Wang Meishu, Qiu Su, Jin Weiqi, Yang Jie
MOE Key Laboratory of Optoelectronic Imaging Technology and System, Beijing Institute of Technology, Beijing 100081, China.
Sensors (Basel). 2023 Aug 26;23(17):7446. doi: 10.3390/s23177446.
To address the problem of water surface detection imaging equipment being susceptible to water surface glints, this study demonstrates a method called De-Glints for suppressing glints and obtaining clear underwater images using a division of focal plane (DoFP) polarimeter. Based on the principle of polarization imaging, the best polarization angle and the image corresponding to the minimal average gray level of each pixel are calculated. To evaluate the improvement in image quality, the index was designed. The results of indoor and outdoor experiments show that the error of the angle calculation of this method is within 10%, and the minimum error is only 3%. The index is positively improved and can be relatively improved by 8.00 under the interference of strong outdoor glints, and the method proposed in this paper shows a good adaptive ability to the dynamic scene.
为了解决水面检测成像设备易受水面反光影响的问题，本研究展示了一种名为去反光（De-Glints）的方法，该方法使用焦平面分割（DoFP）偏振计来抑制反光并获取清晰的水下图像。基于偏振成像原理，计算出最佳偏振角以及每个像素平均灰度级最小对应的图像。为了评估图像质量的提升，设计了该指标。室内和室外实验结果表明，该方法的角度计算误差在10%以内，最小误差仅为3%。该指标得到了积极改善，在强室外反光干扰下可相对提高8.00，本文提出的方法对动态场景显示出良好的自适应能力。
