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Object detection and classification is one of the most important computer vision problems. Ever since the introduction of deep learning \cite{krizhevsky2012imagenet}, we have witnessed a dramatic increase in the accuracy of this object…

Computer Vision and Pattern Recognition · Computer Science 2018-11-20 Gurjeet Singh , Sun Miao , Shi Shi , Patrick Chiang

Cloud detection from remotely observed data is a critical pre-processing step for various remote sensing applications. In particular, this problem becomes even harder for RGB color images, since there is no distinct spectral pattern for…

Computer Vision and Pattern Recognition · Computer Science 2018-01-29 Savas Ozkan , Mehmet Efendioglu , Caner Demirpolat

Recent advancements in meteorology involve the use of ground-based sky cameras for cloud observation. Analyzing images from these cameras helps in calculating cloud coverage and understanding atmospheric phenomena. Traditionally, cloud…

Computer Vision and Pattern Recognition · Computer Science 2025-01-14 Yijie Li , Hewei Wang , Shaofan Wang , Yee Hui Lee , Muhammad Salman Pathan , Soumyabrata Dev

We present a deep learning model with temporal memory to detect clouds in image time series acquired by the Seviri imager mounted on the Meteosat Second Generation (MSG) satellite. The model provides pixel-level cloud maps with related…

Atmospheric and Oceanic Physics · Physics 2020-12-21 Devis Tuia , Benjamin Kellenberger , Adrian Pérez-Suay , Gustau Camps-Valls

Detecting and masking cloud and cloud shadow from satellite remote sensing images is a pervasive problem in the remote sensing community. Accurate and efficient detection of cloud and cloud shadow is an essential step to harness the value…

Computer Vision and Pattern Recognition · Computer Science 2019-11-12 Ke Xu , Kaiyu Guan , Jian Peng , Yunan Luo , Sibo Wang

We analyze clouds in the earth's atmosphere using ground-based sky cameras. An accurate segmentation of clouds in the captured sky/cloud image is difficult, owing to the fuzzy boundaries of clouds. Several techniques have been proposed that…

Atmospheric and Oceanic Physics · Physics 2020-01-08 Soumyabrata Dev , Atul Nautiyal , Yee Hui Lee , Stefan Winkler

Clouds significantly affect the quality of optical satellite images, which seriously limits their precise application. Recently, deep learning has been widely applied to cloud detection and has achieved satisfactory results. However, the…

Computer Vision and Pattern Recognition · Computer Science 2026-03-06 Shaocong Zhu , Zhiwei Li , Xinghua Li , Huanfeng Shen

Cloud types, as a type of meteorological data, are of particular significance for evaluating changes in rainfall, heatwaves, water resources, floods and droughts, food security and vegetation cover, as well as land use. In order to…

Computer Vision and Pattern Recognition · Computer Science 2023-12-04 Longfeng Nie , Yuntian Chen , Mengge Du , Changqi Sun , Dongxiao Zhang

Segmenting clouds in high-resolution satellite images is an arduous and challenging task due to the many types of geographies and clouds a satellite can capture. Therefore, it needs to be automated and optimized, specially for those who…

Computer Vision and Pattern Recognition · Computer Science 2019-11-19 Giorgio Morales , Alejandro Ramírez , Joel Telles

Sky/cloud images captured by ground-based cameras (a.k.a. whole sky imagers) are increasingly used nowadays because of their applications in a number of fields, including climate modeling, weather prediction, renewable energy generation,…

Computer Vision and Pattern Recognition · Computer Science 2016-06-14 Soumyabrata Dev , Yee Hui Lee , Stefan Winkler

Artifacts in imagery captured by remote sensing, such as clouds, snow, and shadows, present challenges for various tasks, including semantic segmentation and object detection. A primary challenge in developing algorithms for identifying…

Computer Vision and Pattern Recognition · Computer Science 2020-07-31 Scott Workman , M. Usman Rafique , Hunter Blanton , Connor Greenwell , Nathan Jacobs

Cloud detection is a pivotal satellite image pre-processing step that can be performed both on the ground and on board a satellite to tag useful images. In the latter case, it can help to reduce the amount of data to downlink by pruning the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-26 Bartosz Grabowski , Maciej Ziaja , Michal Kawulok , Nicolas Longépé , Bertrand Le Saux , Jakub Nalepa

Clouds frequently cover the Earth's surface and pose an omnipresent challenge to optical Earth observation methods. The vast majority of remote sensing approaches either selectively choose single cloud-free observations or employ a…

Computer Vision and Pattern Recognition · Computer Science 2018-12-04 Marc Rußwurm , Marco Körner

The detection of clouds in satellite images is an essential preprocessing task for big data in remote sensing. Convolutional neural networks (CNNs) have greatly advanced the state-of-the-art in the detection of clouds in satellite images,…

Computer Vision and Pattern Recognition · Computer Science 2021-11-24 Joachim Nyborg , Ira Assent

Being able to effectively identify clouds and monitor their evolution is one important step toward more accurate quantitative precipitation estimation and forecast. In this study, a new gradient-based cloud-image segmentation technique is…

Computer Vision and Pattern Recognition · Computer Science 2018-10-01 Negin Hayatbini , Kuo-lin Hsu , Soroosh Sorooshian , Yunji Zhang , Fuqing Zhang

Cloud and cloud shadow masking is a crucial preprocessing step in hyperspectral satellite imaging, enabling the extraction of high-quality, analysis-ready data. This study evaluates various machine learning approaches, including gradient…

Computer Vision and Pattern Recognition · Computer Science 2025-07-15 Mazen Ali , António Pereira , Fabio Gentile , Aser Cortines , Sam Mugel , Román Orús , Stelios P. Neophytides , Michalis Mavrovouniotis

Different empirical models have been developed for cloud detection. There is a growing interest in using the ground-based sky/cloud images for this purpose. Several methods exist that perform binary segmentation of clouds. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2019-03-18 Soumyabrata Dev , Shilpa Manandhar , Yee Hui Lee , Stefan Winkler

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

Attitude is one of the crucial parameters for space objects and plays a vital role in collision prediction and debris removal. Analyzing light curves to determine attitude is the most commonly used method. In photometric observations,…

Instrumentation and Methods for Astrophysics · Physics 2024-04-03 Hui Li , Rong-Wang Li , Peng Shu , Yu-Qiang Li

We propose a novel deep learning model named ACLNet, for cloud segmentation from ground images. ACLNet uses both deep neural network and machine learning (ML) algorithm to extract complementary features. Specifically, it uses…

Computer Vision and Pattern Recognition · Computer Science 2022-07-14 Dhruv Makwana , Subhrajit Nag , Onkar Susladkar , Gayatri Deshmukh , Sai Chandra Teja R , Sparsh Mittal , C Krishna Mohan