Electro-hydraulic varifocal lens-based method for tracking three-dimensional trajectory of moving object
US12136239B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2022 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Mar 10, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30241
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure discloses an electro-hydraulic varifocal lens-based method for tracking a 3D trajectory of a moving object. The method includes the following steps of: (1) obtaining a functional relation between a focusing control current and camera's intrinsic parameters; (2) obtaining a functional relation between focusing control currents of the electro-hydraulic varifocal lens and an optimal object distance; (3) initializing an object tracking algorithm, and taking an object tracking box as a subsequent focusing window; (4) carrying out first autofocusing, recording a focusing control current value after the autofocusing is completed, as well as a size and center point coordinates of the object tracking box; (5) calculating and recording coordinates of the object in 3D space; and (6) repeating steps (4) and (5) for the same object, and sequentially connecting the recorded coordinates of the object in 3D space into a trajectory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.