Affiliation:
1. Department of Computer Science and Technology, Tsinghua University; Key Laboratory of Pervasive Computing, Ministry of Education, China
Abstract
We present DRG-Keyboard, a gesture keyboard enabled by dual IMU rings, allowing the user to swipe the thumb on the index fingertip to perform word gesture typing as if typing on a miniature QWERTY keyboard. With dual IMUs attached to the user's thumb and index finger, DRG-Keyboard can 1) measure the relative attitude while mapping it to the 2D fingertip coordinates and 2) detect the thumb's touch-down and touch-up events combining the relative attitude data and the synchronous frequency domain data, based on which a fingertip gesture keyboard can be implemented. To understand users typing behavior on the index fingertip with DRG-Keyboard, we collected and analyzed user data in two typing manners. Based on the statistics of the gesture data, we enhanced the elastic matching algorithm with rigid pruning and distance measurement transform. The user study showed DRG-Keyboard achieved an input speed of 12.9 WPM (68.3% of their gesture typing speed on the smartphone) for all participants. The appending study also demonstrated the superiority of DRG-Keyboard for better form factors and wider usage scenarios. To sum up, DRG-Keyboard not only achieves good text entry speed merely on a tiny fingertip input surface, but is also well accepted by the participants for the input subtleness, accuracy, good haptic feedback, and availability.
Funder
Natural Science Foundation of China
National Key R&D Program of China
Beijing Academy of Artificial Intelligence (BAAI), 2025 Key Technological Innovation Program of Ningbo City
Publisher
Association for Computing Machinery (ACM)
Subject
Computer Networks and Communications,Hardware and Architecture,Human-Computer Interaction
Cited by
4 articles.
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1. ShadowTouch: Enabling Free-Form Touch-Based Hand-to-Surface Interaction with Wrist-Mounted Illuminant by Shadow Projection;Proceedings of the 36th Annual ACM Symposium on User Interface Software and Technology;2023-10-29
2. Understanding In-Situ Programming for Smart Home Automation;Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies;2023-06-12
3. Enabling Voice-Accompanying Hand-to-Face Gesture Recognition with Cross-Device Sensing;Proceedings of the 2023 CHI Conference on Human Factors in Computing Systems;2023-04-19
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