Abstract
The image quality might be degraded severely due to water scatterings, especially near-shore water scatterings. In addition, the degraded image reduces the accuracy of underwater 3D reconstruction. We propose an underwater imaging system based on light field camera array to obtain enhanced high-quality images and accurate three-dimensional reconstruction from harsh underwater environments. Both 2D-imaging and 3D-reconstruction using light-field imaging were studied by experiments. By refocusing and analyzing the light field images of the target through turbid water, we obtained accurate three-dimensional estimations in the underwater scene. These experiments confirm the reliability of our method, showing that the SSIM (structural similarity) value of the system in turbid water is 0.378, compared to 0.197, the SSIM value of conventional single-camera imaging in the experiments. Therefore, we verify that the light field imaging system is less affected by forward scattering of water and has a larger detective range than conventional single-camera imaging with any specific resolution.
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