Optical Synchronization of Multiple Time-of-Flight Cameras Implementing TDMA
| Autor: | Beate Meffert, Felix Wermke, Thorben Wubbenhorst |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
multi-camera interference
Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Time division multiple access Synchronizing 02 engineering and technology computer.software_genre optical synchronization Synchronization Software Interference (communication) 0202 electrical engineering electronic engineering information engineering multi-device interference business.industry Firmware Process (computing) 020207 software engineering multiple camera system 004 Informatik Upgrade time-of-flight cameras 020201 artificial intelligence & image processing ddc:004 business computer Computer hardware |
| Zdroj: | 2020 IEEE SENSORS. |
| DOI: | 10.1109/sensors47125.2020.9278667 |
| Popis: | Time-of-Flight (ToF) cameras are a promising alternative to current 3-D imaging systems. A setup of multiple ToF cameras is used to overcome their comparatively lower resolution, increase the field of view, and to reduce occlusion. However, the simultaneous operation introduces the possibility of interference resulting in erroneous depth measurements. One option to mitigate interference is the consecutive arrangement of multiple cameras in time slots, such that each camera illuminates the scene exclusively, a procedure known as time division multiple access (TDMA). Instead of requiring a master synchronizing device, an approach is presented requiring no additional hardware or infrastructure to utilize TDMA by adding a synchronization software procedure to the camera's firmware. It effectively enables a camera to sense the acquisition process of other cameras and rapidly synchronize its acquisition times to operate without interference. During the experimental verification with three ToF cameras no interference occurred. The cameras each acquired 29 depth images per second while synchronizing themselves every 10 s. The proposed synchronization procedure implements an interference-free TDMA operation and overcomes traditional hard-wired synchronization setups, offering an easy setup and a methodology to upgrade existing systems without hardware modifications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|