Railway business line three-dimensional center line manufacturing method based on point cloud and image fusion technology

Abstract

The invention relates to a railway business line three-dimensional center line manufacturing method based on a point cloud and image fusion technology, and the method comprises the following steps: S1, field control measurement; S2, acquiring aerial photography data; S3, data preprocessing; S4, registering and fusing the laser point cloud and the image dense point cloud; S5, point cloud cutting; s6, performing real-scene three-dimensional reconstruction on the railway business line; s7, extracting track center feature points; s8, railway line center point feature extraction; and S9, manufacturing a railway three-dimensional center line. According to the method, the laser point cloud and the image dense point cloud are registered and fused, so that the density, integrity and smoothness of the laser radar point cloud are effectively improved; railway business line live-action three-dimensional reconstruction is carried out, and a live-action three-dimensional scene not only contains high-precision geometrical characteristics, but also contains rich texture attributes, so that measurement and discrimination are facilitated. According to the method, the workload of traditional railwaybusiness line surveying and mapping is effectively reduced, the field operation safety is greatly improved, and the method has great practical application value.

Description

technical field [0001] The invention belongs to the technical field of railway engineering survey and operation maintenance, and in particular relates to a method for making a three-dimensional centerline of a railway business line based on point cloud and image fusion technology. Background technique [0002] With the development of science and technology, China's railway construction is changing with each passing day, and the railway mileage and coverage continue to increase. By the end of 2019, my country's railway operating mileage exceeded 130,000 kilometers, including 35,000 kilometers of high-speed railways. Among the operating railways, the double-tracking rate and electrification rate reached 50%. above. In order to improve the railway traffic volume and ensure the safety of railway operations, the railway department needs to carry out retesting of existing lines, electrification transformation and expansion of second lines on some railways every year. These projects...

AI Technical Summary

Problems solved by technology

Traditional business line measurement uses pure manual methods such as steel rulers and zippers, which are extremely inefficient and have poor accuracy; with the advancement of surveying and mapping technology, GPS-RTK methods have gradually been applied, although the pure operating efficiency has greatly improved. However, the skylight time of the business line is limited, and there are still problems of poor security and difficulty in going online

In recent years, with the rapid development of UAV technology, the application advantages of UAV aerial photography system in the surveying and mapping industry and the railway industry have become increasingly prominent due to its simple control, flexible use, and high cost performance, and the scope of application is also expanding. , making it possible to measure the three-dimensional centerline of the railway business line based on the UAV aerial photography system, but there is still no forming technology and method

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