Frequency analysis of transient light transport with applications in bare sensor imaging

  • Authors:
  • Di Wu;Gordon Wetzstein;Christopher Barsi;Thomas Willwacher;Matthew O’Toole;Nikhil Naik;Qionghai Dai;Kyros Kutulakos;Ramesh Raskar

  • Affiliations:
  • MIT Media Lab, China, Department of Automation, Tsinghua University, China, Graduate School at Shenzhen, Tsinghua University, China;MIT Media Lab, China;MIT Media Lab, China;Department of Mathematics, Harvard University;Department of Computer Science, University of Toronto, Canada;MIT Media Lab, China;Department of Automation, Tsinghua University, China;Department of Computer Science, University of Toronto, Canada;MIT Media Lab, China

  • Venue:
  • ECCV'12 Proceedings of the 12th European conference on Computer Vision - Volume Part I
  • Year:
  • 2012

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Abstract

Light transport has been analyzed extensively, in both the primal domain and the frequency domain; the latter provides intuition of effects introduced by free space propagation and by optical elements, and allows for optimal designs of computational cameras for tailored, efficient information capture. Here, we relax the common assumption that the speed of light is infinite and analyze free space propagation in the frequency domain considering spatial, temporal, and angular light variation. Using this analysis, we derive analytic expressions for cross-dimensional information transfer and show how this can be exploited for designing a new, time-resolved bare sensor imaging system.