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- W2009959688 abstract "In this work we develop a new algorithm, that extends the bidimensional Fast Digital Radon transform fromGotz and Druckmuller (1996), to digitally simulate the refocusing of a 4D light field into a 3D volume ofphotographic planes, as previously done by Ren Ng et al. (2005), but with the minimum number of operations.This new algorithm does not require multiplications, just sums, and its computational complexity is O(N 4 ) toachieve a volume consisting of 2N photographic planes focused at different depths, from a N 4 plenoptic image.This reduced complexity allows for the acquisition and processing of a plenoptic sequence with the purpose ofestimating 3D shape at video rate. Examples are given of implementations on GPU and CPU platforms. Finally,a modified version of the algorithm to deal with domains of sizes different than power of two, is proposed." @default.
- W2009959688 created "2016-06-24" @default.
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- W2009959688 date "2011-02-10" @default.
- W2009959688 modified "2023-10-16" @default.
- W2009959688 title "Fast approximate 4D:3D discrete Radon transform, from light field to focal stack with O(N4) sums" @default.
- W2009959688 doi "https://doi.org/10.1117/12.872359" @default.
- W2009959688 hasPublicationYear "2011" @default.
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