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Inferring Light Fields from Shadows

机译:从阴影推断光场

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We present a method for inferring a 4D light field of a hidden scene from 2D shadows cast by a known occluder on a diffuse wall. We do this by determining how light naturally reflected off surfaces in the hidden scene interacts with the occluder. By modeling the light transport as a linear system, and incorporating prior knowledge about light field structures, we can invert the system to recover the hidden scene. We demonstrate results of our inference method across simulations and experiments with different types of occluders. For instance, using the shadow cast by a real house plant, we are able to recover low resolution light fields with different levels of texture and parallax complexity. We provide two experimental results: a human subject and two planar elements at different depths.
机译:我们提出了一种方法,该方法可以根据已知的遮挡物在漫射墙上投射的2D阴影来推断隐藏场景的4D光场。我们通过确定自然从隐藏场景中的表面反射回来的光如何与遮挡物相互作用来实现此目的。通过将光传输建模为线性系统,并结合有关光场结构的先验知识,我们可以反转系统以恢复隐藏的场景。我们通过不同类型的封堵器在模拟和实验中展示了我们的推理方法的结果。例如,使用真实植物的阴影,我们能够恢复具有不同纹理和视差复杂度的低分辨率光场。我们提供了两个实验结果:一个人体对象和两个深度不同的平面元素。

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