FlexStylus, a flexible stylus, detects deformation of the barrel as a vector with both a rotational and an absolute value, providing two degrees of freedom with the goal of improving the expressivity of digital art using a stylus device. We outline the construction of the prototype and the principles behind the sensing method, which uses a cluster of four fibreoptic based deformation sensors. We propose interaction techniques using the FlexStylus to improve menu navigation and tool selection. Finally, we describe a study comparing users' ability to match a changing target value using a commercial pressure stylus and the FlexStylus' absolute deformation. When using the FlexStylus, users had a significantly higher accuracy overall. This suggests that deformation may be a useful input method for future work considering stylus augmentation.

Additional Metadata
Keywords Augmented stylus, Bending, Deformation, HCI, Input technique, Pen interaction
Persistent URL dx.doi.org/10.1145/3126594.3126597
Conference 30th Annual ACM Symposium on User Interface Software and Technology, UIST 2017
Fellion, N. (Nicholas), Pietrzak, T. (Thomas), & Girouard, A. (2017). FlexStylus: Leveraging bend input for pen interaction. In UIST 2017 - Proceedings of the 30th Annual ACM Symposium on User Interface Software and Technology (pp. 375–385). doi:10.1145/3126594.3126597