中国激光, 2020, 47 (5): 0510002, 网络出版: 2020-05-12
水下目标激光成像的可视化模型 下载: 1408次
Model for Visualization of Laser Imaging of Underwater Targets
光谱学 主动激光成像 可视化模型 蒙特卡罗方法 几何光学近似 多次散射 spectroscopy active laser imaging visualization model Monte Carlo method geometrical optical approximation multiple scattering
摘要
为直观、全面、系统地分析设备参数、水体光学传输特性和目标反射特性对水下激光主动成像的影响,为水下光电成像系统的设计优化提供可视化参考依据,建立了水下激光主动成像的可视化模型。该模型基于蒙特卡罗方法追踪整个水下成像过程中光子的状态变化,分别采用几何光学近似和随机碰撞原理模拟随机粗糙表面和水体悬浮粒子对光的散射,并通过高斯物像公式获得最终的仿真图像,实现水下目标激光成像的可视化。为验证仿真结果,对在实验室受控水箱环境中获得的实际图像与相同参数条件下的模拟图像进行比较。结果表明,仿真图像与实验图像具有相同的特征及变化规律,表明该模型较好地模拟了水下激光主动成像的过程,准确度较高、可用性较好。
Abstract
In this work, a model for the visualization of active laser imaging of underwater targets is established. The model can be used to analyze the effect of equipment parameters, water optical transmission properties, and target reflection characteristics on the active underwater laser imaging system in a direct, comprehensive, and systematic manner and provide a visual reference for further optimization of underwater optical imaging systems. The model employs the Monte Carlo method to track the state changes of photons during the entire underwater imaging process. The scattering of light by random rough surface was simulated using geometrical optics approximation. Furthermore, the random collision principle was used to simulate the process of scattering of light by particles suspended in water. Finally, a two-dimensional image was obtained using the Gauss formula, which enables the visualization of underwater target laser imaging. To verify the simulation results, the actual images obtained in the laboratory's controlled water tank were compared with the simulated images under the same parameters. The results show that the simulation images have the same characteristics and change rules as the actual images. The results show that the model can simulate the process of underwater laser active imaging well, with high accuracy and availability.
管风, 韩宏伟, 张晓晖. 水下目标激光成像的可视化模型[J]. 中国激光, 2020, 47(5): 0510002. Feng Guan, Hongwei Han, Xiaohui Zhang. Model for Visualization of Laser Imaging of Underwater Targets[J]. Chinese Journal of Lasers, 2020, 47(5): 0510002.