Vol. 9, Special Issue, December 2010, pp.118-126

Three Dimensional Measurement of Aquatic Organisms Using a Single Video Camera

^1*Kikuhito KAWASUE, ¹Satoshi NAGATOMO and ²Yuichiro OYA

¹University of Miyazaki, 1-1 Gakuen Kibanadai Nishi, Miyazaki, 889-2192, Japan

²Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki

^*Tel.: (81)985-58-7583, fax: (81)985-58-7583

E-mail: kawasue@cc.miyazaki-u.ac.jp

Received: 27 September 2010   /Accepted: 30 November 2010   /Published: 30 December 2010

Abstract: A three-dimensional measurement system that uses a single video camera is introduced. By setting an optical device composed of a beam-splitter and coupled mirror on the camera lens, measuring points which appear on the image plane, are displaced according to the depth. By rotating the optical device at high speed during the video camera exposure, these measuring points are shifted and appeared to be annular streaks on an image plane. Since the size of an annular streak is inversely proportional to the depth from the camera, the depth can be measured easily by processing the circular image. In the case that the measuring points are dense, streaks on the image plane would be overlapped each other. The centerline recorded with circular streak is used for the streak extraction. The streak can be extracted easily from the overlapped images utilizing the centerline.

In this paper, the experimental results of the position tracking of aquatic organisms are introduced.

Keywords: Three-dimensional measurement, Stereoscopy, Image processing, Video camera, Artemia

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