Method for measuring a distance separating a camera from a reference object
US12406383B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 2022 |
| Grant date | Sep 2, 2025 |
| Priority date | — |
| Expiry date | Sep 21, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20164
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for measuring a distance separating a camera from a reference object including a predetermined number of corners arranged in a pattern and at least two reference points separated by a reference length. The method includes acquiring an image including the reference object with the camera, detecting corners in the image, attributing a class to each corner, based on an orientation of the corner, detecting the reference object in the image based on the corners and attributed classes, placing the reference points in the image based on the corners of the reference object and measuring an imaged length separating the reference points, and comparing the reference length to the imaged length and obtaining the distance separating the camera from the reference object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.