“Magic Pot: Interactive Metamorphosis of the Perceived Shape” by Ban, Narumi, Tanikawa and Hirose

  • ©Yuki Ban, Takuji Narumi, Tomohiro Tanikawa, and Michitaka Hirose


Entry Number: 14


    Magic Pot: Interactive Metamorphosis of the Perceived Shape



    “Magic Pot” is an interactive system which changes the perceived shape of a physical object by using haptic illusion. Haptics is one of the most important sensations in our life, and many researches have been conducted to realize a device to present virtual haptic sensations. However, because these devices are mainly focus on active haptics which aim to reproduce physical force feedback, they become physically too complicated when we try to reproduce complex haptic sensations to use them easily.

    On the other hand, there are increasing numbers of works which focus on alternative approaches such as passive haptics, which include pseudo-haptics. Pseudo-haptics is a kind of cross modal effect between our visual and haptic sense [1], which indicates an illusional perception in our haptic sensation evoked by vision. This illusion is evoked when we work under an inconsistent situation between the physical behavior of our body and the one observed in our vision. For example, it is revealed that the mismatch between a speed of physical computer mouse and the one of corresponding cursor in display evokes illusional force feedback on our hands. Pseudo-haptic approach is a potential solution for exploiting boundaries and capabilities of the human sensory system to simulate haptic information without physical force feedback.

    In our system, we compose a rendering algorithm of visual feedback to evoke pseudo-haptic effects, which affects our haptic perception about shape. This algorithm compose the visual feedback in which we can observe as if we were touching the virtual shape of the object, and evoke a pseudo-haptic illusion which make us to perceive as if the shape, especially the curvature and the size of the static object changed. By using this algorithm, we realize an interactive metamorphosis in the shape of “Magic Pot” using simple interface to shapen it.


    [1] A. Lecuyer: Simulating Haptic Feedback Using Vision: a Survey of Research and Applications of Pseudo-Haptic Feedback, Presence: Teleoperators and Virtual Environments, MIT Press , Volume 8, Issuel, pp. 39-Si53, 2009.

    [2] S. Schaefer and T. McPhail and J. Warren: Image Deformation Using Moving Least Squares, ACM SIGGRAPH 2006 Papers (SIGGRAPH ’06), ACM, New York, NY, USA, pp.533-540, 2006

Additional Images:

©Yuki Ban, Takuji Narumi, Tomohiro Tanikawa, and Michitaka Hirose ©Yuki Ban, Takuji Narumi, Tomohiro Tanikawa, and Michitaka Hirose


ACM Digital Library Publication:

Overview Page: