Mr. Yukinobu Sugiyama Profile

Yukinobu Sugiyama

at Hamamatsu Photonics K. K.

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Proceedings Article | 20 February 2017 Paper

High-speed imaging using CMOS image sensor with quasi pixel-wise exposure

T. Sonoda, H. Nagahara, K. Endo, Y. Sugiyama, R. Taniguchi

Proceedings Volume 10328, 103280A (2017) https://doi.org/10.1117/12.2270485

KEYWORDS: High speed imaging, CMOS sensors, Compressed sensing, Computational imaging, Image sensors, Sensors, Control systems, Video, Camera shutters, Prototyping, Electrons

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Several recent studies in compressive video sensing have realized scene capture beyond the fundamental trade-off limit between spatial resolution and temporal resolution using random space-time sampling. However, most of these studies showed results for higher frame rate video that were produced by simulation experiments or using an optically simulated random sampling camera, because there are currently no commercially available image sensors with random exposure or sampling capabilities. We fabricated a prototype complementary metal oxide semiconductor (CMOS) image sensor with quasi pixel-wise exposure timing that can realize nonuniform space-time sampling. The prototype sensor can reset exposures independently by columns and fix these amount of exposure by rows for each 8x8 pixel block. This CMOS sensor is not fully controllable via the pixels, and has line-dependent controls, but it offers flexibility when compared with regular CMOS or charge-coupled device sensors with global or rolling shutters. We propose a method to realize pseudo-random sampling for high-speed video acquisition that uses the flexibility of the CMOS sensor. We reconstruct the high-speed video sequence from the images produced by pseudo-random sampling using an over-complete dictionary.

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