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Proceedings Paper

Application of one-dimensional high-speed video camera system to motion analysis
Author(s): Naoki Yokoyama; Tsuneyoshi Uyemura
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Paper Abstract

This paper describes application of versatile one-dimensional high-speed video camera system to motion analysis. This system consists of linear-image sensor, frame memory and personal computer. This linear-image sensor scans object image onedimensionally at the rate of 2 MHz(maximum), and outputs analog signal to the interface between this sensor and the frame memory.The interface then adds horizontal and vertical synchronization signals to simulate NTSC-like composite video signal at the lower sampling rate for frame memory. This frame memory has resolutions of 5 1 2(H)X5 1 2(V)X25 6(I) and reconstructs 5 1 2 dots' intensity distribution into a line, then 480 line images become a full two-dimensional image on framememory. At the maximum speed, sampling clock is 2.048 MHz, so shortest sampling period between line-scannings is 250 micro seconds. This is not so high speed compared with traditional streak cameras. But resultant images can be digitized and stored in the memory. Therefore various image-analysis and motion analysis can be performed with personal computer. Experiments were performed to test this video-recording camera. The object was movement of Z-axis linear stage driven by stepping motor (1 micro meter/pulse), which is totally controlled by host computer. The video-camera was operated at 512 KHz to 2.048 MHz. The resultant trajectory stored on frame-memory was timedisplacement characteristic of object. Because no moving part is included in this camera, synchronization between camera and object can be done in microseconds precision. And recording speed of the camera system can be switched in every horizontal scan. So object's displacement in one scan can be adjusted to be about pixel separation of the image sensor, therefore quantum error due to spatial digitization can be SPIE Vol. 1358 19th International Congress on High-Speed Photography and Photon/cs (1990) / 351 minimized. In addition experimental results can be observed and analyzed immediately after recording.

Paper Details

Date Published: 1 April 1991
PDF: 7 pages
Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); doi: 10.1117/12.23949
Show Author Affiliations
Naoki Yokoyama, Fujitsu Labs. Ltd. (Japan)
Tsuneyoshi Uyemura, Tokai Univ. (Japan)

Published in SPIE Proceedings Vol. 1358:
19th Intl Congress on High-Speed Photography and Photonics
Peter W. W. Fuller, Editor(s)

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