基于距離選通激光成像技術(shù)的水下目標(biāo)三維成像方法研究
[Abstract]:Range gated laser imaging technology is widely used in underwater environment imaging because of its mature theoretical foundation, high engineering degree and strong environmental adaptability. Therefore, this technique is applied to underwater three-dimensional imaging. Have a great advantage. In this paper, the underwater three-dimensional imaging method based on range-gated laser imaging technology is studied. The echo intensity distribution in range of range-gated imaging system is simulated, and the imaging characteristics of range-gated imaging technology are analyzed. Using the evasive intensity distribution in the imaging range, the curve of the relationship between the pixel gray and the corresponding distance in the new image obtained by the image dot division processing is simulated and calculated. In this paper, the 3D image of the target is obtained by the method of image dot division. The error between the 3D image and the actual object is calculated, and the source of the error is analyzed. It provides the direction for further improving the precision of reconstruction. Experimental results show that the method of image dot division 3D imaging can effectively suppress the surface material of the target in underwater imaging system. The water attenuation and the different angles between the normal direction of the target points and the direction of the incident laser pulse cause the adverse effects on the 3D imaging. At the same time, only two groups of images are needed from the single direction, which reduces the number of image acquisition required. The process of 3D reconstruction is simplified.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TP391.41;TN249
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