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

The 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.