Split aperture imaging for high dynamic range

Manoj Aggarwal, Narendra Ahuja

Research output: Contribution to journalArticlepeer-review

Abstract

Most imaging sensors have limited dynamic range and hence are sensitive to only a part of the illumination range present in a natural scene. The dynamic range can be improved by acquiring multiple images of the same scene under different exposure settings and then combining them. In this paper, we describe a camera design for simultaneously acquiring multiple images. The cross-section of the incoming beam from a scene point is partitioned into as many parts as the required number of images. This is done by splitting the aperture into multiple parts and directing the beam exiting from each in a different direction using an assembly of mirrors. A sensor is placed in the path of each beam and exposure of each sensor is controlled either by appropriately setting its exposure parameter, or by splitting the incoming beam unevenly. The resulting multiple exposure images are used to construct a high dynamic range image. We have implemented a video-rate camera based on this design and the results obtained are presented.

Original languageEnglish (US)
Pages (from-to)7-17
Number of pages11
JournalInternational Journal of Computer Vision
Volume58
Issue number1
DOIs
StatePublished - Jun 2004

Keywords

  • Beam splitting
  • High dynamic range
  • Multiple sensors
  • Split aperture imaging
  • Video-rate imaging

ASJC Scopus subject areas

  • Software
  • Computer Vision and Pattern Recognition
  • Artificial Intelligence

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