Time-of-flight phase-offset calibration
US9681123B2 · kind B2 · utility
9Cited by
3References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 4, 2014 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Aug 14, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/254
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method to calibrate an imaging array of a time-of-flight depth camera includes the act of modulating emission from a light source of the camera while synchronously biasing the imaging array. In this method, the modulated emission reflects from a compact reflector positioned a known distance from the camera and passes through an optical diffuser en route to the imaging array. For each pixel of the imaging array, a correction term is stored, which brings the output from that pixel into agreement with the actual distance between the camera and the compact reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.