Imaging through Scattering Media Based on Epipolar Constraints

Imaging through scattering media holds great promise for biomedical and measurement applications. In this study, we explore a line-scan imaging strategy through strong scattering media based on epipolar constraints. The implemented setup consists mainly of three parts, namely, the laser source, galvo scanner, and the industrial camera. With pre-calibrated system parameters, a set of epipolar lines are easily generated and projected in sequence with the laser and the galvo scanner projection module, while the epipolar lines on the original images corresponding to the illuminating epipolar lines can be effectively extracted. By stitching the extracted epipolar lines together, a whole image less affected by scattering media can be obtained. We validate our approach using a customized letter pattern obscured by a strong diffuser. Experimental result shows that part of the original signal can be recovered whereas almost no information is shown in the comparison image obtained with the conventional method. Furthermore, the proposed system and algorithm are easier to implement than most existing approaches for imaging through scattering media.