Novel infrared touch-screen technology and associated artwork
Novel infrared touch-screen technology and associated artwork
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新颖的红外触摸屏技术和相关艺术品
DOI：
10.1145/1186155.1186176
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Z. Simpson
中科院分区：
文献类型：
--
作者：
Z. Simpson
数字视频图像被投射到半透明的屏幕上。对近红外线敏感的照相机也位于投影屏幕的相对侧。在近侧放置了一个红外线照明器阵列，从倾斜的角度淹没屏幕。站在投影表面的近侧，参与者触摸屏幕以进行交互。因为它们站在照明器和屏幕之间，所以它们投射红外阴影，每个照明器一个。这些阴影会聚在投影屏幕上，形成摄像机可检测到的暗红外区域。使用先前计算的校准，计算机对摄像机图像进行采样，消除扭曲并对其进行过滤，以提取参与者触摸屏幕的位置。与许多其他触摸屏技术不同，该系统允许获得参与者如何触摸屏幕的图像，而不仅仅是找到接触点。
Digital video imagery is rear-projected onto a translucent screen. A camera sensitive to the near infrared is also positioned on the opposite side of the projection screen. On the near side is positioned an array of infrared illuminators which flood the screen from oblique angles. Standing on the near side of the projection surface, participants touch the screen in order to interact. Because they stand between the illuminators and the screen they cast infrared shadows, one for each illuminator. These shadows converge on the projection screen creating dark infrared areas detectable by the camera. Using a previously computed calibration, the computer samples the camera image, de-warping and filtering it in order to extract where the participants are touching the screen. Unlike many other touch screen technologies, this system permits obtaining an image of how the participants are touching the screen as opposed to merely finding a contact point.