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HEALPix -- the Hierarchical Equal Area isoLatitude Pixelization -- has become a standard in high-energy and gravitational wave astronomy. Originally developed to improve the efficiency of all-sky Fourier analyses, it is now also utilized to…

Instrumentation and Methods for Astrophysics · Physics 2022-05-18 I. Martinez-Castellanos , Leo P. Singer , E. Burns , D. Tak , Alyson Joens , Judith L. Racusin , Jeremy S. Perkins

Several supervised networks exist that remove haze information from underwater images using paired datasets and pixel-wise loss functions. However, training these networks requires large amounts of paired data which is cumbersome, complex…

Computer Vision and Pattern Recognition · Computer Science 2023-06-06 Praveen Kandula , A. N. Rajagopalan

Measuring alignment between language and vision is a fundamental challenge, especially as multimodal data becomes increasingly detailed and complex. Existing methods often rely on collecting human or AI preferences, which can be costly and…

Computer Vision and Pattern Recognition · Computer Science 2025-11-04 Hyojin Bahng , Caroline Chan , Fredo Durand , Phillip Isola

I developed a new pure-python pipeline to reduce photometric and polarimetric data: ASTROPOP. It has been designed and optimized to work fully automated with the IAGPOL polarimeter of Pico dos Dias observatory (OPD, Brazil) and can reduce…

Instrumentation and Methods for Astrophysics · Physics 2018-12-26 Julio Cesar Neves Campagnolo

In this paper, we present feature-based technique for construction of mosaic image from underwater video sequence, which suffers from parallax distortion due to propagation properties of light in the underwater environment. The most of the…

Computer Vision and Pattern Recognition · Computer Science 2014-11-11 Nagaraja S. , Prabhakar C. J. , Praveen Kumar P. U

Large, high-resolution space-based imaging surveys produce a volume of data that is difficult to present to the public in a comprehensible way. While megapixel-sized images can still be printed out or downloaded via the World Wide Web, this…

Astrophysics · Physics 2010-11-11 K. Jahnke , S. F. Sanchez , A. Koekemoer

The quality of images captured in outdoor environments can be affected by poor weather conditions such as fog, dust, and atmospheric scattering of other particles. This problem can bring extra challenges to high-level computer vision tasks…

Computer Vision and Pattern Recognition · Computer Science 2019-04-19 Jiaxi He , Frank Z. Xing , Ran Yang , Cishen Zhang

In an era where astronomical data is expanding at an unprecedented rate, the importance of data sharing and accessibility among astronomy archives cannot be overstated. Since the 1990s, an international partnership between the Space…

Instrumentation and Methods for Astrophysics · Physics 2025-06-16 David R. Rodriguez , Maria Arevalo , Patrick Dowler , Javier Espinosa , Brian McLean , Chris Willott

Raindrops adhering to the lens of UAVs can obstruct visibility of the background scene and degrade image quality. Despite recent progress in image deraining methods and datasets, there is a lack of focus on raindrop removal from UAV aerial…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Wenhui Chang , Hongming Chen , Xin He , Xiang Chen , Liangduo Shen

In the last decade a new generation of telescopes and sensors has allowed the production of a very large amount of data and astronomy has become a data-rich science. New automatic methods largely based on machine learning are needed to cope…

Instrumentation and Methods for Astrophysics · Physics 2014-06-13 Stefano Cavuoti , Massimo Brescia , Giuseppe Longo

This paper introduces a modular, non-deep learning method for filtering and refining sparse correspondences in image matching. Assuming that motion flow within the scene can be approximated by local homography transformations, matches are…

Computer Vision and Pattern Recognition · Computer Science 2025-12-24 Fabio Bellavia , Zhenjun Zhao , Luca Morelli , Fabio Remondino

The images provided by the Advanced Camera for Surveys at the Hubble Space Telescope (ACS/HST) have the amazing spacial resolution of 0".05/pixel. Therefore, it is possible to resolve individual stars in nearby galaxies and, in particular,…

Astrophysics of Galaxies · Physics 2019-03-27 C. Feinstein , G. Baume , J. Rodriguez , M. Vergne

We present an algorithm capable of detecting diffuse, dim sources of any size in an astronomical image. These sources often defeat traditional methods for source finding, which expand regions around points of high intensity. Extended…

Instrumentation and Methods for Astrophysics · Physics 2016-01-05 T. Butler-Yeoman , M. Frean , C. P. Hollitt , D. W. Hogg , M. Johnston-Hollitt

Image editing has made great progress on planar images, but panoramic image editing remains underexplored. Due to their spherical geometry and projection distortions, panoramic images present three key challenges: boundary discontinuity,…

Computer Vision and Pattern Recognition · Computer Science 2025-10-17 Zhiao Feng , Xuewei Li , Junjie Yang , Jingchao Li , Yuxin Peng , Xi Li

Adverse weather conditions often impair the quality of captured images, inevitably inducing cutting-edge object detection models for advanced driver assistance systems (ADAS) and autonomous driving. In this paper, we raise an intriguing…

Computer Vision and Pattern Recognition · Computer Science 2025-04-03 Yihua Fan , Yongzhen Wang , Mingqiang Wei , Fu Lee Wang , Haoran Xie

Recent studies have demonstrated significant progress in aligning text-to-image diffusion models with human preference via Reinforcement Learning from Human Feedback. However, while existing methods achieve high scores on automated reward…

Computer Vision and Pattern Recognition · Computer Science 2026-03-11 Chubin Chen , Sujie Hu , Jiashu Zhu , Meiqi Wu , Jintao Chen , Yanxun Li , Nisha Huang , Chengyu Fang , Jiahong Wu , Xiangxiang Chu , Xiu Li

Image dehazing, addressing atmospheric interference like fog and haze, remains a pervasive challenge crucial for robust vision applications such as surveillance and remote sensing under adverse visibility. While various methodologies have…

Computer Vision and Pattern Recognition · Computer Science 2024-07-02 Donghyun Kim , Seil Kang , Seong Jae Hwang

Mixup is a powerful data augmentation method that interpolates between two or more examples in the input or feature space and between the corresponding target labels. Many recent mixup methods focus on cutting and pasting two or more…

Computer Vision and Pattern Recognition · Computer Science 2022-03-29 Shashanka Venkataramanan , Ewa Kijak , Laurent Amsaleg , Yannis Avrithis

Reducing the atmospheric haze and enhancing image clarity is crucial for computer vision applications. The lack of real-life hazy ground truth images necessitates synthetic datasets, which often lack diverse haze types, impeding effective…

Computer Vision and Pattern Recognition · Computer Science 2024-09-27 Md Tanvir Islam , Nasir Rahim , Saeed Anwar , Muhammad Saqib , Sambit Bakshi , Khan Muhammad