Method of high-precision 3D reconstruction of existing railway track lines based on UAV multi-view images
US12347136B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2022 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Dec 6, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method of high-precision 3D reconstruction of existing railway track lines based on UAV multi-view images, including: acquiring initial data, acquiring a UAV image rail top centerline, calculating a rail top centerline based on a nonlinear least squares method, and calculating three-dimensional coordinates of the rail centerline. Based on the multi-view geometry principle in computer vision and photogrammetry, object space coordinates of the line can be directly calculated by using image information, which does not require outdoor workers to work online and can effectively improve the safety of railway operation line surveying and mapping. Therefore, this method has important engineering application value and application prospect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.