Open AccessRange-intensity-profile prior dehazing method for underwater range-gated imaging
Author(s) -
Minmin Wang,
Xinwei Wang,
Yue Zhang,
Liang Sun,
Pingshun Lei,
Yuqing Yang,
Jianan Chen,
Jun He,
Yan Zhou
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.417131
Subject(s) - underwater , backscatter (email) , optics , intensity (physics) , transmission (telecommunications) , range (aeronautics) , noise (video) , image quality , signal to noise ratio (imaging) , remote sensing , geology , computer science , materials science , physics , computer vision , image (mathematics) , telecommunications , oceanography , composite material , wireless
This paper is concerned with the mitigation of backscatter effects in a single gated image. A range-intensity-profile prior dehazing method is proposed to estimate scene depth and finely remove water backscatter at different depths for underwater range-gated imaging. It is based on the prior that the target intensity is distributed with range intensity profiles in gated images. The depth transmission and depth-noise map are then calculated from the scene depth. A high-quality image is restored by subtracting the depth-noise map and dividing the depth transmission. The simulation and experimental results show that the proposed method works well even if a portion of the estimated depth may be smaller than its real value, and the peak signal-to-noise ratio of dehazing images gets up to a doubled increase.