Stereo Day-for-Night: Retargeting Disparity for Scotopic Vision, ACM Transactions on Applied Perception
Presented on Symposium on Applied Perception 2014

Stereo Day-for-Night: Retargeting Disparity for Scotopic Vision

Petr Kellnhofer¹     Tobias Ritschel^1,2     Peter Vangorp¹     Karol Myszkowski¹     Hans-Peter Seidel<sup>1

1</sup>MPI Informatik     ²Saarland University    

Low-light stereo content (~0.01 cd/m²; disparity map with used range bar shown as insets), presented using three different tone mappers: (a) Linear. (b) Common day-for-night color tone mapping [Thompson2002]. (c) Our color and stereo day-for-night approach. Common day-for-night tone mapping reproduces the desaturation, loss of acuity and blue shifts, but results in a mismatching depth impression, which is only perceived in photopic conditions. Our approach matches stereo fidelity to the actual scotopic percept. .

Abstract

Several approaches attempt to reproduce the appearance of a scotopic low-light night scene on a photopic display ("day-for-night") by introducing color desaturation, loss of acuity and the Purkinje shift towards blue colors. We argue that faithful stereo reproduction of night scenes on photopic stereo displays requires manipulation of not only color but also binocular disparity. To this end, we performed a psychophysics experiment to devise a model of disparity at scotopic luminance levels. Using this model, we can match binocular disparity of a scotopic stereo content displayed on a photopic monitor to the disparity that would be perceived if the scene was actually scotopic. The model allows for real-time computation of common stereo content as found in interactive applications such as simulators or computer games.

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Citation

Petr Kellnhofer, Tobias Ritschel, Peter Vangorp, Karol Myszkowski, Hans-Peter Seidel
Stereo Day-for-Night: Retargeting Disparity for Scotopic Vision
ACM Transactions on Applied Perception (TAP) - Special issue SAP 2014.

@article{kellnhofer:2014c:DarkStereo,
  author = { 
	Petr Kellnhofer and
	Tobias Ritschel and
	Peter Vangorp and
	Karol Myszkowski and 
	Hans-Peter Seidel},
  title = {Stereo Day-for-Night: Retargeting Disparity for Scotopic Vision},
  journal = {ACM Trans. Appl. Percept.},
  year = {2014},
  volume = {11},
  number = {3}
}

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