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In this paper, by exploiting the powerful ability of deep learning, we devote to designing a well-performing and pilot-saving neural network for the channel estimation in underwater acoustic (UWA) orthogonal frequency division multiplexing…

Information Theory · Computer Science 2021-03-10 Donghong Ouyang , Yuzhou Li , Zhizhan Wang

A new obstacle detection algorithm for unmanned surface vehicles (USVs) is presented. A state-of-the-art graphical model for semantic segmentation is extended to incorporate boat pitch and roll measurements from the on-board inertial…

Robotics · Computer Science 2020-01-07 Borja Bovcon , Rok Mandeljc , Janez Perš , Matej Kristan

Photometry is a convenient operational method for monitoring such dynamically evolving phenomena as wind waves. Nowadays machine learning allows one to avoid explicit derivation of the solution to the problem, describing all the…

Atmospheric and Oceanic Physics · Physics 2023-03-20 Mikhail B. Salin , Artem V. Vitalsky

The Alternate Wetting and Drying (AWD) method is a rice-growing water management technique promoted as a sustainable alternative to Continuous Flooding (CF). Climate change has placed the agricultural sector in a challenging position,…

Computer Vision and Pattern Recognition · Computer Science 2025-06-10 Ahmed Rafi Hasan , Niloy Kumar Kundu , Saad Hasan , Mohammad Rashedul Hoque , Swakkhar Shatabda

Unmanned surface vehicles (USVs) and boats are increasingly important in maritime operations, yet their deployment is limited due to costly sensors and complexity. LiDAR, radar, and depth cameras are either costly, yield sparse point clouds…

Computer Vision and Pattern Recognition · Computer Science 2025-01-13 Benjamin Kiefer , Yitong Quan , Andreas Zell

Identification of regions affected by floods is a crucial piece of information required for better planning and management of post-disaster relief and rescue efforts. Traditionally, remote sensing images are analysed to identify the extent…

Computer Vision and Pattern Recognition · Computer Science 2022-10-05 Sushant Lenka , Pratyush Kerhalkar , Pranav Shetty , Harsh Gupta , Bhavam Vidyarthi , Ujjwal Verma

Precise Soil Moisture (SM) assessment is essential in agriculture. By understanding the level of SM, we can improve yield irrigation scheduling which significantly impacts food production and other needs of the global population. The…

Computer Vision and Pattern Recognition · Computer Science 2023-03-22 Muhammad Riaz Hasib Hossain , Muhammad Ashad Kabir

Navigation is a critical aspect of autonomous underwater vehicles (AUVs) operating in complex underwater environments. Since global navigation satellite system (GNSS) signals are unavailable underwater, navigation relies on inertial…

Signal Processing · Electrical Eng. & Systems 2025-03-10 Rajini Makam , Nadav Cohen , Sumukh Shadakshari , Srinivasa Puranika Bhatta , Itzik Klein , Suresh Sundaram

In this study, we conduct a comprehensive benchmark of the Safe Reinforcement Learning (Safe RL) algorithms for the task of vision-driven river following of Unmanned Aerial Vehicle (UAV) in a Unity-based photo-realistic simulation…

Robotics · Computer Science 2025-08-14 Zihan Wang , Nina Mahmoudian

This paper proposes a photorealistic real-time dense 3D mapping system that utilizes a learning-based image enhancement method and mesh-based map representation. Due to the characteristics of the underwater environment, where problems such…

Robotics · Computer Science 2024-04-30 Jungwoo Lee , Younggun Cho

Accurate and efficient structural health monitoring of infrastructure objects such as bridges is a vital task, as many existing constructions have already reached or are approaching their planned service life. In this contribution, we…

Computer Vision and Pattern Recognition · Computer Science 2025-08-18 Mehdi Maboudi , Jan Backhaus , Inka Mai , Yahya Ghassoun , Yogesh Khedar , Dirk Lowke , Bjoern Riedel , Ulf Bestmann , Markus Gerke

A procedure for constructing a digital elevation model (DEM) of the northern part of the Volga-Akhtuba interfluve is described. The basis of our DEM is the elevation matrix of Shuttle Radar Topography Mission (SRTM) for which we carried out…

Computer Vision and Pattern Recognition · Computer Science 2019-08-27 Anna Klikunova , Alexander Khoperskov

Terrain elevation modeling for off-road navigation aims to accurately estimate changes in terrain geometry in real-time and quantify the corresponding uncertainties. Having precise estimations and uncertainties plays a crucial role in…

Robotics · Computer Science 2025-08-11 Sanghun Jung , Daehoon Gwak , Byron Boots , James Hays

Accurate and timely mapping of flood extent from high-resolution satellite imagery plays a crucial role in disaster management such as damage assessment and relief activities. However, current state-of-the-art solutions are based on U-Net,…

Computer Vision and Pattern Recognition · Computer Science 2024-09-27 Mirza Tanzim Sami , Da Yan , Saugat Adhikari , Lyuheng Yuan , Jiao Han , Zhe Jiang , Jalal Khalil , Yang Zhou

Obstacle detection plays an important role in unmanned surface vehicles (USV). The USVs operate in highly diverse environments in which an obstacle may be a floating piece of wood, a scuba diver, a pier, or a part of a shoreline, which…

Computer Vision and Pattern Recognition · Computer Science 2015-03-09 Matej Kristan , Vildana Sulic , Stanislav Kovacic , Janez Pers

Underwater image enhancement has been attracting much attention due to its significance in marine engineering and aquatic robotics. Numerous underwater image enhancement algorithms have been proposed in the last few years. However, these…

Computer Vision and Pattern Recognition · Computer Science 2019-11-27 Chongyi Li , Chunle Guo , Wenqi Ren , Runmin Cong , Junhui Hou , Sam Kwong , Dacheng Tao

Floods cause serious problems around the world. Responding quickly and effectively requires accurate and timely information about the affected areas. The effective use of Remote Sensing images for accurate flood detection requires specific…

Computer Vision and Pattern Recognition · Computer Science 2025-04-30 Vladyslav Polushko , Damjan Hatic , Ronald Rösch , Thomas März , Markus Rauhut , Andreas Weinmann

This article presents an analysis of current state-of-the-art sensors and how these sensors work with several mapping algorithms for UAV (Unmanned Aerial Vehicle) applications, focusing on low-altitude and high-speed scenarios. A new…

Robotics · Computer Science 2024-04-02 Jincheng Zhang , Artur Wolek , Andrew R. Willis

High quality Quantitative Precipitation Estimation at high spatiotemporal resolution is crucial to many hydrologic/hydro-meteorological designs. Optimal Quantitative Precipitation Estimation of rainfall improves the accuracy of river and…

Atmospheric and Oceanic Physics · Physics 2021-09-03 Ruhollah Nasiri , Mohamad Sarajzadeh

The Upside-Down Rayleigh-Marchenko (UD-RM) method has recently emerged as a powerful tool for retrieving subsurface wavefields and images free from artifacts caused by both internal and surface-related multiples. Its ability to handle…

Geophysics · Physics 2025-07-30 Ning Wang , Matteo Ravasi , Tariq Alkhalifah