基于自适应背景光提取的水下偏振去散射成像方法(特邀)

Underwater Polarization Descattering Imaging Method Based on Adaptive Background Light Extraction(Invited)

水下成像技术在水下目标探测和识别领域具有重大研究价值,而传统水下偏振成像技术往往无法同时满足成像质量与成像实时性。针对传统水下偏振去散射成像带来的数据量大、处理时间长等问题,提出了一种水下目标的快速、实时去散射清晰化偏振成像方法。该方法利用了背景光偏振度与目标光偏振度的差异性,用于自适应的快速获取背景散射光区域,同时延续了目标整体偏振度一致这一假设,利用加权直方图均匀化方法通过调整图像灰度级的动态范围,对不同频次的灰度级进行加权处理,得到更符合人眼视觉效果的图像。实验结果表明,快速水下偏振去散射技术在提升成像质量的同时有效的增快了处理时的运算速率,在水下工作中具有良好的应用前景。

Underwater imaging technology has great research value in the field of underwater target detection and recognition,but the traditional underwater polarization imaging method often cannot meet the imaging quality and real-time performance simultaneously.In order to solve the problems of large amount of data and long process-ing time caused by traditional underwater polarization descattering imaging,a fast and real-time descattering and sharpness polarization imaging method for underwater targets is proposed.This method makes use of the difference between the polarization degree of the background light and the polarization degree of the target light,which is used to obtain the background scattered light area adaptively and quickly.At the same time,it continues the assumption that the overall polarization degree of the target is consistent.By adjusting the dynamic range of the image gray lev-el,the weighted histogram homogenization method is used to weight the gray levels of different frequencies,so as to obtain an image that is more in line with the visual effect of human eyes.Experimental results show that the fast un-derwater polarization descattering technology can improve the imaging quality and effectively increase the process-ing speed,so it has a good application prospect in underwater work.