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Multimedia Tools and Applications

, Volume 78, Issue 1, pp 697–711 | Cite as

Scene-adaptive coded aperture imaging

  • Xuehui Wang
  • Feng DaiEmail author
  • Yike Ma
  • Ke Gao
  • Yong Dong Zhang
Article
  • 246 Downloads

Abstract

Coded aperture imaging systems have recently shown great success in recovering scene depth and extending the depth-of-field. Tremendous efforts have been focused on designing good coded patterns. The ideal pattern, however, would have to serve two conflicting purposes: 1) it should be broadband to ensure robust deconvolution and 2) it should have sufficient zero-crossings for a high depth discrepancy. This paper presents a simple but effective scene-adaptive coded aperture solution to bridge this gap. We observe that natural scenes often exhibit a dominant edge direction that can be caused by structure, texture, shading, etc. We therefore apply depth-discriminative codes along the dominant direction and broadband codes along its orthogonal direction. To physically implement this scheme, we adopt a two-shot scheme. Firstly, we capture a scene image with a pinhole aperture and analyze image content to determine the dominant direction. Secondly, we apply the proposed coding scheme using the programmable Liquid Crystal on Silicon (LCoS). Experiments on a broad range of synthetic and real scenes show that our technique is able to combine advantages of the state-of-the-art patterns for recovering better quality depth map and all-focus images.

Keywords

Computational imaging Coded-aperture Depth-from-defocus 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  • Xuehui Wang
    • 1
    • 2
  • Feng Dai
    • 1
    Email author
  • Yike Ma
    • 1
  • Ke Gao
    • 1
  • Yong Dong Zhang
    • 1
  1. 1.Key Lab of Intelligent Information Processing of Chinese Academy of Sciences (CAS)Institute of Computing Technology, CASBeijingChina
  2. 2.Graduate University of Chinese Academy of SciencesBeijingChina

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