Acta Optica Sinica, Volume. 40, Issue 21, 2111002(2020)
Algorithm for Underwater Polarization Imaging Based on Global Estimation
In order to realize the clear imaging of underwater targets with high degree of polarization (HDOP), the traditional polarization imaging model is analyzed. Based on the Schechner polarization imaging model and the definition of polarization degree, a polarization imaging restoration algorithm is proposed to globally estimate the polarization degree of backscattered light, which considers the polarization degree of reflected light of targets. The polarization imaging experiment is conducted, in which the polarization images of three kinds of targets in turbid water with different concentrations are restored. The restoration results show that the measure of enhancement value of the restored image is increased by more than 90% compared to the original Schechner algorithm. Meanwhile, the average gradient, standard deviation and information entropy of image grey are also increased. The restoration results of different polarization images of targets show that the proposed algorithm is not only suitable for the underwater targets with low degree of polarization (LDOP) and rough surfaces, but also makes the underwater targets with HDOP and smooth surfaces gain satisfactory restoration effect.
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Fei Feng, Guojun Wu, Yafeng Wu, Yuhong Miao, Bo Liu. Algorithm for Underwater Polarization Imaging Based on Global Estimation[J]. Acta Optica Sinica, 2020, 40(21): 2111002
Category: Imaging Systems
Received: Jun. 8, 2020
Accepted: Jul. 15, 2020
Published Online: Oct. 17, 2020
The Author Email: Wu Guojun (wuguojun@opt.ac.cn)