Cost-effective multi-camera array for high quality video with very high dynamic range

Keinert J, Wetzel M, Schöberl M, Schäfer P, Zilly F, Bätz M, Foessel S, Kaup A (2014)

Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2014

Publisher: SPIE

Book Volume: 9023

Article Number: 90230Y

Event location: San Francisco, CA US

ISBN: 9780819499400

DOI: 10.1117/12.2039563


Temporal bracketing can create images with higher dynamic range than the underlying sensor. Unfortunately, moving objects cause disturbing artifacts. Moreover, the combination with high frame rates is almost unachievâ-able since a single video frame requires multiple sensor readouts. The combination of multiple synchronized side-by-side cameras equipped with different attenuation filters promises a remedy, since all exposures can be performed at the same time with the same duration using the playout video frame rate. However, a disparity correction is needed to compensate the spatial displacement of the cameras. Unfortunately, the requirements for a high quality disparity correction contradict the goal to increase dynamic range. When using two cameras, disparity correction needs objects to be properly exposed in both cameras. In contrast, a dynamic range inâ-crease needs the cameras to capture different luminance ranges. As this contradiction has not been addressed in literature so far, this paper proposes a novel solution based on a three camera setup. It enables accurate deâ-termination of the disparities and an increase of the dynamic range by nearly a factor of two while still limiting costs. Compared to a two camera solution, the mean opinion score (MOS) is improved by 13.47 units in average for the Middleburry images. © 2014 SPIE-IS and T.

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Keinert, J., Wetzel, M., Schöberl, M., Schäfer, P., Zilly, F., Bätz, M.,... Kaup, A. (2014). Cost-effective multi-camera array for high quality video with very high dynamic range. In Proceedings of the Digital Photography X. San Francisco, CA, US: SPIE.


Keinert, Joachim, et al. "Cost-effective multi-camera array for high quality video with very high dynamic range." Proceedings of the Digital Photography X, San Francisco, CA SPIE, 2014.

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