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We describe a maximum likelihood regularized beam deconvolution map-making algorithm for data from high resolution, polarization sensitive instruments, such as the Planck data set. The resulting algorithm, which we call PReBeaM, is…

Astrophysics · Physics 2009-11-13 Charmaine Armitage-Caplan , Benjamin D. Wandelt

Guided image filter is a well-known local filter in image processing. However, the presence of halo artifacts is a common issue associated with this type of filter. This paper proposes an algorithm that utilizes gradient information to…

Computer Vision and Pattern Recognition · Computer Science 2023-07-11 Bo Wang , Yihong Wang , Xiubao Sui , Yuan Liu , Qian Chen

This paper is concerned with polarimetric dense map reconstruction based on a polarization camera with the help of relative depth information as a prior. In general, polarization imaging is able to reveal information about surface normal…

Computer Vision and Pattern Recognition · Computer Science 2021-02-11 Moein Shakeri , Shing Yan Loo , Hong Zhang

Speckle suppression in synthetic aperture radar (SAR) images is a key processing step which continues to be a research topic. A wide variety of methods, using either spatially-based approaches or transform-based strategies, have been…

Computer Vision and Pattern Recognition · Computer Science 2024-08-30 Alejandro Mestre-Quereda , Juan M. Lopez-Sanchez

Fundus images are very useful in identifying various ophthalmic disorders. However, due to the presence of artifacts, the visibility of the retina is severely affected. This may result in misdiagnosis of the disorder which may lead to more…

Image and Video Processing · Electrical Eng. & Systems 2021-12-28 Sai Koushik S S , K. G. Srinivasa

Nowadays, three-dimensional reconstruction is used in various fields like computer vision, computer graphics, mixed reality and digital twin. The three-dimensional reconstruction of cultural heritage objects is one of the most important…

Computer Vision and Pattern Recognition · Computer Science 2024-06-24 F. S. Mortazavi , M. Saadatseresht

Reconstructing an object's geometry and appearance from multiple images, also known as inverse rendering, is a fundamental problem in computer graphics and vision. Inverse rendering is inherently ill-posed because the captured image is an…

Computer Vision and Pattern Recognition · Computer Science 2022-03-28 Akshat Dave , Yongyi Zhao , Ashok Veeraraghavan

Cross-depiction is the problem of identifying the same object even when it is depicted in a variety of manners. This is a common problem in handwritten historical documents image analysis, for instance when the same letter or motif is…

Computer Vision and Pattern Recognition · Computer Science 2018-12-10 Vinaychandran Pondenkandath , Michele Alberti , Nicole Eichenberger , Rolf Ingold , Marcus Liwicki

Retrospective artifact correction (RAC) improves image quality post acquisition and enhances image usability. Recent machine learning driven techniques for RAC are predominantly based on supervised learning and therefore practical utility…

Image and Video Processing · Electrical Eng. & Systems 2021-10-12 Siyuan Liu , Kim-Han Thung , Liangqiong Qu , Weili Lin , Dinggang Shen , Pew-Thian Yap

Polarization information of the light can provide rich cues for computer vision and scene understanding tasks, such as the type of material, pose, and shape of the objects. With the advent of new and cheap polarimetric sensors, this imaging…

Computer Vision and Pattern Recognition · Computer Science 2024-01-03 Joaquin Rodriguez , Lew-Fock-Chong Lew-Yan-Voon , Renato Martins , Olivier Morel

Recent advancements in deep generative models have facilitated the creation of photo-realistic images across various tasks. However, these generated images often exhibit perceptual artifacts in specific regions, necessitating manual…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Lingzhi Zhang , Zhengjie Xu , Connelly Barnes , Yuqian Zhou , Qing Liu , He Zhang , Sohrab Amirghodsi , Zhe Lin , Eli Shechtman , Jianbo Shi

Plastic waste in aquatic environments poses severe risks to marine life and human health. Autonomous robots can be utilized to collect floating waste, but they require accurate object identification capability. While deep learning has been…

Computer Vision and Pattern Recognition · Computer Science 2024-09-20 Luis Felipe Wolf Batista , Salim Khazem , Mehran Adibi , Seth Hutchinson , Cedric Pradalier

Fake News and especially deepfakes (generated, non-real image or video content) have become a serious topic over the last years. With the emergence of machine learning algorithms it is now easier than ever before to generate such fake…

Computer Vision and Pattern Recognition · Computer Science 2025-03-17 Lukas Kroiß , Johannes Reschke

This paper makes a first attempt to bring the Shape from Polarization (SfP) problem to the realm of deep learning. The previous state-of-the-art methods for SfP have been purely physics-based. We see value in these principled models, and…

Computer Vision and Pattern Recognition · Computer Science 2020-05-26 Yunhao Ba , Alex Ross Gilbert , Franklin Wang , Jinfa Yang , Rui Chen , Yiqin Wang , Lei Yan , Boxin Shi , Achuta Kadambi

Searches for low-surface-brightness galaxies (LSBGs) in galaxy surveys are plagued by the presence of a large number of artifacts (e.g., objects blended in the diffuse light from stars and galaxies, Galactic cirrus, star-forming regions in…

Astrophysics of Galaxies · Physics 2020-11-26 Dimitrios Tanoglidis , Aleksandra Ćiprijanović , Alex Drlica-Wagner

A deep neural networks based method is proposed to convert single polarization grayscale SAR image to fully polarimetric. It consists of two components: a feature extractor network to extract hierarchical multi-scale spatial features of…

Computer Vision and Pattern Recognition · Computer Science 2017-07-25 Qian Song , Feng Xu , Ya-Qiu Jin

Searches for counterparts to multimessenger events with optical imagers use difference imaging to detect new transient sources. However, even with existing artifact detection algorithms, this process simultaneously returns several classes…

Polarimetric imaging enables advanced vision applications such as normal estimation and de-reflection by capturing unique surface-material interactions. However, existing applications (alternatively called downstream tasks) rely on datasets…

Computer Vision and Pattern Recognition · Computer Science 2026-03-25 Yidong Luo , Chenggong Li , Yunfeng Song , Ping Wang , Boxin Shi , Junchao Zhang , Xin Yuan

Deep learning algorithms offer a powerful means to automatically analyze the content of medical images. However, many biological samples of interest are primarily transparent to visible light and contain features that are difficult to…

Computer Vision and Pattern Recognition · Computer Science 2017-09-22 Roarke Horstmeyer , Richard Y. Chen , Barbara Kappes , Benjamin Judkewitz

Image inpainting is an essential task for multiple practical applications like object removal and image editing. Deep GAN-based models greatly improve the inpainting performance in structures and textures within the hole, but might also…

Computer Vision and Pattern Recognition · Computer Science 2022-08-09 Lingzhi Zhang , Yuqian Zhou , Connelly Barnes , Sohrab Amirghodsi , Zhe Lin , Eli Shechtman , Jianbo Shi