A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic Scenes
To acquire images of dynamic scenes from multiple points of view simultaneously, the acquisition time of vision sensors should be synchronized. In this paper, an illumination-based synchronization derived from the phase-locked loop (PLL) mechanism based on the signal normalization method is proposed...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2010-09-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/10/9/8719/ |
| _version_ | 1811184764922626048 |
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| author | Koichi Hashimoto Shingo Kagami Lei Hou |
| author_facet | Koichi Hashimoto Shingo Kagami Lei Hou |
| author_sort | Koichi Hashimoto |
| collection | DOAJ |
| description | To acquire images of dynamic scenes from multiple points of view simultaneously, the acquisition time of vision sensors should be synchronized. In this paper, an illumination-based synchronization derived from the phase-locked loop (PLL) mechanism based on the signal normalization method is proposed and evaluated. To eliminate the system dependency due to the amplitude fluctuation of the reference illumination, which may be caused by the moving objects or relative positional distance change between the light source and the observed objects, the fluctuant amplitude of the reference signal is normalized framely by the estimated maximum amplitude between the reference signal and its quadrature counterpart to generate a stable synchronization in highly dynamic scenes. Both simulated results and real world experimental results demonstrated successful synchronization result that 1,000-Hz frame rate vision sensors can be successfully synchronized to a LED illumination or its reflected light with satisfactory stability and only 28-μs jitters. |
| first_indexed | 2024-04-11T13:17:58Z |
| format | Article |
| id | doaj.art-498ad52ff3aa4d429cfb113d21a3b173 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:17:58Z |
| publishDate | 2010-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-498ad52ff3aa4d429cfb113d21a3b1732022-12-22T04:22:19ZengMDPI AGSensors1424-82202010-09-011098719873910.3390/s100908719A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic ScenesKoichi HashimotoShingo KagamiLei HouTo acquire images of dynamic scenes from multiple points of view simultaneously, the acquisition time of vision sensors should be synchronized. In this paper, an illumination-based synchronization derived from the phase-locked loop (PLL) mechanism based on the signal normalization method is proposed and evaluated. To eliminate the system dependency due to the amplitude fluctuation of the reference illumination, which may be caused by the moving objects or relative positional distance change between the light source and the observed objects, the fluctuant amplitude of the reference signal is normalized framely by the estimated maximum amplitude between the reference signal and its quadrature counterpart to generate a stable synchronization in highly dynamic scenes. Both simulated results and real world experimental results demonstrated successful synchronization result that 1,000-Hz frame rate vision sensors can be successfully synchronized to a LED illumination or its reflected light with satisfactory stability and only 28-μs jitters.http://www.mdpi.com/1424-8220/10/9/8719/high-speed visionrobot visionvision chipcamera synchronization; phase-locked loopsignal processingvisible light communicationsignal normalization; quadrature detection |
| spellingShingle | Koichi Hashimoto Shingo Kagami Lei Hou A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic Scenes Sensors high-speed vision robot vision vision chip camera synchronization; phase-locked loop signal processing visible light communication signal normalization; quadrature detection |
| title | A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic Scenes |
| title_full | A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic Scenes |
| title_fullStr | A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic Scenes |
| title_full_unstemmed | A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic Scenes |
| title_short | A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic Scenes |
| title_sort | signal normalization technique for illumination based synchronization of 1 000 fps real time vision sensors in dynamic scenes |
| topic | high-speed vision robot vision vision chip camera synchronization; phase-locked loop signal processing visible light communication signal normalization; quadrature detection |
| url | http://www.mdpi.com/1424-8220/10/9/8719/ |
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