Evaluation of Input/Output Interface using Wrinkles on Clothes
(pp036-054)
Kentaro Ueda, Tsutomu Terada, and Masahiko Tsukamoto
doi:
https://doi.org/10.26421/JDI1.1-3
Abstracts:
Wearable computing has
created textile-based interfaces utilizing the interaction between
the user and cloth for operation, as well as the touch and the pinch
input operation. The user wears and uses the device in various
postures, environments, and operating positions that affect the
operation speed and accuracy. However, no study has assessed such
factors of touching and pinching using the same input interface. One
of the textile interfaces has an input interface using wrinkles on
clothes. A ridge of cloth produces a wrinkle that forms naturally on
clothes, and the shape of these wrinkles can be recognized by their
tactile sensations. Additionally, the act touching or pinching
wrinkles does not look strange to an onlooker, which reach that
wrinkles have the potential suitable for the wearable computing
operation. To reveal the potential, this paper evaluates the input
performance using wrinkles on clothes. We designed three touch input
methods and one pinch input method for the operation using wrinkles.
We implemented the input and the output device which use wrinkles
and carried out four evaluations. The results indicated that the
pinch input reached the highest accuracy of 98\%
of four input methods after learning. The narrowing-down selection
reached the fastest input time of 1.64 seconds of four methods after
learning. The long press touch and the pinch input achieved the
accuracy of 90\%
or more in all combination of operating environments and device
positions. According to the result of the wrinkle recognition, users
have a high accuracy of the identification of wrinkles of 89.4\%
and recognize their shape in approximately 12 seconds.
Key words: Textile interface,Wrinkles,Wearable
computing, Performance evaluation