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- Title
UltraDigit: An ultrasound signal‐based in‐air digit input system via transfer learning.
- Authors
Yang, Mengxue; Zhang, Junbao; Wang, Xuebing
- Abstract
With the popularity of smart devices, people pay more attention to the experience of text input. The authors propose an in‐air digit input system, namely UltraDigit, which enables users to input digits in the air using acoustic signal via transfer learning. Different from other technologies, UltraDigit can obtain the finger movement through a speaker and a microphone built in the smartphone, which does not need the assistance of other hardware. In addition, the authors use the idea of transfer learning with a small amount of data to train classification model, which achieves good performance with low training cost (such as time cost and data cost). Experimental results show the average accuracy of digit recognition is 92.9%, which verifies the validity of the ultrasound signal‐based contactless digit input.
- Subjects
SMART devices; ULTRASONIC imaging; ACOUSTIC signal detection; TEXT recognition; IMAGE recognition (Computer vision)
- Publication
IET Radar, Sonar & Navigation (Wiley-Blackwell), 2023, Vol 17, Issue 11, p1674
- ISSN
1751-8784
- Publication type
Article
- DOI
10.1049/rsn2.12457