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Modern ground-based telescopes rely on a technology called adaptive optics (AO) in order to compensate for the loss of image quality caused by atmospheric turbulence. Next-generation AO systems designed for a wide field of view require a…

Numerical Analysis · Mathematics 2015-11-24 Tapio Helin , Stefan Kindermann , Daniela Saxenhuber

We employ the IllustrisTNG simulation data to investigate the turbulent and thermal motions of the cosmic baryonic fluid. With continuous wavelet transform techniques, we define the pressure spectra, or density-weighted velocity power…

Cosmology and Nongalactic Astrophysics · Physics 2024-09-12 Yun Wang , Ping He

Large aperture ground based solar telescopes allow the solar atmosphere to be resolved in unprecedented detail. However, observations are limited by Earths turbulent atmosphere, requiring post image corrections. Current reconstruction…

Solar and Stellar Astrophysics · Physics 2025-06-06 Christoph Schirninger , Robert Jarolim , Astrid M. Veronig , Christoph Kuckein

Adverse weather conditions can negatively affect LiDAR-based object detectors. In this work, we focus on the phenomenon of vehicle gas exhaust condensation in cold weather conditions. This everyday effect can influence the estimation of…

Computer Vision and Pattern Recognition · Computer Science 2022-07-26 Aldi Piroli , Vinzenz Dallabetta , Marc Walessa , Daniel Meissner , Johannes Kopp , Klaus Dietmayer

The performance of leaning-based perception algorithms suffer when deployed in out-of-distribution and underrepresented environments. Outdoor robots are particularly susceptible to rapid changes in visual scene appearance due to dynamic…

Computer Vision and Pattern Recognition · Computer Science 2025-07-02 Peter Mortimer , Mirko Maehlisch

Atmospheric turbulence severely degrades video quality by introducing distortions such as geometric warping, blur, and temporal flickering, posing significant challenges to both visual clarity and temporal consistency. Current…

Computer Vision and Pattern Recognition · Computer Science 2025-08-18 Zhiming Liu , Nantheera Anantrasirichai

Deflection of light along the optical path is a major source of image degradation for ground-based telescopes. Methods have been developed to measure upper atmospheric seeing based on models of the turbulence in the atmosphere, but due to…

Instrumentation and Methods for Astrophysics · Physics 2025-08-04 Meghan A. Marangola , Elana K. Urbach , Christopher W. Stubbs

Adverse weather conditions such as haze, rain, and snow often impair the quality of captured images, causing detection networks trained on normal images to generalize poorly in these scenarios. In this paper, we raise an intriguing question…

Computer Vision and Pattern Recognition · Computer Science 2022-09-07 Yongzhen Wang , Xuefeng Yan , Kaiwen Zhang , Lina Gong , Haoran Xie , Fu Lee Wang , Mingqiang Wei

In recent years, deep learning methods bring incredible progress to the field of object detection. However, in the field of remote sensing image processing, existing methods neglect the relationship between imaging configuration and…

Computer Vision and Pattern Recognition · Computer Science 2021-01-19 Nuo Xu , Chunlei Huo , Jiacheng Guo , Yiwei Liu , Jian Wang , Chunhong Pan

We present a deep-learning approach to restore a sequence of turbulence-distorted video frames from turbulent deformations and space-time varying blurs. Instead of requiring a massive training sample size in deep networks, we purpose a…

Computer Vision and Pattern Recognition · Computer Science 2018-08-14 Wai Ho Chak , Chun Pong Lau , Lok Ming Lui

In many applications of long-range imaging, we are faced with a scenario where a person appearing in the captured imagery is often degraded by atmospheric turbulence. However, restoring such degraded images for face verification is…

Computer Vision and Pattern Recognition · Computer Science 2023-07-26 Kangfu Mei , Vishal M. Patel

Magnetic Resonance Imaging generally requires long exposure times, while being sensitive to patient motion, resulting in artifacts in the acquired images, which may hinder their diagnostic relevance. Despite research efforts to decrease the…

Image and Video Processing · Electrical Eng. & Systems 2025-02-04 Paolo Angella , Vito Paolo Pastore , Matteo Santacesaria

Deep convolutional neural networks have achieved exceptional results on multiple detection and recognition tasks. However, the performance of such detectors are often evaluated in public benchmarks under constrained and non-realistic…

Computer Vision and Pattern Recognition · Computer Science 2022-03-23 Yuhang Lu , Touradj Ebrahimi

Video deblurring presents a considerable challenge owing to the complexity of blur, which frequently results from a combination of camera shakes, and object motions. In the field of video deblurring, many previous works have primarily…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Haoyang Long , Yan Wang , Wendong Wang

With increased adoption of supervised deep learning methods for processing and analysis of cosmological survey data, the assessment of data perturbation effects (that can naturally occur in the data processing and analysis pipelines) and…

Images captured from a long distance suffer from dynamic image distortion due to turbulent flow of air cells with random temperatures, and thus refractive indices. This phenomenon, known as image dancing, is commonly characterized by its…

Computer Vision and Pattern Recognition · Computer Science 2024-08-30 Ripon Kumar Saha , Esen Salcin , Jihoo Kim , Joseph Smith , Suren Jayasuriya

Capturing images under extremely low-light conditions poses significant challenges for the standard camera pipeline. Images become too dark and too noisy, which makes traditional enhancement techniques almost impossible to apply. Recently,…

Computer Vision and Pattern Recognition · Computer Science 2021-11-23 Ahmet Serdar Karadeniz , Erkut Erdem , Aykut Erdem

Turbulence mitigation (TM) is highly ill-posed due to the stochastic nature of atmospheric turbulence. Most methods rely on multiple frames recorded by conventional cameras to capture stable patterns in natural scenarios. However, they…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Xiaoran Zhang , Jian Ding , Yuxing Duan , Haoyue Liu , Gang Chen , Yi Chang , Luxin Yan

We experimentally study a nonlinear optical approach to selective manipulation and detection of structured images mixed with turbulent noise. Unlike any existing adaptive-optics method by applying compensating modulation directly on the…

Optics · Physics 2020-10-21 He Zhang , Santosh Kumar , Yu-Ping Huang

Object Detection has been a significant topic in computer vision. As the continuous development of Deep Learning, many advanced academic and industrial outcomes are established on localising and classifying the target objects, such as…

Computer Vision and Pattern Recognition · Computer Science 2019-07-31 Yingwei Zhou