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논문 기본 정보

자료유형
학술저널
저자정보
Sung-Min Park (Korea Maritime & Ocean University) Chang-je Lee (Korea Maritime & Ocean University) Dae-Kyeong Kong (Samsung Electronics) Kwang-il Hwang (Korea Maritime & Ocean University) Deog-Hee Doh (Korea Maritime & Ocean University) Gyeong-Rae Cho (Korea Maritime & Ocean University)
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제35권 제3호(통권 제160호)
발행연도
2021.6
수록면
183 - 190 (8page)

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초록· 키워드

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Tomographic particle image velocimetry (PIV) is a widely used method that measures a three-dimensional (3D) flow field by reconstructing camera images into voxel images. In 3D measurements, the setting and calibration of the camera"s mapping function significantly impact the obtained results. In this study, a camera self-calibration technique is applied to tomographic PIV to reduce the occurrence of errors arising from such functions. The measured 3D particles are superimposed on the image to create a disparity map. Camera self-calibration is performed by reflecting the error of the disparity map to the center value of the particles. Vortex ring synthetic images are generated and the developed algorithm is applied. The optimal result is obtained by applying self-calibration once when the center error is less than 1 pixel and by applying self-calibration 2–3 times when it was more than 1 pixel; the maximum recovery ratio is 96%. Further self-correlation did not improve the results. The algorithm is evaluated by performing an actual rotational flow experiment, and the optimal result was obtained when self-calibration was applied once, as shown in the virtual image result. Therefore, the developed algorithm is expected to be utilized for the performance improvement of 3D flow measurements.

목차

ABSTRACT
1. Introduction
2. Camera Calibration
3. Performance Evaluation Using Experimental Data
4. Conclusion
References

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