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题名: Sound recovery via intensity variations of speckle pattern pixels selected with variance-based method
作者: Zhu, Ge; Yao, Xu-Ri; Qiu, Peng; Mahmood, Waqas; Yu, Wen-Kai; Sun, Zhi-Bin; Zhai, Guang-Jie; Zhao, Qing
作者部门: 空间技术部
通讯作者: Zhao, Q (reprint author), Beijing Inst Technol, Ctr Quantum Technol Res, Sch Phys, Beijing, Peoples R China. ; Yao, XR (reprint author), Chinese Acad Sci, Key Lab Elect & Informat Technol Space Syst, Natl Space Sci Ctr, Beijing, Peoples R China.
关键词: sound recovery ; laser speckle patterns ; intensity variation ; high-speed camera
刊名: OPTICAL ENGINEERING
ISSN号: 0091-3286
出版日期: 2018
卷号: 57, 期号:2, 页码:26117
收录类别: SCI ; EI
项目资助者: National Science Foundation of China [11675014] ; Ministry of Science and Technology of China [2013YQ030595-3] ; National Natural Science Foundation of China [61274024, 61474123] ; National Key Research and Development Plan [2016YFE0131500]
英文摘要: In general, the sound waves can cause the vibration of the objects that are encountered in the traveling path. If we make a laser beam illuminate the rough surface of an object, it will be scattered into a speckle pattern that vibrates with these sound waves. Here, an efficient variance-based method is proposed to recover the sound information from speckle patterns captured by a high-speed camera. This method allows us to select the proper pixels that have large variances of the gray-value variations over time, from a small region of the speckle patterns. The gray-value variations of these pixels are summed together according to a simple model to recover the sound with a high signal-to-noise ratio. Meanwhile, our method will significantly simplify the computation compared with the traditional digital-image-correlation technique. The effectiveness of the proposed method has been verified by applying a variety of objects. The experimental results illustrate that the proposed method is robust to the quality of the speckle patterns and costs more than one-order less time to perform the same number of the speckle patterns. In our experiment, a sound signal of time duration 1.876 s is recovered from various objects with time consumption of 5.38 s only. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6206
Appears in Collections:空间技术部_期刊论文

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