Abstract
Circular dynamic stereoscopy (CDS) has special advantages for 3-D measurement as it uses a single CCD camera without cumbersome settings. In CDS, annular streaks are recorded, with their size inversely proportional to the depth/distance of the measuring point from the CCD camera. Therefore three-dimensional information can be measured automatically by image processing techniques. When the measuring points are relatively dense, streaks on the image plane overlap, making automatic processing difficult. To cope with this problem, one of the coupled mirrors is replaced by a beam splitter. The annular streaks and their corresponding center positions are then recorded on the same image as the displacement. The recording of the center positions helps in resolving the overlapping annular streaks.
In this paper, principle, calibration method and application for fluid measurement is introduced. Experimental results are presented to demonstrate the feasibility of our method.
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Kikuhito Kawasue: He received the Bachelor’s, Master’s, and Doctorate degrees in mechanical engineering from Nagasaki University, Nagasaki, Japan, in 1987, 1989, and 1996, respectively. He had been with Sasebo National College of Technology from 1989 to 2000, Sasebo, Japan, where he started to work in the area of automatic measurement using computer vision. During 1992–1993, he was a visiting researcher at Florida State University, Tallahassee, where began developing the 3-D flow measurement. He has been currently an associate professor in the mechanical systems engineering department, University of Miyazaki, Miyazaki, Japan and continued to work on computer vision system.
Yuichiro Ohya: He received B.Eng. (1994) in Mechanical systems engineering from Nagasaki university. He has been worked as a researcher and an engineer in West Japan Fluid Engineering Laboratory since 1994, Nagasaki, Japan.
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Kawasue, K., Ohya, Y. Compact vision using circular dynamic stereoscopy with a beam splitter. J Vis 9, 189–197 (2006). https://doi.org/10.1007/BF03181762
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DOI: https://doi.org/10.1007/BF03181762