4.7 Article

Dark Stereo: Improving Depth Perception Under Low Luminance

Journal

ACM TRANSACTIONS ON GRAPHICS
Volume 41, Issue 4, Pages -

Publisher

ASSOC COMPUTING MACHINERY
DOI: 10.1145/3528223.3530136

Keywords

depth perception; binocular disparity; stereo constancy; contrast constancy; low luminance; mesopic vision; screenspace postprocessing

Funding

  1. European Union's Horizon 2020 research and innovation programme, under the Marie Sklodowska-Curie grant [765911]
  2. European Research Council (ERC) [725253]
  3. European Research Council (ERC) [725253] Funding Source: European Research Council (ERC)

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This paper introduces a model and contrast enhancement algorithm that can improve the accuracy of binocular depth cues under low brightness, allowing high-quality stereoscopic images to be displayed even at very low luminance.
It is often desirable or unavoidable to display Virtual Reality (VR) or stereoscopic content at low brightness. For example, a dimmer display reduces the flicker artefacts that are introduced by low-persistence VR headsets. It also saves power, prolongs battery life, and reduces the cost of a display or projection system. Additionally, stereo movies are usually displayed at relatively low luminance due to polarization filters or other optical elements necessary to separate two views. However, the binocular depth cues become less reliable at low luminance. In this paper, we propose a model of stereo constancy that predicts the precision of binocular depth cues for a given contrast and luminance. We use the model to design a novel contrast enhancement algorithm that compensates for the deteriorated depth perception to deliver good-quality stereoscopic images even for displays of very low brightness.

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