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Optical touch sensing: practical bounds for design and performance

机译:光学触摸感应:设计和性能的实际界限

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Touch sensitive screens are used in many applications ranging in size from smartphones and tablets to display walls and collaborative surfaces. In this study, we consider optical touch sensing, a technology best suited for large-scale touch surfaces. Optical touch sensing utilizes cameras and light sources placed along the edge of the display. Within this framework, we first find a sufficient number of cameras necessary for identifying a convex polygon touching the screen, using a continuous light source on the boundary of a circular domain. We then find the number of cameras necessary to distinguish between two circular objects in a circular or rectangular domain. Finally, we use Matlab to simulate the polygonal mesh formed from distributing cameras and light sources on a circular domain. Using this, we compute the number of polygons in the mesh and the maximum polygon area to give us information about the accuracy of the configuration. We close with summary and conclusions, and pointers to possible future research directions.
机译:触摸屏在许多应用中使用,范围从智能手机和平板电脑到显示墙和协作表面的大小。在这项研究中,我们考虑了光学触摸感应,这是最适合大规模触摸表面的技术。光学触摸感应利用沿显示屏边缘放置的摄像头和光源。在此框架内,我们首先在圆形区域边界上使用连续光源,找到足够数量的摄像机来识别触摸屏幕的凸多边形。然后,我们找到在圆形或矩形域中区分两个圆形对象所必需的摄像机数量。最后,我们使用Matlab来模拟由在圆形域上分布相机和光源形成的多边形网格。使用此方法,我们可以计算网格中多边形的数量和最大多边形面积,以提供有关配置精度的信息。我们以总结和结论作为结尾,并指出可能的未来研究方向。

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