Built-in calibration of time-of-flight depth imaging systems
US11961257B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2022 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Aug 22, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An image processing system having on-the-fly calibration uses the placement of the imaging sensor and the light source for calibration. The placement of the imaging sensor and light source with respect to each other affect the amount of signal received by a pixel as a function of distance to a selected object. For example, an obstruction can block the light emitter, and as the obstruction is positioned an increasing distance away from the light emitter, the signal level increases as light rays leave the light emitters, bounce off the obstruction and are received by the imaging sensor. The system includes a light source configured to emit light, and an image sensor to collect incoming signals including reflected light, and a processor to determine a distance measurement at each of the pixels and calibrate the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.