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Real-time refocusing using an FPGA-based standard plenoptic camera

  • TrinamiX GmbH (BASF)
    ,
  • University of Washington
    ,
  • University of Wolverhampton
Research Output: Contribution to journal Article Peer-review

Open access

Abstract

Plenoptic cameras are receiving increased attention in scientific and commercial applications because they capture the entire structure of light in a scene, enabling optical transforms (such as focusing) to be applied computationally after the fact, rather than once and for all at the time a picture is taken. In many settings, real-time inter active performance is also desired, which in turn requires significant computational power due to the large amount of data required to represent a plenoptic image. Although GPUs have been shown to provide acceptable performance for real-time plenoptic rendering, their cost and power requirements make them prohibitive for embedded uses (such as in-camera). On the other hand, the computation to accomplish plenoptic rendering is well structured, suggesting the use of specialized hardware. Accordingly, this paper presents an array of switch-driven finite impulse response filters, implemented with FPGA to accomplish high-throughput spatial-domain rendering. The proposed architecture provides a power-efficient rendering hardware design suitable for full-video applications as required in broadcasting or cinematography. A benchmark assessment of the proposed hardware implementation shows that real-time performance can readily be achieved, with a one order of magnitude performance improvement over a GPU implementation and three orders ofmagnitude performance improvement over a general-purpose CPU implementation.

Publication Information

Output type

Research Output: Contribution to journal Article Peer-review

Original language

English

Article number

8322307

Pages from-to (Number of pages)

Pages 9757-9766 (10 pages)

Journal (Volume, Issue Number)

IEEE Transactions on Industrial Electronics (Volume 65, Issue 12)

Publication milestones

  • Published - 22/03/2018

Publication status

Published - 22/03/2018

ISSN

0278-0046

External Publication IDs

  • handle.net: 10547/622714
  • Scopus: 85044269679

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