Patent · US Active

Multi-path compensation using multiple modulation frequencies in time of flight sensor

US9753128B2 · kind B2 · utility

67Cited by

6References

10Claims

0Family size

Assignee

Heptagon Micro Optics Pte. Ltd. · SG

Inventors

Matthias Schweizer · Tuttlingen, DE
Thierry Oggier · Zürich, CH
Bernhard Buettgen · Adliswil, CH

Key dates

Filing date	Jul 25, 2011
Grant date	Sep 5, 2017
Priority date	—
Expiry date	Apr 24, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04N13/207
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method to compensate for multi-path in time-of-flight (TOF) three dimensional (3D) cameras applies different modulation frequencies in order to calculate/estimate the error vector. Multi-path in 3D TOF cameras might be caused by one of the two following sources: stray light artifacts in the TOF camera systems and multiple reflections in the scene. The proposed method compensates for the errors caused by both sources by implementing multiple modulation frequencies.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.