Light-Field Retargeting

  • Authors:
  • C. Birklbauer;O. Bimber

  • Affiliations:
  • Institute of Computer Graphics, Johannes Kepler University Linz, Austria;Institute of Computer Graphics, Johannes Kepler University Linz, Austria

  • Venue:
  • Computer Graphics Forum
  • Year:
  • 2012

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Abstract

We present a first approach to light-field retargeting using z-stack seam carving, which allows light-field compression and extension while retaining angular consistency. Our algorithm first converts an input light field into a set of perspective-sheared focal stacks. It then applies 3D deconvolution to convert the focal stacks into z-stacks, and seam-carves the z-stack of the center perspective. The computed seams of the center perspective are sheared and applied to the z-stacks of all off-center perspectives. Finally, the carved z-stacks are converted back into the perspective images of the output light field. To our knowledge, this is the first approach to light-field retargeting. Unlike existing stereo-pair retargeting or 3D retargeting techniques, it does not require depth information. © 2012 Wiley Periodicals, Inc.