Camera Pose Trace Based on Motion Sensor in Mobile Devices

2017 ◽  
Author(s):  
Chung-Hua Chu ◽  
Chih-Hua Tai
Keyword(s):  
Mobile Devices ◽  
Motion Sensor ◽  
Camera Pose

Audio Keyword Reconstruction from On-Device Motion Sensor Signals via Neural Frequency Unfolding

2021 ◽  
Vol 5 (3) ◽  
pp. 1-29
Author(s):  
Tianshi Wang ◽  
Shuochao Yao ◽  
Shengzhong Liu ◽  
Jinyang Li ◽  
Dongxin Liu ◽  
...  
Keyword(s):  
Neural Network ◽  
Mobile Devices ◽  
High Frequency ◽  
Sampling Rate ◽  
Audio Signal ◽  
Sensor Data ◽  
Motion Sensor ◽  
Motion Sensors ◽  
Time Frequency ◽  
Sensor Signals

In this paper, we present a novel deep neural network architecture that reconstructs the high-frequency audio of selected spoken human words from low-sampling-rate signals of (ego-)motion sensors, such as accelerometer and gyroscope data, recorded on everyday mobile devices. As the sampling rate of such motion sensors is much lower than the Nyquist rate of ordinary human voice (around 6kHz+), these motion sensor recordings suffer from a significant frequency aliasing effect. In order to recover the original high-frequency audio signal, our neural network introduces a novel layer, called the alias unfolding layer, specialized in expanding the bandwidth of an aliased signal by reversing the frequency folding process in the time-frequency domain. While perfect unfolding is known to be unrealizable, we leverage the sparsity of the original signal to arrive at a sufficiently accurate statistical approximation. Comprehensive experiments show that our neural network significantly outperforms the state of the art in audio reconstruction from motion sensor data, effectively reconstructing a pre-trained set of spoken keywords from low-frequency motion sensor signals (with a sampling rate of 100-400 Hz). The approach demonstrates the potential risk of information leakage from motion sensors in smart mobile devices.

Motion-sensor fusion-based gesture recognition and its VLSI architecture design for mobile devices

2013 ◽  
Vol 101 (5) ◽  
pp. 621-635 ◽  
Author(s):  
Wenping Zhu ◽  
Leibo Liu ◽  
Shouyi Yin ◽  
Siqi Hu ◽  
Eugene Y. Tang ◽  
...  
Keyword(s):  
Mobile Devices ◽  
Sensor Fusion ◽  
Gesture Recognition ◽  
Vlsi Architecture ◽  
Motion Sensor ◽  
Architecture Design

Phishing in Mobile Devices: Survey and Prevention Mechanism

2012 ◽  
Vol 2 (3) ◽  
pp. 86-88
Author(s):  
Dr. Kuntal Patel ◽  
◽  
Prof. Parimal Patel
Keyword(s):  
Mobile Devices

Evaluation for Effectiveness of Individual Lighting Control using Image-based Motion Sensor

2018 ◽  
Vol 138 (11) ◽  
pp. 1362-1374 ◽  
Author(s):  
Takuya Futagami ◽  
Toru Yano ◽  
Chingchun Huang ◽  
Takaaki Enohara
Keyword(s):  
Motion Sensor ◽  
Lighting Control
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