VIDEO: Disney develops tactile rendering of 3D surfaces on touch surfaces 10/07/2013 - 00:00 To validate our approach, we used an electro-vibration based friction display to modulate the friction forces between the touch surface and the sliding finger. We first determined a psychophysical relationship between the voltage applied to the display and the subjective strength of friction forces, and then used this function to render friction forces directly proportional to the gradient (slope) of the surface being rendered. In a pair-wise comparison study, we showed that users are at least three times more likely to prefer the proposed slope-model than other commonly used models. Our algorithm is concise, light and easily applicable on static images and video streams.
