Geometrically correct imagery for teleconferencing

Ruigang Yang, M. S. Brown, W. Seales, H. Fuchs
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引用次数: 16

Abstract

Current camera-monitor teleconferencing applications produce unrealistic imagery and break any sense of presence for the participants. Other capture/display technologies can be used to provide more compelling teleconferencing. However, complex geometries in capture/display systems make producing geometrically correct imagery difficult. It is usually impractical to detect, model and compensate for all effects introduced by the capture/display system. Most applications simply ignore these issues and rely on the user acceptance of the camera-monitor paradigm. This paper presents a new and simple technique for producing geometrically correct imagery for teleconferencing environments. The necessary image transformations are derived by finding a mapping between a capture and display device for a fixed viewer location. The capture/display relationship is computed directly in device coordinates and completely avoids the need for any intermediate, complex representations of screen geometry, capture and display distortions, and viewer location. We describe our approach and demonstrate it via several prototype implementations that operate in real-time and provide a substantially more compelling sense of presence than the standard teleconferencing paradigm.
用于远程会议的几何正确图像
目前的摄像机监控远程会议应用产生了不现实的图像,打破了参与者的存在感。其他捕获/显示技术可用于提供更引人注目的电话会议。然而,在捕获/显示系统中,复杂的几何形状使得生成几何上正确的图像变得困难。对捕获/显示系统引入的所有影响进行检测、建模和补偿通常是不切实际的。大多数应用程序简单地忽略了这些问题,并依赖于用户对摄像机-监视器范例的接受。本文提出了一种新的和简单的技术来产生几何正确的图像用于远程会议环境。通过查找用于固定查看器位置的捕获设备和显示设备之间的映射,推导出必要的图像转换。捕获/显示关系直接在设备坐标中计算,完全避免了对屏幕几何形状、捕获和显示扭曲以及观看者位置的任何中间复杂表示的需要。我们描述了我们的方法,并通过几个实时操作的原型实现进行了演示,这些实现提供了比标准电话会议范例更引人注目的存在感。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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