基于偏振的水下目标深度信息获取方法

Polarization-Based Depth Information Acquisition of Underwater Target

随着三维技术在许多相关领域应用日益广泛,目标深度信息精确获取变得日益重要。针对水下应用领域,提出了一种基于偏振的水下目标深度信息获取方法,该方法先通过暗原色先验知识对图像进行背景区域划分,使用背景区域光强计算出后向散射光的偏振度,结合光强和偏振度计算出各像素点的后向散射光强,利用水体光强衰减公式求得各通道的深度信息,进行融合处理得到水下目标深度信息。实验结果表明,该方法能精地获取水下目标的深度信息,且精度和效率优于基于暗原色先验的去雾方法。

With the increasingly wide application of three-dimensional technology in many related fields, it becomes more and more important to accurately acquire the target depth information. A method for acquiring underwater target depth information based on polarization is proposed. Firstly, the background region of image is divided based on dark channel prior, then the polarization of backscattered light is calculated by using the light intensity of background region. The backscattered light intensity of each pixel is calculated in combination of the light intensity and polarization, and the depth information of each channel is obtained with the light intensity attenuation formula of water body, thus acquiring the depth information of underwater target through fusion processing. The experimental results show that the proposed method can accurately acquire the depth information of underwater target with higher accuracy and efficiency than that of the method using dark channal prior.