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Due to the absorption and scattering effects of the water, underwater images tend to suffer from many severe problems, such as low contrast, grayed out colors and blurring content. To improve the visual quality of underwater images, we…

Computer Vision and Pattern Recognition · Computer Science 2020-04-21 Hui Li , Xi Yang , ZhenMing Li , TianLun Zhang

Underwater optical imaging is severely degraded by light absorption, scattering, and color distortion, hindering visibility and accurate image analysis. This paper presents an adaptive enhancement framework integrating illumination…

Computer Vision and Pattern Recognition · Computer Science 2025-03-06 Yuezhe Tian , Kangchen Yao , Xiaoyang Yu

Underwater image enhancement plays a crucial role in providing reliable visual information for underwater platforms, since strong absorption and scattering in water-related environments generally lead to image quality degradation. Existing…

Computer Vision and Pattern Recognition · Computer Science 2026-03-18 Yiqiang Zhou , Yifan Chen , Zhe Sun , Jijun Lu , Ye Zheng , Xuelong Li

Underwater imaging plays a pivotal role in marine exploration and ecological monitoring. However, it faces significant challenges of limited transmission bandwidth and severe distortion in the aquatic environment. In this work, to achieve…

Image and Video Processing · Electrical Eng. & Systems 2025-09-30 Linwei Zhu , Junhao Zhu , Xu Zhang , Huan Zhang , Ye Li , Runmin Cong , Sam Kwong

This work proposes a method for underwater image enhancement using the principle of histogram equalization. Since underwater images have a global strong dominant colour, their colourfulness and contrast are often degraded. Before applying…

Image and Video Processing · Electrical Eng. & Systems 2021-09-21 Anushka Yadav , Mayank Upadhyay , Ghanapriya Singh

Image compression under ultra-low bitrates remains challenging for both conventional learned image compression (LIC) and generative vector-quantized (VQ) modeling. Conventional LIC suffers from severe artifacts due to heavy quantization,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Lei Lu , Yize Li , Yanzhi Wang , Wei Wang , Wei Jiang

Underwater images often suffer from severe color distortion, low contrast, and a hazy appearance due to wavelength-dependent light absorption and scattering. Simultaneously, existing deep learning models exhibit high computational…

Computer Vision and Pattern Recognition · Computer Science 2025-12-08 Munsif Ali , Najmul Hassan , Lucia Ventura , Davide Di Bari , Simonepietro Canese

Underwater images are severely degraded by wavelength-dependent light absorption and scattering, resulting in color distortion, low contrast, and loss of fine details that hinder vision-based underwater applications. To address these…

Computer Vision and Pattern Recognition · Computer Science 2025-12-18 Afrah Shaahid , Muzammil Behzad

Images acquired during underwater activities suffer from environmental properties of the water, such as turbidity and light attenuation. These phenomena cause color distortion, blurring, and contrast reduction. In addition, irregular…

Image and Video Processing · Electrical Eng. & Systems 2022-08-09 Claudio D. Mello , Bryan U. Moreira , Paulo J. O. Evald , Paulo L. Drews , Silvia S. Botelho

In this paper, we propose a novel approach for underwater image color correction based on a Tikhonov type optimization model in the CIELAB color space. It presents a new variational interpretation of the complementary adaptation theory in…

Computer Vision and Pattern Recognition · Computer Science 2020-10-22 Yuchen He

High-quality underwater images are essential for both machine vision tasks and viewers with their aesthetic appeal.However, the quality of underwater images is severely affected by light absorption and scattering. Deep learning-based…

Computer Vision and Pattern Recognition · Computer Science 2025-07-10 Jiangzhong Cao , Zekai Zeng , Xu Zhang , Huan Zhang , Chunling Fan , Gangyi Jiang , Weisi Lin

Images captured underwater often suffer from suboptimal illumination settings that can hide important visual features, reducing their quality. We present a novel single-image low-light underwater image enhancer, L^2UWE, that builds on our…

Computer Vision and Pattern Recognition · Computer Science 2020-11-09 Tunai Porto Marques , Alexandra Branzan Albu

Underwater imaging grapples with challenges from light-water interactions, leading to color distortions and reduced clarity. In response to these challenges, we propose a novel Color Balance Prior \textbf{Guided} \textbf{Hyb}rid…

Computer Vision and Pattern Recognition · Computer Science 2025-01-07 Xiaojiao Guo , Xuhang Chen , Shuqiang Wang , Chi-Man Pun

Images captured underwater are often characterized by low contrast, color distortion, and noise. To address these visual degradations, we propose a novel scheme by constructing an adaptive color and contrast enhancement, and denoising…

Computer Vision and Pattern Recognition · Computer Science 2021-08-03 Xinjie Li , Guojia Hou , Kunqian Li , Zhenkuan Pan

To assist underwater object detection for better performance, image enhancement technology is often used as a pre-processing step. However, most of the existing enhancement methods tend to pursue the visual quality of an image, instead of…

Computer Vision and Pattern Recognition · Computer Science 2023-02-07 Yanling Qiu , Qianxue Feng , Boqin Cai , Hongan Wei , Weiling Chen

Underwater images often have severe quality degradation and distortion due to light absorption and scattering in the water medium. A hazed image formation model is widely used to restore the image quality. It depends on two optical…

Image and Video Processing · Electrical Eng. & Systems 2019-06-21 Wei Song , Yan Wang , Dongmei Huang , Antonio Liotta , Cristian Perra

The difficulties of underwater image degradation due to light scattering, absorption, and fog-like particles which lead to low resolution and poor visibility are discussed in this study report. We suggest a sophisticated hybrid strategy…

Computer Vision and Pattern Recognition · Computer Science 2024-10-21 Yugandhar Reddy Gogireddy , Jithendra Reddy Gogireddy

Underwater images often suffer from quality degradation due to absorption and scattering effects. Most existing underwater image enhancement algorithms produce a single, fixed-color image, limiting user flexibility and application. To…

Computer Vision and Pattern Recognition · Computer Science 2024-10-01 Xiaofeng Cong , Jing Zhang , Yeying Jin , Junming Hou , Yu Zhao , Jie Gui , James Tin-Yau Kwok , Yuan Yan Tang

Underwater images suffer from color casts and low contrast due to wavelength- and distance-dependent attenuation and scattering. To solve these two degradation issues, we present an underwater image enhancement network via medium…

Computer Vision and Pattern Recognition · Computer Science 2021-05-26 Chongyi Li , Saeed Anwar , Junhui Hou , Runmin Cong , Chunle Guo , Wenqi Ren

Underwater images are degraded by the selective attenuation of light that distorts colours and reduces contrast. The degradation extent depends on the water type, the distance between an object and the camera, and the depth under the water…

Computer Vision and Pattern Recognition · Computer Science 2020-12-23 Chau Yi Li , Riccardo Mazzon , Andrea Cavallaro
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