Light-Field Retargeting

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 deconvolutio...

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Vydáno v:	Computer graphics forum Ročník 31; číslo 2pt1; s. 295 - 303
Hlavní autoři:	Birklbauer, C., Bimber, O.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Oxford, UK Blackwell Publishing Ltd 01.05.2012
Témata:	3-D graphics Algorithms Analysis I.3.3 [Computing Methodologies]: Computer Graphics-Picture/Image Generation I.4.9 [Computing Methodologies]: Image Processing and Computer Vision- Applications Image processing systems Light Studies
ISSN:	0167-7055, 1467-8659
On-line přístup:	Získat plný text
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Popis
Shrnutí:	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.
Bibliografie:	ark:/67375/WNG-WVT5VWRB-5 ArticleID:CGF3008 istex:ACD6CBFA781E76E22802A70D9E8315F93740DFB1 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14
ISSN:	0167-7055 1467-8659
DOI:	10.1111/j.1467-8659.2012.03008.x