Extracting Rail Track Geometry from Static Terrestrial Laser Scans for Monitoring Purposes

Extracting Windows from Terrestrial Laser Scanning

With the high density point clouds obtained with terrestrial laser scanning, detailed building facade structures, such as windows, can be recovered. There are usually only a few laser points available for windows, because window frames are small parts on walls, and window glass reflects no laser beam. Insufficient raw laser information makes it very difficult to recover reliable geometry of a w...

A novel method for locating the local terrestrial laser scans in a global aerial point cloud

In addition to the heterogeneity of aerial and terrestrial views, the small scale terrestrial point clouds are hardly comparable with large scale and overhead aerial point clouds. A hierarchical method is proposed for automatic locating of terrestrial scans in aerial point cloud. The proposed method begins with detecting the candidate positions for the deployment of the terrestrial laser scanne...

Onboard Dynamic Rail Track Safety Monitoring System

This proposal aims at solving one of the long prevailing problems in the Railways. This simple method of continuous monitoring and assessment of the condition of the rail tracks can prevent major disasters and save precious human lives. Our method is capable of alerting the train in case of any dislocations in the track or change in strength of the soil. Also it can avert the collisions of the ...

Terrestrial Laser Scanning for Deformation Monitoring

Small scale deformation monitoring using terrestrial laser scanning is gaining considerable attention mainly due to the high spatial resolution of the acquired data. The notion of this paper is to discuss the issues influencing the feasibility of laser scanning for deformation monitoring. Prior to any data collection it is critical to evaluate the scanner’s performance within a calibration sche...

Optimal Maintenance and Renewal Strategy Due to Rail Track Geometry