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Eye-Safe Projection System with Flexible Architecture

机译：具有灵活架构的人眼安全投影系统

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摘要

Nowadays multimedia projectors of various types are widely used in many areas of human life. Significant part of all projector devices are used in two main areas: education (e. g. on lectures) and business (e. g. on all sorts of meetings). What makes projector a demanded device? It provides a user with high quality full color large diagonal image for a much lower price than display devices that based on other popular non-projecting technologies. However the absolute majority of projectors share a significant disadvantage. If human steps into the beam two major negative effects appear: a distorted image appears on human's body and human's eyes become glared by bright light. The first effect is undesirable by the audience and the second effect is undesirable by the presenter. To avoid the abovementioned effects short throw projectors can be used but they are more expensive than regular ones and have significant limitations on the placement spot: usually the lens of a short-throw projector is designed so that it has to be placed on a fixed distance to the screen. We propose a different solution of similar problem: instead of moving the projector towards the screen let us black out the human (or other obstacle) from it. To do so our system must know the exact position of human. In this paper we propose a system with flexible architecture that realizes the above-mentioned solution.
机译：如今，各种类型的多媒体投影仪已广泛应用于人类生活的许多领域。所有投影仪设备的重要部分用于两个主要领域：教育（例如，讲座）和商务（例如，各种会议）。是什么使投影仪成为必需的设备？与基于其他流行的非投影技术的显示设备相比，它以低得多的价格为用户提供了高质量的全彩大对角线图像。但是，绝大部分的投影机都有一个明显的缺点。如果人类进入光束，则会出现两个主要的负面影响：扭曲的图像出现在人体上，明亮的光线使人的眼睛眩光。第一种效果是观众不希望看到的，而第二种效果则是演讲者不希望看到的。为了避免上述效果，可以使用短距投影仪，但它们比普通的投影仪昂贵，并且对放置位置有明显的限制：通常，短距投影仪的镜头设计成必须固定放置一定距离到屏幕。我们提出了类似问题的另一种解决方案：不要将投影机移向屏幕，而是让我们遮挡住人（或其他障碍物）。为此，我们的系统必须知道人类的确切位置。在本文中，我们提出了一种具有灵活架构的系统，可以实现上述解决方案。

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