Automatic extraction of power towers from disordered laser point cloud data

Abstract

The invention discloses an automatic extraction method of a power tower in random laser point cloud data. The method includes the steps of : (1) an airborne light detection and ranging system is used to take an aerial photo of power line inspection; laser point cloud data of the power line inspection are obtained; the obtained laser point cloud data are meshed; an elevation value image of the power line inspection is generated; the power line inspection comprises inspection of a power tower, a power line and a potentially dangerous object; (2) the elevation value image is binarized; (3) the elevation value image is corroded; (4) the elevation value image is expanded; (5) the elevation value image is then scanned, and all dark spots are processed by a K-means clustering to get clustering of different ground objects, wherein the ground objects include potentially dangerous / non-dangerous ground objects, and the value of K is obtained by visual estimation of a quantity of the power tower and the ground objects and is inputted manually; and (6) the clustering result obtained in step (5) performs statistics of a quantity of image points. If the quantity of the image points is greater than a threshold value, the corresponding image is considered as the power tower; otherwise, the corresponding image is considered as the potentially dangerous object; and accordingly the automatic extraction of the power tower is realized.

Description

technical field

[0001] The invention belongs to a method for extracting power equipment in the field of power line inspection, and specifically refers to a method for automatically extracting power towers from disordered laser point cloud data. Background technique

[0002] The power tower is an important device for high-voltage power transmission and transformation. It is used to realize the large-scale and long-distance supply of power resources. It is an important basic equipment in the country's economic construction. To ensure efficient power transmission and safe energy supply, it is necessary to grasp and monitor the current status of power tower facilities in real time and accurately, and establish a complete early warning and emergency response mechanism. Therefore, the detection and modeling of power towers becomes an important guarantee to solve this problem. On this basis, carry out scene analysis around power facilities, such as: detection of other types of art...

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