Touch Surfaces
"觸覺回饋螢幕"的技術雖然數年前就略有耳聞,近來更已經有廠商將其量產投入商業產品之中,
不過Norman個人孤陋寡聞,一直以為觸控螢幕的觸覺回饋尚僅止於按鈕或靜態模擬,
直到今天在Gigazine看到由Disny研製的"Touch Surfaces"系統其展示影片,
方才曉得.....動態影片或及時攝像,原來亦能做到觸覺反饋!
這不擺明就是要我們把這技術用在奇怪的地方嗎!

(以下內容引述自Disney Research)
.....In this project, we develop and apply a tactile rendering algorithm to simulate rich 3D geometric features
(such as bumps, ridges, edges, protrusions, texture etc.) on touch screen surfaces.
The underlying hypothesis is that when a finger slides on an object then minute surface variations are
sensed
by friction-sensitive mechanoreceptors in the skin.
Thus, modulating the friction forces between the fingertip and the touch surface would create illusion of
surface variations.
We propose that the percept of a 3D “bump” is created when local gradients of the
virtual bump are mapped to lateral friction forces.....
.....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.....
.....

.....


其實個人從官網介紹還是看不太出來是怎麼判定凹凸的.....
數值高程模型(digital elevation models,DTM)這種自帶數據的還能想像,
不過那隻三葉蟲和蘋果的圖要是直接轉灰階當bump map,畫面怎麼還會那麼乾淨呢?
Norman對相關領域的知識不是很了解,只用法向量貼圖的模式來理解好像不是很通 ww
但原理不曉得也無所謂,因為這項技術的出現.....無非完全證明了在下5年前的猜想哪:
Touch Surfaces
加上"能夠感覺到歐派晃動"的觸覺回饋後,完全就是二次元嫁具現化神器!
當初畫出這張圖的作者真是太有眼光、太有遠見了!
Disny若是能與各エロゲー公司、AV片商合作開發,就算還做不到"Dreams Come True",
也絕對有資格讓人們手上的電腦成為"The Happiest Place On Earth"啊~嘶! XD

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