Enhanced imaging through turbid water based on quadrature lock-in discrimination and retinex aided by adaptive gamma function for illumination correction

被引：2

作者：

Tehseen, Riffat ^{[1
]}

Ali, Amjad ^{[1
]}

Mane, Mithilesh ^{[1
]}

Ge, Wenmin ^{[1
]}

Li, Yanlong ^{[1
]}

Zhang, Zejun ^{[1
,2
,3
]}

Xu, Jing ^{[1
,2
,3
]}

机构：

[1] Zhejiang Univ, Ocean Coll, Opt Commun Lab, Zhoushan 316021, Peoples R China

[2] Zhejiang Univ, Hainan Inst, Sanya 572000, Peoples R China

[3] Zhejiang Univ, Ocean Coll, Key Lab Ocean Observat Imaging Testbed Zhejiang Pr, Zhoushan 316021, Peoples R China

来源：

CHINESE OPTICS LETTERS | 2023年 / 21卷 / 10期

基金：

中国国家自然科学基金;

关键词：

quadrature lock -in discrimination; clear vision; scattering; retinex; uneven illumination; ALGORITHMS;

D O I：

10.3788/COL202321.101102

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This paper presents an improved method for imaging in turbid water by using the individual strengths of the quadrature lock-in discrimination (QLD) method and the retinex method. At first, the high-speed QLD is performed on images, aiming at capturing the ballistic photons. Then, we perform the retinex image enhancement on the QLD-processed images to enhance the contrast of the image. Next, the effect of uneven illumination is suppressed by using the bilateral gamma function for adaptive illumination correction. The experimental results depict that the proposed approach achieves better enhancement than the existing approaches, even in a high-turbidity environment.

引用

页数：6