{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T14:22:32Z","timestamp":1761488552681,"version":"build-2065373602"},"reference-count":21,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2010,9,20]],"date-time":"2010-09-20T00:00:00Z","timestamp":1284940800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>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-\u03bcs jitters.<\/jats:p>","DOI":"10.3390\/s100908719","type":"journal-article","created":{"date-parts":[[2010,9,27]],"date-time":"2010-09-27T11:23:33Z","timestamp":1285586613000},"page":"8719-8739","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["A Signal Normalization Technique for Illumination-Based Synchronization of 1,000-fps Real-Time Vision Sensors in Dynamic Scenes"],"prefix":"10.3390","volume":"10","author":[{"given":"Lei","family":"Hou","sequence":"first","affiliation":[{"name":"Department of System Information Sciences, Graduate School of Information Sciences, Tohoku University, 6-6-01 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan"}]},{"given":"Shingo","family":"Kagami","sequence":"additional","affiliation":[{"name":"Department of System Information Sciences, Graduate School of Information Sciences, Tohoku University, 6-6-01 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan"}]},{"given":"Koichi","family":"Hashimoto","sequence":"additional","affiliation":[{"name":"Department of System Information Sciences, Graduate School of Information Sciences, Tohoku University, 6-6-01 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan"}]}],"member":"1968","published-online":{"date-parts":[[2010,9,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Fujiyoshi, H, Shimizu, S, and Nishi, T (2003, January 16\u201320). Fast 3D Position Measurement with Two Unsynchronized Cameras. Kobe, Japan.","DOI":"10.1109\/CIRA.2003.1222174"},{"key":"ref_2","unstructured":"Available online: http:\/\/www.ptgrey.com\/products\/multisync\/index.asp (accessed on 16 February 2009)."},{"key":"ref_3","unstructured":"Rai, PK, Tiwari, K, Guha, P, and Mukerjee, A (2003, January 17\u201320). A Cost-effective Multiple Camera Vision System using FireWire Cameras and Software Synchronization. Hyderabad, India."},{"key":"ref_4","unstructured":"Litos, G, Zabulis, X, and Triantafyllidis, G (2006). CVPRW \u201906: Proceedings of the 2006 Conference on Computer Vision and Pattern Recognition Workshop, IEEE Computer Society."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"45","DOI":"10.1109\/MNET.2004.1316761","article-title":"Time Synchronization in Sensor Networks: A Survey","volume":"18","author":"Sivrikaya","year":"2004","journal-title":"IEEE Netw"},{"key":"ref_6","unstructured":"Elson, J, Girod, L, and Estrin, D (2002). Proceedings of the 5th Symposium on Operating Systems Design and Implementation, ACM."},{"key":"ref_7","unstructured":"Ganeriwal, S, Kumar, R, and Srivastava, MB (2003). SenSys \u201903: Proceedings of the 1st International Conference on Embedded Networked Sensor Systems, ACM."},{"key":"ref_8","unstructured":"Mar\u00f3ti, M, Kusy, B, Simon, G, and L\u00e9deczi, A (2004). SenSys \u201904: Proceedings of the 2nd International Conference on Embedded Networked Sensor Systems, ACM."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"5530","DOI":"10.3390\/s100605530","article-title":"Illumination-based Synchronization of High-Speed Vision Sensors","volume":"10","author":"Hou","year":"2010","journal-title":"Sensors"},{"key":"ref_10","unstructured":"Best, RE (2007). Phase-Locked Loops: Design, Simulation, and Applications, McGraw-Hill Professional."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Gardner, FM (2005). Phaselock Techniques, Wiley-Interscience. [3rd ed].","DOI":"10.1002\/0471732699"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1088\/0022-3735\/15\/4\/001","article-title":"Advances in Lock-in Amplifiers","volume":"15","author":"Meade","year":"1982","journal-title":"J. Phys.-E-Sci. Instrum"},{"key":"ref_13","unstructured":"Hou, L, Kagami, S, and Hashimoto, K (2010). International Conference on Advanced Mechatronics 2010, IEEE Computer Society."},{"key":"ref_14","first-page":"378","article-title":"An Advanced Algorithm for Illumination-Based Synchronization of High-Speed Vision Sensors in Dynamic Scenes","volume":"6425","author":"Hou","year":"2010","journal-title":"Lect. Note. Artif. Intell"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2059","DOI":"10.1109\/TED.2003.816907","article-title":"Correlation Image Sensor: Two-Dimensional Matched Detection of Amplitude-Modulated Light","volume":"50","author":"Ando","year":"2003","journal-title":"IEEE Trans. Electron. Devices"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"166","DOI":"10.1109\/TED.2002.806479","article-title":"An Image Sensor With an In-Pixel Demodulation Function for Detecting the Intensity of a Modulated Light Signal","volume":"50","author":"Ohta","year":"2003","journal-title":"IEEE Trans. Electron. Devices"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1876","DOI":"10.1093\/ietele\/e90-c.10.1876","article-title":"An Image-Moment Sensor with Variable-Length Pipeline Structure","volume":"90","author":"Iwashita","year":"2007","journal-title":"IEICE Trans. Electron"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1109\/MM.2009.89","article-title":"A QVGA-size Pixel-parallel Image Processor for 1,000-fps Vision","volume":"29","author":"Komuro","year":"2009","journal-title":"IEEE Micro"},{"key":"ref_19","unstructured":"Kagami, S, Komuro, T, and Ishikawa, M (2004, January 25\u201328). A High-Speed Vision System with In-Pixel Programmable ADCs and PEs for Real-Time Visual Sensing. Kawasaki, Japan."},{"key":"ref_20","first-page":"258","article-title":"Performance Evaluation of visible-Light Wireless Communication System Using White LED Lightings","volume":"1","author":"Komine","year":"2004","journal-title":"Comput. Commun., IEEE Symp"},{"key":"ref_21","first-page":"2440","article-title":"Indoor Visible Light Data Transmission System Utilizing White LED Lights","volume":"86","author":"Tanaka","year":"2003","journal-title":"IEICE Trans. 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