scholarly journals Real-time audio detection and regeneration of moving sound source based on optical flow algorithm of laser speckle images

2020 ◽  
Vol 28 (4) ◽  
pp. 4475 ◽  
Author(s):  
Nan Wu ◽  
S. Haruyama
Keyword(s):  
Optical Flow ◽  
Real Time ◽  
Sound Source ◽  
Laser Speckle ◽  
Flow Algorithm ◽  
Moving Sound Source

scholarly journals Viaxl: A Solution of a Low-Cost Real-Time Visual Accelerometer Based on Laser Speckle Optical Flow Detection

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7033
Author(s):  
Zhitian Li ◽  
Wuhao Yang ◽  
Xingyin Xiong ◽  
Zheng Wang ◽  
Xudong Zou
Keyword(s):  
Optical Flow ◽  
Real Time ◽  
Signal To Noise Ratio ◽  
Low Cost ◽  
Laser System ◽  
Laser Speckle ◽  
Vibration Monitoring ◽  
Acceleration Measurement ◽  
Wide Range ◽  
Flow Detection

Non-contact and non-destructive acceleration measurement is receiving considerable attention due to their low cost, flexibility, and simplicity of implementation, as well as their excellent performance in some emerging applications such as medical electronics applications, vibration monitoring, and some other special scenarios. In this paper, a visual accelerometer system based on laser speckle optical flow detection named Viaxl is proposed. Compared with the conventional non-contact acceleration measurement method based on a laser system, Viaxl has moderate and stable performance with the advantages of low cost and simplicity of implementation. Experiment results demonstrate that Viaxl, which consists of a commercial camera and a low-cost laser pointer, can achieve real-time, non-contact acceleration measurement, and confirm the basic system performance of Viaxl: a measurement nonlinearity better than 1.3%, up to 31 dB signal-to-noise ratio, and 1150 Hz theoretic bandwidth; this demonstrates the huge potential of Viaxl in a wide range of applications, and provides a new possible technical method for non-contact acceleration detection.

scholarly journals Real-time Target Human Tracking using Camshift and LucasKanade Optical Flow Algorithm

2021 ◽  
Vol 6 (2) ◽  
pp. 907-914
Author(s):  
Van-Truong Nguyen ◽  
Anh-Tu Nguyen ◽  
Viet-Thang Nguyen ◽  
Huy-Anh Bui ◽  
Xuan-Thuan Nguyen
Keyword(s):  
Optical Flow ◽  
Real Time ◽  
Human Tracking ◽  
Flow Algorithm
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