Relativistic ultrafast rendering using time-of-flight imaging
ACM SIGGRAPH 2012 Talks
Frequency analysis of transient light transport with applications in bare sensor imaging
ECCV'12 Proceedings of the 12th European conference on Computer Vision - Volume Part I
ECCV'12 Proceedings of the 12th European conference on Computer Vision - Volume Part VI
Femto-photography: capturing and visualizing the propagation of light
ACM Transactions on Graphics (TOG) - SIGGRAPH 2013 Conference Proceedings
Low-budget transient imaging using photonic mixer devices
ACM Transactions on Graphics (TOG) - SIGGRAPH 2013 Conference Proceedings
Inverse volume rendering with material dictionaries
ACM Transactions on Graphics (TOG)
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Global light transport is composed of direct and indirect components. In this paper, we take the first steps toward analyzing light transport using high temporal resolution information via time of flight (ToF) images. The time profile at each pixel encodes complex interactions between the incident light and the scene geometry with spatially-varying material properties. We exploit the time profile to decompose light transport into its constituent direct, subsurface scattering, and interreflection components. We show that the time profile is well modelled using a Gaussian function for the direct and interreflection components, and a decaying exponential function for the subsurface scattering component. We use our direct, subsurface scattering, and interreflection separation algorithm for four computer vision applications: recovering projective depth maps, identifying subsurface scattering objects, measuring parameters of analytical subsurface scattering models, and performing edge detection using ToF images.