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15 May 2014 Exposure control for HDR video
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Abstract
This paper proposes an algorithm for determining the exposure times for High Dynamic Range (HDR) video by adapting them to the current lighting. Due to the limited capability of the sensor used, only two exposures per frame can be taken. For each image, the histogram for the exposure time of the other image is estimated. When this histogram is subtracted from the original, the result can be used to adjust the exposure time to the current lighting situation by standard exposure control algorithms. The subtraction removes the dynamic range already covered by the other image, thus the exposure time can be optimized for the residual dynamic range. The algorithm has been compared with state-of-the-art algorithms for HDR imaging. It is proven to have comparable results in mean squared error to a ground truth gained from real-world data. Furthermore this algorithm is capable of running during the capturing process of a video, since it doesn't require additional exposures than those already taken.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Bürker, C. Rößing, and H. P. A. Lensch "Exposure control for HDR video", Proc. SPIE 9138, Optics, Photonics, and Digital Technologies for Multimedia Applications III, 913805 (15 May 2014); https://doi.org/10.1117/12.2051127
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