Abstract
Scattering and turbulence are the main factors affecting imaging in natural water environment. A new model for underwater turbulent degradation is obtained by calculating the scattering transfer factors including the intensity distribution of beam propagation, turbulent fluid medium and suspended particle. In order to verify the proposed model, a controlled laboratory simulation system of turbulent water is established, from which the degradation transfer factor is measured and compared by image restoration and reconstruction. The new model is also applied for field tests in natural ocean water. Experimental results show that based on the proposed model, effect of image restoration and reconstruction can be substantially improved, which proves the correctness and validity of the model.
Highlights
The light beam transmitted in water will be attenuated due to the absorption and scattering of water
THEORY Considering the turbulence as an optical system, the optical transfer function of underwater imaging system can be obtained by calculating the scattering transfer factors including beam propagation, turbulent fluid medium and the suspended particle
The presented effort proposed a new degradation model for underwater imaging, including the beam propagation transfer factor calculated by intensity distribution, turbulent fluid medium transfer factor calculated by wave structure function and the suspended particle scattering transfer factor calculated by Muller matrix
Summary
The light beam transmitted in water will be attenuated due to the absorption and scattering of water. The degradation factors of the turbulent water body mainly include the scattering of the turbulent fluid medium and that of the suspended particles. The new model is dedicated to the study of scattering of suspended particles and fluid in turbulent water bodies. A new degradation model is proposed, which considers the scattering degradation factors of beam propagation, turbulent fluid medium and suspended particle. THEORY Considering the turbulence as an optical system, the optical transfer function of underwater imaging system can be obtained by calculating the scattering transfer factors including beam propagation, turbulent fluid medium and the suspended particle
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