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Proceedings Paper

High-speed videography system using a pair of imagers for biological applications
Author(s): Riichi Kajiwara; Ichiro Takashima; Kiyo Murano; Yuka Mimura; Toshio Iijima
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Paper Abstract

This paper describes a high-speed imaging system using dual MOS-based solid-state cameras and its biological application. Our dual camera system can capture images synchronously and produce sets of 64 X 64-pixel images at a rate of 0.6 ms/frame. The system is composed of three blocks: the 'camera- drive,' 'memory,' and 'processor' blocks. We developed these block hardware circuits using an FPGA device in the following manner. (1) Camera-drive block: two cameras were synchronized with the Hd (horizontal drive) and Vd (vertical drive) signals using a 16 MHz clock. (2) Memory block: 12-bit track-and-hold A/D converters were used to digitize the output from both cameras in parallel and store it in frame memory. Each camera had a 16-MB memory capacity. (3) Processor block: image data from both cameras was stored in two separate frame memories. This block simultaneously accessed the same memory address for each frame and calculated the difference in the observed values, which was then transferred to a personal computer. This system enables us to observe pure neural activity from images contaminated with heartbeat noise.

Paper Details

Date Published: 17 April 2001
PDF: 9 pages
Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424258
Show Author Affiliations
Riichi Kajiwara, Electrotechnical Lab. (Japan)
Ichiro Takashima, Electrotechnical Lab. (Japan)
Kiyo Murano, Electrotechnical Lab. (Japan)
Yuka Mimura, Electrotechnical Lab. (Japan)
Toshio Iijima, Electrotechnical Lab. (Japan)

Published in SPIE Proceedings Vol. 4183:
24th International Congress on High-Speed Photography and Photonics
Kazuyoshi Takayama; Tsutomo Saito; Harald Kleine; Eugene V. Timofeev, Editor(s)

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