A CMOS video sensor for High Dynamic Range (HDR) imaging

Poonnen, Thomas; Liu, Li; Karia, Kalind; Joyner, Michael; Zarnowski, Jeffrey J.

doi:10.1109/acssc.2008.5074530

Cited by 4 publications

(1 citation statement)

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“…One approach for HDR video is to have groups of neighboring pixels on a sensor use different exposure times [13]. However, this approach results in a loss of spatial resolution and may require deblurring of the longer exposures to properly match the short exposures.…”

Section: Hdr Videomentioning

confidence: 99%

Random coded sampling for high-speed HDR video

Portz

Zhang

Jiang

2013

IEEE International Conference on Computational Photography (ICCP)

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We propose a novel method for capturing high-speed, high dynamic range video with a single low-speed camera using a coded sampling technique. Traditional video cameras use a constant full-frame exposure time, which makes temporal super-resolution difficult due to the ill-posed nature of inverting the sampling operation. Our method samples at the same rate as the traditional low-speed camera but uses random per-pixel exposure times and offsets. By exploiting temporal and spatial redundancy in the video, we can reconstruct a high-speed video from the coded input. Furthermore, the different exposure times used in our sampling scheme enable us to obtain a higher dynamic range than a traditional camera or other temporal superresolution methods. We validate our approach using simulation and provide a detailed discussion on how to make a hardware implementation. In particular, we believe that our approach can maintain a 100% light throughput similarly to existing cameras and can be implemented on a single chip, making it suitable for small form factors.

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Section: Hdr Videomentioning

confidence: 99%