Title:	A FAST AND SPACE-EFFICIENT DISCRETE FOCAL STACK TRANSFORM
Author(s):	Fernando Pérez Nava, Sergio Fumero
ISBN:	978-972-8939-48-9
Editors:	Yingcai Xiao
Year:	2011
Edition:	Single
Keywords:	Computational Photography, Plenoptic cameras, Lightfield, Focal Stack, Multiview Stereo. 3DTV.
Type:	Full Paper
First Page:	75
Last Page:	82
Language:	English
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Full Contents:	click to dowload
Paper Abstract:	Plenoptic cameras are a promising solution to increase the capabilities of current commercial cameras. They offer the possibility of focusing the scene after the capture of the photograph or to obtain 3D information. The use of plenoptic cameras to record a 3D scene has some benefits with respect to 3D capture systems based on camera arrays since there is no need of geometric and color calibration or frame synchronization. This paper presents a new technique to obtain the focal stack and 3D information from a plenoptic camera that drastically reduces the memory requirements of the previous Fast DFST algorithm without an increase in its computational complexity. From a practical point of view, in typical scenes we are able to decrease more than 60 times the memory needs of the Fast DFST. This new algorithm makes practical to obtain focal and 3D information with very high depth resolution from current plenoptic cameras. The information obtained can be used as the input of some autostereoscopic displays on the market and shows the feasibility of a plenoptic approach to 3DTV.
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