Numerical simulation of underwater inhomogeneous illumination

One of the key problem in underwater imaging detection is to overcome backscatter effect. It causes the decrease of image quality. Under normal illumination condition high power in the close range engender great backscatter and low power in the far distance limit detection range. In order to solve this problem, an inhomogeneous illumination system was built. The power distribution of inhomogeneous illumination is inverse proportion of the underwater light attenuation. The Monte Carlo method was used to simulated the power distribution of underwater light in this paper. And the simulated result has been used to design the detection system. The system was tested and verified by the underwater imaging experiments, showing that it is effective to decrease the backscatter noise to increase the detection distance.