報告者：吳柏瑤
報告PPT：20181011書報討論_吳柏瑤
文獻題目：FairLift: Interaction with Mid-Air Images on Water Surface
文獻作者：Yu Matsuura / Naoya Koizumi (The University of Electro-Communications)
文獻來源：
- Siggraph emerging technology 2018
- Demo影片
- SIGGRAPHetech_20181009_Fairlift
文獻摘要：
FairLift is an interaction system involving mid-air images, which are visible to the naked eye under and on a water surface. In this system, the water surface reflects the light from micro-mirror array plates, and a mid-air image appears. The system enables a user to interact with the mid-air image by controlling the image position of a light-source display from the water level measured with an ultrasonic sensor. The contributions of this system are enriching interaction with mid-air images and addressing the limitations of conventional water-display systems.
一般來說真正的浮空投影受限於物理現象並無法真實存在，常見的作法都是將影像投影在看似透明材質的物體上，使觀賞者能同時看到影像及真實環境，誤以為影像浮在半空中。一般常會利用半反射鏡斜放(金字塔或倒金字塔型)、氣(霧)幕、水簾、全息膜甚至黑紗網等方式達成。Electro-Communications大學則直接利用投影機投影在水面產生浮空視覺效果。為了讓使用者能有互動，且看起來具有深度，則需於使用者上方加置深度感測器來偵測手的位置及深度，再依其資訊改變投影內容物的位置及尺寸，達到擬真互動效果。
中文解說出處：歐尼克斯實境互動工作室(OmniXRI)
http://omnixri.blogspot.com/2018/08/siggraph-2018-emerging-technologies.html
