28 October 2009 Influence of underwater 3D imaging precision by water light scattering
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Abstract
In three-dimensional (3-D) imaging measurement, the center location extraction of laser bar is one of the critical techniques in determining the metrical precision of the system. The width and brightness of laser bar varying with the change of detection distance is an important factor which influences on the center location determination of laser bar. The underwater 3-D imaging quality is directly affected by light scattering effect of water. Under coordinate conditions, the width increase and brightness decrease of laser bar brings great impact on the metrical precision of the system. In this paper, the beam spread characteristics of underwater laser transferring procedure is studied and the relationship among the beam spread characteristics of underwater laser transferring, laser beam characteristics and correlative parameters of water is constituted. Finally, based on the existing relationship between beam width and beam characteristics in 3-D imaging measurement, the factors which affect the precision of underwater 3-D measurement are obtained by computing beam spread function of underwater laser transferring under diverse conditions. Calculation result shows that the metrical precision enhances for the improvement of water clarity as well as the reduction of detection distance.
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Wei Zhang, Wei Zhang, Kecheng Yang, Kecheng Yang, Min Xia, Min Xia, Wei Li, Wei Li, Jiajie Tan, Jiajie Tan, } "Influence of underwater 3D imaging precision by water light scattering", Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 75140N (28 October 2009); doi: 10.1117/12.846508; https://doi.org/10.1117/12.846508
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