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The maximum entropy method (MEM) is a well known deconvolution technique in radio-interferometry. This method solves a non-linear optimization problem with an entropy regularization term. Other heuristics such as CLEAN are faster but highly…

天体物理仪器与方法 · 物理学 2022-10-27 M. Cárcamo , P. Román , S. Casassus , V. Moral , F. R. Rannou

We introduce DiffFit, a differentiable algorithm for fitting protein atomistic structures into an experimental reconstructed Cryo-Electron Microscopy (cryo-EM) volume map. In structural biology, this process is necessary to…

定量方法 · 定量生物学 2025-01-09 Deng Luo , Zainab Alsuwaykit , Dawar Khan , Ondřej Strnad , Tobias Isenberg , Ivan Viola

We introduce a framework for recovering an image from its rotationally and translationally invariant features based on autocorrelation analysis. This work is an instance of the multi-target detection statistical model, which is mainly used…

图像与视频处理 · 电气工程与系统科学 2022-03-03 Nicholas F. Marshall , Ti-Yen Lan , Tamir Bendory , Amit Singer

Uncalibrated photometric stereo is proposed to estimate the detailed surface normal from images under varying and unknown lightings. Recently, deep learning brings powerful data priors to this underdetermined problem. This paper presents a…

计算机视觉与模式识别 · 计算机科学 2022-08-09 Fangzhou Gao , Meng Wang , Lianghao Zhang , Li Wang , Jiawan Zhang

(abridged) In a series of publications, we describe a comprehensive comparison of Event Horizon Telescope (EHT) data with theoretical models of Sgr A* and M87*. Here, we report on improvements made to our observational data reduction…

天体物理仪器与方法 · 物理学 2025-06-18 M. Janssen , C. -k. Chan , J. Davelaar , I. Natarajan , H. Olivares , B. Ripperda , J. Röder , M. Rynge , M. Wielgus

In this paper, we address the inverse problem of fast, stable, and high-quality wavefront reconstruction from pyramid wavefront sensor data for Adaptive Optics systems on Extremely Large Telescopes. For solving the indicated problem we…

天体物理仪器与方法 · 物理学 2019-05-01 Victoria Hutterer , Ronny Ramlau , Iuliia Shatokhina

We propose PRM, a novel photometric stereo based large reconstruction model to reconstruct high-quality meshes with fine-grained local details. Unlike previous large reconstruction models that prepare images under fixed and simple lighting…

计算机视觉与模式识别 · 计算机科学 2024-12-11 Wenhang Ge , Jiantao Lin , Guibao Shen , Jiawei Feng , Tao Hu , Xinli Xu , Ying-Cong Chen

Zero-shot Referring Image Segmentation (RIS) identifies the instance mask that best aligns with a specified referring expression without training and fine-tuning, significantly reducing the labor-intensive annotation process. Despite…

计算机视觉与模式识别 · 计算机科学 2025-03-04 Yuji Wang , Jingchen Ni , Yong Liu , Chun Yuan , Yansong Tang

Electrical Impedance Tomography (EIT) systems are becoming popular because they present several advantages over competing systems. However, EIT leads to images with very low resolution. Moreover, the nonuniform sampling characteristic of…

计算机视觉与模式识别 · 计算机科学 2019-05-01 Ricardo A. Borsoi , Julio C. C. Aya , Guilherme H. Costa , José C. M. Bermudez

Many imaging modalities involve reconstruction of unknown objects from collections of noisy projections related by random rotations. In one of these modalities, cryogenic electron microscopy (cryo-EM), the extremely low signal-to-noise…

图像与视频处理 · 电气工程与系统科学 2025-10-16 Joakim Andén , Justus Sagemüller

This paper is about a curious phenomenon. Suppose we have a data matrix, which is the superposition of a low-rank component and a sparse component. Can we recover each component individually? We prove that under some suitable assumptions,…

信息论 · 计算机科学 2009-12-21 Emmanuel J. Candes , Xiaodong Li , Yi Ma , John Wright

Cryo-Electron Microscopy (cryo-EM) has emerged as a key technology to determine the structure of proteins, particularly large protein complexes and assemblies in recent years. A key challenge in cryo-EM data analysis is to automatically…

生物大分子 · 定量生物学 2023-04-04 Nabin Giri , Raj S. Roy , Jianlin Cheng

Multispectral unmixing (MU) is critical due to the inevitable mixed pixel phenomenon caused by the limited spatial resolution of typical multispectral images in remote sensing. However, MU mathematically corresponds to the underdetermined…

图像与视频处理 · 电气工程与系统科学 2025-02-04 Chia-Hsiang Lin , Jhao-Ting Lin

Fourier ptychographic microscopy (FPM) is a pivotal computational imaging technique that achieves phase and amplitude reconstruction with high resolution and wide field of view, using low numerical aperture objectives and LED array…

Structured illumination microscopy (SIM) improves resolution by down-modulating high-frequency information of an object to fit within the passband of the optical system. Generally, the reconstruction process requires prior knowledge of the…

计算机视觉与模式识别 · 计算机科学 2017-01-13 Li-Hao Yeh , Lei Tian , Laura Waller

Atmospheric tomography, i.e. the reconstruction of the turbulence profile in the atmosphere, is a challenging task for adaptive optics (AO) systems of the next generation of extremely large telescopes. Within the community of AO the first…

天体物理仪器与方法 · 物理学 2020-11-16 Ronny Ramlau , Bernadett Stadler

The $n=1$ photon ring is an important probe of black hole (BH) properties and will be resolved by the Black Hole Explorer (BHEX) for the first time. However, extraction of black hole parameters from observations of the $n=1$ subring is not…

高能天体物理现象 · 物理学 2024-11-05 Joseph R. Farah , Jordy Davelaar , Daniel Palumbo , Michael D. Johnson , Jonathan Delgado

Monocular 4D human-object interaction (HOI) reconstruction - recovering a moving human and a manipulated object from a single RGB video - remains challenging due to depth ambiguity and frequent occlusions. Existing methods often rely on…

计算机视觉与模式识别 · 计算机科学 2026-03-17 Haoyu Zhang , Wei Zhai , Yuhang Yang , Yang Cao , Zheng-Jun Zha

Event cameras are novel vision sensors that sample, in an asynchronous fashion, brightness increments with low latency and high temporal resolution. The resulting streams of events are of high value by themselves, especially for high speed…

计算机视觉与模式识别 · 计算机科学 2021-04-13 F. Paredes-Vallés , G. C. H. E. de Croon

Learned progressive image compression is gaining momentum as it allows improved image reconstruction as more bits are decoded at the receiver. We propose a progressive image compression method in which an image is first represented as a…

计算机视觉与模式识别 · 计算机科学 2025-01-13 Alberto Presta , Enzo Tartaglione , Attilio Fiandrotti , Marco Grangetto , Pamela Cosman