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Gridding-based point cloud data retrieval method

A point cloud data and grid technology, applied in other database retrieval, other database query, special data processing applications, etc., can solve the problem of low retrieval efficiency

Pending Publication Date: 2021-07-30
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] This application provides a grid-based point cloud data retrieval method to solve the problem of low retrieval efficiency in traditional point cloud data retrieval methods

Method used

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  • Gridding-based point cloud data retrieval method

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Embodiment Construction

[0031] In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application; obviously, the described implementation Examples are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0032] Point cloud data refers to a set of vectors in a three-dimensional coordinate system. The scanned data is recorded in the form of points. Each point contains three-dimensional coordinates, and some may contain information such as color and reflection intensity.

[0033] The point cloud data retrieval method based on gridding in the embodiment of t...

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Abstract

The invention relates to a gridding-based point cloud data retrieval method. The method comprises the following steps: determining a boundary value of point cloud data; determining a boundary range and a reference point of the point cloud data according to the boundary value; dividing the point cloud data into point cloud grids according to the boundary range and a preset grid side length, and determining the number of the point cloud grids; determining index numbers of discrete points in the point cloud grids according to the reference points and the number of the point cloud grids; and retrieving the point cloud data according to a preset retrieval method and the index number. Through the steps, the point cloud data formed by a large number of discrete points are gridded, and retrieval is performed according to the adjacent clustering algorithm by taking the gridded point cloud grid as a unit in the point cloud data retrieval process, so that the problem of low efficiency caused by traversing the point cloud data in an existing mode is avoided, the data retrieval efficiency is improved, and the requirement on rapid analysis of the point cloud data is met.

Description

technical field [0001] The present application relates to the technical field of point cloud data retrieval, and in particular to a grid-based point cloud data retrieval method. Background technique [0002] In the inspection of overhead transmission lines, airborne lidar equipment is generally used to collect laser point cloud data for line channels. By analyzing the laser point cloud data of the overhead transmission line channel, it can be found whether the distance between the vegetation, buildings, etc. In this way, it provides technical support for business scenarios such as the elimination of hidden dangers in the channel environment of overhead transmission lines, and the verification of equipment ledgers, so as to ensure the safe operation of overhead transmission lines. [0003] At present, the analysis of laser point cloud data needs to collect and classify the discrete points in the data. To realize the ledger verification of transmission towers and the analysis...

Claims

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Application Information

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IPC IPC(8): G06F16/903G06F16/906
CPCG06F16/903G06F16/906
Inventor 黄绪勇
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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