Results 41 to 50 of about 101,868 (267)

An Underwater SLAM System using Sonar, Visual, Inertial, and Depth Sensor

, 2019
This paper presents a novel tightly-coupled keyframe-based Simultaneous Localization and Mapping (SLAM) system with loop-closing and relocalization capabilities targeted for the underwater domain.
Li, Alberto Quattrini, Rahman, Sharmin, Rekleitis, Ioannis   +2 more
core   +1 more source

Real-time Model-based Image Color Correction for Underwater Robots

, 2020
Recently, a new underwater imaging formation model presented that the coefficients related to the direct and backscatter transmission signals are dependent on the type of water, camera specifications, water depth, and imaging range.
Li, Alberto Quattrini, Roznere, Monika
core   +1 more source

MSFE-UIENet: A Multi-Scale Feature Extraction Network for Marine Underwater Image Enhancement

Journal of Marine Science and Engineering
Underwater optical images have outstanding advantages for short-range underwater target detection tasks. However, owing to the limitations of special underwater imaging environments, underwater images often have several problems, such as noise ...
Shengya Zhao, Xinkui Mei, Xiufen Ye, Shuxiang Guo   +3 more
doaj   +1 more source

MCCA-Net: Multi-color convolution and attention stacked network for Underwater image classification

Cognitive Robotics, 2022
Underwater images are serious problems affected by the absorption and scattering of light. At present, the existing sharpening methods can't effectively solve all underwater image degradation problems, thus it is necessary to propose a specific solution ...
Peixin Qu, Tengfei Li, Guohou Li, Zhen Tian, Xiwang Xie, Wenyi Zhao, Xipeng Pan, Weidong Zhang   +7 more
doaj   +1 more source

A holographic system for subsea recording and analysis of plankton and other marine particles [PDF]

, 2003
We report here details of the design, development, initial testing and field-deployment of the HOLOMAR system for in-situ subsea holography and analysis of marine plankton and nonliving particles.
Alexander, S, Chalvidan, V, Craig, G, Diard, A, Foresti, GL, Gentili, S, Hendry, DC, Hobson, PR, Lampitt, RS, Nareid, H, Nebrensky, JJ, Pescetto, A, Pieroni, GG, Player, MA, Saw, K, Serpico, S, Tipping, K, Trucco, A, Watson, J   +18 more
core   +1 more source

Underwater Image Enhancement Based on Hybrid Enhanced Generative Adversarial Network

Journal of Marine Science and Engineering, 2023
In recent years, underwater image processing has played an essential role in ocean exploration. The complexity of seawater leads to the phenomena of light absorption and scattering, which in turn cause serious image degradation problems, making it ...
Danmi Xu, Jiajia Zhou, Yang Liu, Xuyu Min   +3 more
doaj   +1 more source

Efficient Approach for OS-CFAR 2D Technique Using Distributive Histograms and Breakdown Point Optimal Concept applied to Acoustic Images [PDF]

, 2019
In this work, a new approach to improve the algorithmic efficiency of the Order Statistic-Constant False Alarm Rate (OS-CFAR) applied in two dimensions (2D) is presented.
Acosta, Gerardo Gabriel, Menna, Bruno Victorio, Torcida, Sebastián, Villar, Sebastian Aldo   +3 more
core   +2 more sources

Underwater Image Restoration via Contrastive Learning and a Real-World Dataset

Remote Sensing, 2022
Underwater image restoration is of significant importance in unveiling the underwater world. Numerous techniques and algorithms have been developed in recent decades. However, due to fundamental difficulties associated with imaging/sensing, lighting, and
Junlin Han, Mehrdad Shoeiby, Tim Malthus, Elizabeth Botha, Janet Anstee, Saeed Anwar, Ran Wei, Mohammad Ali Armin, Hongdong Li, Lars Petersson   +9 more
doaj   +1 more source

Tumor‐stromal crosstalk and macrophage enrichment are associated with chemotherapy response in bladder cancer

FEBS Open Bio, EarlyView.
Chemoresistance in bladder cancer: Macrophage recruitment associated with CXCL1, CXCL5 and CXCL8 expression is characteristic of Gemcitabine/Cisplatin (Gem/Cis) Non‐Responder tumors (right side) while Responder tumors did not show substantial tumor‐stromal crosstalk (left side). All biological icons are attributed to Bioicons: carcinoma, cancerous‐cell‐
Sophie Leypold, Janik Riese, Lancelot Seillier, Mark Kühnel, Julia Pannhausen, Charlotte O. J. Fröhlich, Christian Martin, Peter Boor, Matthias Saar, Danny D. Jonigk, Nadine T. Gaisa, Michael Rose   +11 more
wiley   +1 more source

Integrating deep learning and traditional image enhancement techniques for underwater image enhancement

IET Image Processing, 2022
Underwater images usually suffer from colour distortion, blur, and low contrast, which hinder the subsequent processing of underwater information. To address these problems, this paper proposes a novel approach for single underwater images enhancement by
Zhenghao Shi, Yongli Wang, Zhaorun Zhou, Wenqi Ren   +3 more
doaj   +1 more source