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Range estimation by optical differentiation
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I3D '03 Proceedings of the 2003 symposium on Interactive 3D graphics
Polyhedral Visual Hulls for Real-Time Rendering
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A Fourier Theory for Cast Shadows
IEEE Transactions on Pattern Analysis and Machine Intelligence
ACM SIGGRAPH 2005 Papers
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ACM SIGGRAPH 2005 Papers
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ACM SIGGRAPH 2005 Papers
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ACM SIGGRAPH 2006 Papers
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ACM SIGGRAPH 2006 Papers
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ACM Transactions on Graphics (TOG)
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ACM SIGGRAPH 2007 papers
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ACM SIGGRAPH 2007 papers
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ACM SIGGRAPH ASIA 2009 Courses
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ACM SIGGRAPH 2009 Courses
ACM SIGGRAPH Asia 2010 papers
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ACM Transactions on Graphics (TOG)
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ACM Transactions on Graphics (TOG)
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ACM Transactions on Graphics (TOG) - SIGGRAPH 2013 Conference Proceedings
ACM Transactions on Graphics (TOG) - SIGGRAPH 2013 Conference Proceedings
3D reconstruction of intricate objects using planar cast shadows
ACM SIGGRAPH 2013 Posters
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We describe a unified representation of occluders in light transport and photography using shield fields: the 4D attenuation function which acts on any light field incident on an occluder. Our key theoretical result is that shield fields can be used to decouple the effects of occluders and incident illumination. We first describe the properties of shield fields in the frequency-domain and briefly analyze the "forward" problem of efficiently computing cast shadows. Afterwards, we apply the shield field signal-processing framework to make several new observations regarding the "inverse" problem of reconstructing 3D occluders from cast shadows -- extending previous work on shape-from-silhouette and visual hull methods. From this analysis we develop the first single-camera, single-shot approach to capture visual hulls without requiring moving or programmable illumination. We analyze several competing camera designs, ultimately leading to the development of a new large-format, mask-based light field camera that exploits optimal tiled-broadband codes for light-efficient shield field capture. We conclude by presenting a detailed experimental analysis of shield field capture and 3D occluder reconstruction.