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For monitoring the night sky conditions, wide-angle all-sky cameras are used in most astronomical observatories to monitor the sky cloudiness. In this manuscript, we apply a deep-learning approach for automating the identification of…

Instrumentation and Methods for Astrophysics · Physics 2025-03-25 Mohammad H. Zhoolideh Haghighi , Alireza Ghasrimanesh , Habib Khosroshahi

For satellite images, the presence of clouds presents a problem as clouds obscure more than half to two-thirds of the ground information. This problem causes many issues for reliability in a noise-free environment to communicate data and…

Computer Vision and Pattern Recognition · Computer Science 2022-12-23 Dale Chen-Song , Erfan Khalaji , Vaishali Rani

Computers are widely utilized in today's weather forecasting as a powerful tool to leverage an enormous amount of data. Yet, despite the availability of such data, current techniques often fall short of producing reliable detailed storm…

Computer Vision and Pattern Recognition · Computer Science 2017-03-08 Yu Zhang , Stephen Wistar , Jia Li , Michael Steinberg , James Z. Wang

The study and prediction of space weather entails the analysis of solar images showing structures of the Sun's atmosphere. When imaged from the Earth's ground, images may be polluted by terrestrial clouds which hinder the detection of solar…

Computer Vision and Pattern Recognition · Computer Science 2024-07-19 Amal Chaoui , Jay Paul Morgan , Adeline Paiement , Jean Aboudarham

Context. The presence of clouds during observations with Imaging Atmospheric Cherenkov Telescopes can strongly affect the performance of the instrument due to additional absorption of light and scattering of light beyond the field of view…

Instrumentation and Methods for Astrophysics · Physics 2024-05-22 Natalia Żywucka , Julian Sitarek , Dorota Sobczyńska , Mario Pecimotika , Dario Hrupec , Dijana Dominis Prester , Lovro Pavletić , Saša Mićanović

Clouds and haze often occlude optical satellite images, hindering continuous, dense monitoring of the Earth's surface. Although modern deep learning methods can implicitly learn to ignore such occlusions, explicit cloud removal as…

Computer Vision and Pattern Recognition · Computer Science 2023-04-13 Patrick Ebel , Vivien Sainte Fare Garnot , Michael Schmitt , Jan Dirk Wegner , Xiao Xiang Zhu

The increasing number of Photovoltaic (PV) systems connected to the power grid are vulnerable to the projection of shadows from moving clouds. Global Solar Irradiance (GSI) forecasting allows smart grids to optimize the energy dispatch,…

Image and Video Processing · Electrical Eng. & Systems 2022-01-04 Guillermo Terrén-Serrano , Manel Martínez-Ramón

Semantic segmentation by convolutional neural networks (CNN) has advanced the state of the art in pixel-level classification of remote sensing images. However, processing large images typically requires analyzing the image in small patches,…

Computer Vision and Pattern Recognition · Computer Science 2020-08-25 Markku Luotamo , Sari Metsämäki , Arto Klami

The increasing deployment of small drones as tools of conflict and disruption has amplified their threat, highlighting the urgent need for effective anti-drone measures. However, the compact size of most drones presents a significant…

Computer Vision and Pattern Recognition · Computer Science 2024-12-24 Hanfang Liang , Jinming Hu , Xiaohuan Ling , Bing Wang

Cloud formations often obscure optical satellite-based monitoring of the Earth's surface, thus limiting Earth observation (EO) activities such as land cover mapping, ocean color analysis, and cropland monitoring. The integration of machine…

Computer Vision and Pattern Recognition · Computer Science 2024-03-18 Aleksis Pirinen , Nosheen Abid , Nuria Agues Paszkowsky , Thomas Ohlson Timoudas , Ronald Scheirer , Chiara Ceccobello , György Kovács , Anders Persson

Dust storms are associated with certain respiratory illnesses across different areas in the world. Researchers have devoted time and resources to study the elements surrounding dust storm phenomena. This paper reviews the efforts of those…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Nurul Rafi , Pablo Rivas

A conditional random field (CRF) model for cloud detection in ground based sky images is presented. We show that very high cloud detection accuracy can be achieved by combining a discriminative classifier and a higher order clique potential…

Image and Video Processing · Electrical Eng. & Systems 2019-06-19 Vijai T. Jayadevan , Jeffrey J. Rodriguez , Alexander D. Cronin

Photovoltaic systems are sensitive to cloud shadow projection, which needs to be forecasted to reduce the noise impacting the intra-hour forecast of global solar irradiance. We present a comparison between different kernel discriminative…

Image and Video Processing · Electrical Eng. & Systems 2021-11-29 Guillermo Terrén-Serrano , Manel Martínez-Ramón

Change detection and irregular object extraction in 3D point clouds is a challenging task that is of high importance not only for autonomous navigation but also for updating existing digital twin models of various industrial environments.…

Computer Vision and Pattern Recognition · Computer Science 2023-12-18 Nikolaos Stathoulopoulos , Anton Koval , George Nikolakopoulos

An automated and reliable processing of bubbly flow images is highly needed to analyse large data sets of comprehensive experimental series. A particular difficulty arises due to overlapping bubble projections in recorded images, which…

Computer Vision and Pattern Recognition · Computer Science 2022-08-08 Hendrik Hessenkemper , Sebastian Starke , Yazan Atassi , Thomas Ziegenhein , Dirk Lucas

Google Earth Engine (GEE) provides a convenient platform for applications based on optical satellite imagery of large areas. With such data sets, the detection of cloud is often a necessary prerequisite step. Recently, deep learning-based…

Image and Video Processing · Electrical Eng. & Systems 2020-10-02 Zhixiang Yin , Feng Ling , Giles M. Foody , Xinyan Li , Yun Du

We use a deep neural network to detect and place region-of-interest boxes around ultracold atom clouds in absorption and fluorescence images---with the ability to identify and bound multiple clouds within a single image. The neural network…

Quantum Gases · Physics 2021-08-03 Lucas R. Hofer , Milan Krstajić , Péter Juhász , Anna L. Marchant , Robert P. Smith

The wide field of view (WFV) imaging system onboard the Chinese GaoFen-1 (GF-1) optical satellite has a 16-m resolution and four-day revisit cycle for large-scale Earth observation. The advantages of the high temporal-spatial resolution and…

Computer Vision and Pattern Recognition · Computer Science 2017-02-07 Zhiwei Li , Huanfeng Shen , Huifang Li , Guisong Xia , Paolo Gamba , Liangpei Zhang

Underwater diving assistance and safety support robots acquire real-time diver information through onboard underwater cameras. This study introduces a breath bubble detection algorithm that utilizes unsupervised K-means clustering, thereby…

Computer Vision and Pattern Recognition · Computer Science 2025-02-25 Mingyu Jeon , Yeonji Paeng , Sejin Lee

We present a framework for cloud characterization that leverages modern unsupervised deep learning technologies. While previous neural network-based cloud classification models have used supervised learning methods, unsupervised learning…