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成像触摸屏和体感交互

一种新型的触摸屏技术出现了。TouchLight使用简单的图像处理技术来结合两台摄像机拍摄的内容，而这两台摄像机在用户面前一块半透明的平面后。由此产生的图像就是平面上展现的物体。这种技术非常适合作为一种商用的投影屏幕材料（DNP全息屏幕）运用。它可以在室内照明正常的条件下投射到一个由丙烯酸塑料制成透明透明片状体上。由此产生的触摸屏显示系统将原本普通的丙烯酸塑料转换成一个适用于体感交互技术的高带宽的输入/输出表面。本文对图像处理技术做了详细介绍，并概述了几个关于该系统新功能。

简介：

普通的触摸屏技术功能有限。例如，大多数的触摸屏技术无法在同一时间在屏幕上追踪大量目标，通常他们只报告目标对象的二维位置和一些不是很具体信息。这部分问题的出现是由于特定的硬件实现表面的局限性，反过来又主要是由输入普通GUI交互的仿真指示器导致的。通常情况下，今天的应用程序只能处理一个二维指示器输入。最近推出了一系列的图像触摸屏的概念，在这些概念中不再是一个由离散数据点构成的小列表，而是一个完整的触摸图像的计算，其中每个像素的输出图像都对应这一个触摸屏表面的目标对象。在体感交互中墙壁和表格形式因素的运用已经证明了触摸图像计算的效用。这些系统通过使用一种漫射屏幕材料可以使视频投影和表面感应同时进行。从相机的角度来看，这也只解决了在或非常接近表面的目标对象。

Imaging Touch Screen And Display For Gesture Interaction Technology Essay

A novel touch screen technology is presented. TouchLight uses simple image processing techniques to combine the output of two video cameras placed behind a semi-transparent plane in front of the user. The resulting image shows objects that are on the plane.This technique is well suited for application with a commercially available projection screen material (DNP Holo Screen) which permits projection onto a transparent sheet of acrylic plastic in normal indoor lighting conditions. The resulting touch screen display system transforms an otherwise normal sheet of acrylic plastic into a high bandwidth input/output surface suitable for gesture-based interaction. Image processing techniques are detailed, and several novel capabilities of the system are outlined.

简介：-INTRODUCTION:

Common touch screen technologies are limited in capability. For example, most are not able to track more than a small number of objects on the screen at a time, and typically they report only the 2D position of the object and no shape information. Partly this is due to superficial limitations of the particular hardware implementation, which in turn are driven by the emphasis on emulating pointer input for common GUI interactions. Typically, today's applications are only able to handle one 2D pointer input. A number of systems have recently introduced the concept of imaging touch screens, where instead of a small list of discrete points, a full touch image is computed, where each 'pixel' of the output image indicates the presence of an object on the touch screen's surface. The utility of the touch image thus computed has been demonstrated in gesture-based interactions for application on wall and table form factors.These systems permit simultaneous video projection and surface sensing by using a diffusing screen material which, from the camera view, only resolves those objects that are on or very near the surface.

The touch image produced by these camera-based systems reveals the appearance of the object as it is viewed from behind the surface. Application events may be triggered as the result of image processing techniques applied to the touch image. For example, the appearance or shape of an object may uniquely identify the object to the system and trigger certain application events. In this paper we introduce the Touch Light system, which uses simple computer vision techniques to compute a touch image on a plane situated between a pair of cameras and the user. We demonstrate these techniques in combination with a projection display material which permits the projection of an image onto a transparent sheet of acrylic plastic, and the simultaneous operation of the computer vision processes. Touch Light