Yubi-Toko: Finger Walking in Snowy Scene using Pseudo-haptic Technique on Touchpad
“Yubi-Toko” is a touchpad system in which users can walk in a snowy scene using their fingers. Users feel the difficulty in moving forward caused as generated by a pseudo-haptic technique.
This study explores the possibility of providing users with a pseudo-haptic effect using a touch panel. Pseudo-haptics encompasses a cross-modal effect between the visual and the haptic senses. The illusion is produced by an appropriate sensory inconsistency between the physical movement of the body and the observed movement of a virtual pointer. However, an overly large discrepancy between the visual and the proprioceptive information makes users feel something "odd". Thus, it is difficult to evoke pseudo-haptics for conventional touch panels because of the noticeable difference in movement between an input finger and a pointer. Another problem is that the pointer on a touch panel is often occluded by the user's finger, making it difficult to use. In this study, we aim to provide users with a pseudo-haptic sensation through a background image instead of a pointer as visual feedback. It is assumed that even if the effect of sensory conflict is small, many of them during repetitive movement would make users feel a pseudo-haptic sensation. We applied this idea to a locomotion interface using anthropomorphic finger motion on a touch panel. By changing the ratio between the displacement of the finger and the amount of scroll of the visual ground, we would like to provide users with pseudo-haptic feedback as the perception of difficulty in moving forward. Walking on the virtual ground by scrolling down the display is a short-term iterative finger movement, and thus, many small inconsistency effects would be effective. The occlusion problem does not occur because the full screen is used as visual feedback.
Yusuke Ujitoko, Yuki Ban, Takuji Narumi, Tomohiro Tanikawa, Koichi Hirota, Michitaka Hirose : Yubi-Toko: Finger Walking in Snowy Scene using Pseudo-haptic Technique on Touchpad, SIGGRAPH Asia 2015 Emerging Technologies, 2015(demo) PDF
宇治土公雄介，伴祐樹，鳴海拓志，谷川智洋，広田光一，廣瀬通孝： Yubi-Toko：タッチパネルにおける擬似触力覚を利用した移動インタフェース，CEATEC 2015, 幕張メッセ, 2015(demo)
宇治土公 雄介: Yubi-Toko, 東京大学制作展 EXTRA 2015「グッバイ・マイ・ボディ」, 東京大学工学部二号館，2015(demo)
宇治土公 雄介: 指人形 雪上を歩く, 第16回東京大学 制作展 2014, 東京大学工学部二号館，2014(demo)
宇治土公雄介，伴祐樹，鳴海拓志，谷川智洋，広田光一，廣瀬通孝： タッチパネル上での反復動作におけるPseudo-haptics, 日本VR学会第20回大会予稿集, 2015(paper)
Yusuke Ujitoko, Koichi Hirota: Impact of Illusory Resistance on Finger Walking Behavior, IEEE VR, 2015(poster)