Optical Prior-Based Underwater Object Detection with Active Imaging

Figure 2

Underwater light field distribution. Plane S is perpendicular to the optical axis of the underwater light source, the distance between them being z. The distance between points P and B is denoted as . For any perpendicular plane located at a distance z = z₀ from the underwater light source, the irradiance E(λ) at any point generally decreases with its distance to the optical axis.