Clemens Birklbauer, Oliver Bimber,
, in The Eurographics Association and Blackwell Publishing Ltd.: Eurographics 2012 (Computer Graphics Forum), in Computer Graphics Forum, Vol. 31, Nummer 2, John Wiley & Sons, Inc., Seite(n) 295?303, 5-2012, ISSN: 0167-7055
Sprache des Titels:
Eurographics 2012 (Computer Graphics Forum)
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.