Spatial augmented reality (SAR) technology allows one to change the appearance of objects by projecting directly onto their surface without the requirement of wearing glasses, and therefore can be used in many practical applications. In this article, we present a human–subject study, which investigates the research question whether it is possible to use SAR to change one's perception of depth and spatial relationships among objects and humans in a real-world environment. Such projected illusions could open up new possibilities, for example, supporting people who suffer from poor depth perception by compensating distance and size misperceptions. We present three monoscopic projection-based techniques that we adapted from visual arts: (i) color temperature, (ii) luminance contrast, and (iii) blur, and show that each of them can significantly change depth perception, even in a real-world environment when displayed with other distance cues. We discuss practical implications and individual differences in the perception of depth between observers, and we outline future directions to influence and improve human depth perception in the real world.

中文翻译：

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基于投影的空间增强现实中的深度感知和操纵

空间增强现实 (SAR) 技术允许人们通过直接投影到物体表面来改变物体的外观，而无需戴眼镜，因此可用于许多实际应用。在本文中，我们提出了一项人类-受试者研究，该研究调查了是否可以使用 SAR 来改变人们对现实世界环境中物体与人类之间的深度和空间关系的感知的研究问题。这种投射的幻觉可以开辟新的可能性，例如，通过补偿距离和大小的错误感知来支持深度感知不佳的人。我们展示了我们从视觉艺术中改编的三种基于单视场投影的技术：（i）色温，（ii）亮度对比度，以及（iii）模糊，并表明它们中的每一个都可以显着改变深度感知，即使在与其他距离提示一起显示的真实环境中也是如此。我们讨论了观察者之间深度感知的实际意义和个体差异，并概述了影响和改善现实世界中人类深度感知的未来方向。