WhichFingers

Abstract

HCI researchers lack low-latency and robust systems to support the design and development of interaction techniques using finger identification. We developed a low-cost prototype using piezo-based vibration sensors attached to each finger. By combining the events from an input device with the information from the vibration sensors we demonstrate how to achieve low-latency and robust finger identification. Our prototype was evaluated in a controlled experiment, using two keyboards and a touchpad, showing single-touch recognition rates of 98.2% for the keyboard and 99.7% for the touchpad, and 94.7% for two simultaneous touches. These results were confirmed in an additional laboratory-style experiment with ecologically valid tasks. Last we present new interaction techniques made possible using this technology.

TelemetRing: A Batteryless and Wireless Ring-shaped Keyboard using Passive Inductive Telemetry

“…These consist of i) fve rings equipped with shock sensors that can detect subtle shock waves caused by typing motions and ii) a wristband equipped with a readout circuit. The output of the shock sensors is sent to the wristband based on wireless communication methods such as Wi-Fi [23], body channel communication [11], or WISP [5] to detect typing. However, batteries are necessary for each ring to drive the active components (e.g., communication modules); this makes the ring bulky and requires periodic charging.…”

“…First, the typing recognition rate is evaluated with only one person. To understand the recognition rate independent of individuals, we must conduct user studies with more than 10 participants, similar to previous ring-shaped keyboards [11,23]. Such a evaluation will help us to set parameters that can be used by anyone regardless of gender and age.…”

“…As wearable devices (e.g., smartglasses and smartwatches) are being tightly interwoven into our daily lives, an easy-to-carry and always-available input device is desirable to interact with these devices [22,10,35]. A wireless ring-shaped keyboard, which supports text entry by detecting fnger typing, is one of the promising approaches [11,23]. This approach supports text input anytime and anywhere, since (a) the keyboard function is implemented within the form-factor of rings and wristbands, both of which are already widely accepted as accessories and (b) can be used on everyday surfaces (e.g., desk and knee).…”

“…However, previous wireless ring-shaped keyboards required batteries attached to each ring device to empower the active components (e.g., microcontrollers and wireless communication modules) [5,11,23]. The bulky batteries on the ring devices make them uncomfortable to wear and necessitate the users to charge them periodically.…”

DeepFisheye

“…There are various approaches to finger identification, e.g., using color markers [20,68], wearable sensors [6,23,43], magnet [56]. However, wearing sensors or markers would be burdensome during daily activity.…”