Passive underwater polarization imaging detection method in neritic area

作者：Yi Wei, Liu Fei, Kui Yang, Ping-Li Han, Xinhua Wang, Shao Xiao-Peng · 发表于：Acta Physica Sinica · 年份：2018 · DOI：10.7498/aps.67.20180692 · 被引用次数：17 · 研究领域：Image Enhancement Techniques、Color Science and Applications、Advanced Image Fusion Techniques

Underwater imaging is widely applied to mariculture, archaeology, and hydrocarbon exploration, because it can provide the information about visualized target. Among various underwater imaging techniques, polarization imaging is of particular interest to us, due to its simple system structure and low cost. It images the waterbody through using the polarization characteristics of light, specifically, the background light and target light. Active polarization imaging method illuminates a target scene with an artificial polarized light source to provide polarization information for imaging. But in neritic area, active imaging leads to complex light scattering conditions when artificial light and natural light are superimposed together, which further leads to poor image quality. Passive underwater polarization imaging attempts to recover a clear image by utilizing the polarization characteristics of background light and target light. However, serious color cast always appears in the final image, resulting from light absorbed by water, which may further result in target distortion. In this manuscript, we present a passive underwater polarization imaging method for detecting a target in neritic area. A depth-information-based underwater Lambertian reflection model is established by incorporating the depth information into the traditional Lambertian reflection model. First, we attribute the light changes in color and brightness of a Lambertian surface to the spatial variation of the ...