距离选通水下成像中基于等水体后向散射光能量的目标搜索方法

Target searching method based on equal energy of water backscattering light in range-gated underwater imaging system

研究了距离选通水下成像系统中基于等水体后向散射光能量的目标搜索方法,建立了ICCD接收水体后向散射光能量计算模型,给出了单次成像时ICCD接收水体后向散射光能量的计算公式。通过控制系统成像时的开门时刻和选通门宽,使得系统每次成像时接收到的水体后向散射光能量相等,确定了基于等水体后向散射光目标搜索方法的搜索策略,并给出了搜索策略的仿真计算结果。利用在某次成像中,目标存在会导致系统接收信号光能量增大的特点,给出了目标存在的判别准则,仿真计算结果验证了所提出的判别准则的正确性。

T he target searching method based on the equal energy of water backscattering light in range-gated underwater imaging system was studied. Computing model of water backscattering light energy received by ICCD was built, and the formula of water backscattering light power received by ICCD was deduced in a single imaging. The energy of water backscattering light received by ICCD at any imaging could be equal by controlling the moment and the time of ICCD opening gate. And then, the searching strategy based on the equal energy of water backscattering light could be established, the simulation result of the searching strategy was given. The judgment rule of target existence was given which the signal energy received by ICCD would be enhanced at a certain imaging if the target existed. The simulation result proves the right of the judgment function rule.