transmission lines based on oblique images provided by the first embodiment of the present invention. The method is suitable for scenes of three-dimensional modeling of transmission lines. To execute, the device can be implemented by software and / or hardware. The method specifically includes the following steps:

[0043] S101. Obtain the tilt image and POS information of the drone during the surveying, mapping and scanning process.

[0044] S102. Construct a three-dimensional map model according to the oblique image.

[0045] Specifically, the image point extraction and matching of the same name uses the scale-invariant feature transform (SIFT) to first generate the SIFT feature vector, then match the SIFT feature vector, and match the image according to the object space least square method.

[0046] The front view, rear view, left view, right view, and down view image data have mut...

Embodiment 2

[0063] Such as figure 2 As shown, the second embodiment of the present invention provides a three-dimensional modeling system for transmission lines based on oblique images, including:

[0064] The data acquisition module 21 is used to acquire the tilt image and POS information of the drone during the surveying, mapping and scanning process;

[0065] The first model construction module 22 is configured to construct a three-dimensional map model according to the oblique image;

[0066] The model matching module 23 is used to detect and identify the poles and towers in the inclined image, and match the identified poles and towers with the pole and tower models in the pole and tower ledger system according to the POS information;

[0067] The model synthesis module 24 is used for implanting the matched and returned tower models into corresponding positions in the three-dimensional map model to generate a three-dimensional model of the transmission line.

[0068] Preferably, the first mod...

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Abstract

The invention discloses a power transmission line three-dimensional modeling method and system based on an oblique image. The method comprises the steps of obtaining the oblique image and the POS information of an unmanned aerial vehicle during a surveying and mapping scanning process; constructing a three-dimensional map model according to the oblique image; detecting and identifying a tower in the oblique image, and matching the identified tower with a tower model in a tower standing book system according to the POS information; and implanting the matched and returned tower model into a corresponding position in the three-dimensional map model to generate a three-dimensional model of a power transmission line. According to the power transmission line three-dimensional modeling method andsystem based on the oblique image provided by the invention, the establishment of the power transmission line three-dimensional model is realized through a terrain model and a tower model classification processing and synthesis method, the reuse rate of the tower model is improved, and the flight complexity and the surveying and mapping and modeling workload are reduced; and meanwhile, the problems of large deformation, shadow and shielding of the multi-view image inclined image are solved, and the matching quality is improved.

Description

Technical field [0001] The embodiments of the present invention relate to the technical field of three-dimensional modeling, and in particular to a method and system for three-dimensional modeling of power transmission lines based on oblique images. Background technique [0002] At present, UAVs have been widely used in line channel modeling and power line inspection. Route channel modeling mainly uses oblique photography technology to collect images from different angles such as front view, rear view, left view, right view, down view, etc., to provide oblique image data and POS data for the establishment of various 3D models; power line inspection is mainly used Image processing technology realizes target detection, fault identification, fault location, etc., and improves the intelligent level of transmission line inspection. [0003] Among them, the three-dimensional modeling of the transmission line includes the terrain modeling of the line channel and the modeling of the trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 彭炽刚翟瑞聪李雄刚张峰柳亦钢郭锦超
Owner GUANGDONG POWER GRID CO LTD
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