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Tomography is a central tool in medical applications, allowing doctors to investigate patients' interior features. The Radon transform (in two dimensions) is commonly used to model the measurement process in parallel-beam CT. Suitable…

数值分析 · 数学 2026-02-27 Richard Huber

Deformable image registration is a standard engineering problem used to determine the distortion experienced by a body by comparing two images of it in different states. This study introduces two new DIR methods designed to capture…

计算机视觉与模式识别 · 计算机科学 2024-09-04 Daniel E. Hurtado , Axel Osses , Rodrigo Quezada

Image registration is the inference of transformations relating noisy and distorted images. It is fundamental in computer vision, experimental physics, and medical imaging. Many algorithms and analyses exist for inferring shift, rotation,…

数据分析、统计与概率 · 物理学 2019-02-21 Colin B. Clement , Matthew Bierbaum , James P. Sethna

Object recognition is still an impediment in the field of computer vision and multimedia retrieval.Defining an object model is a critical task. Shape information of an object play a critical role in the process of object recognition.…

计算机视觉与模式识别 · 计算机科学 2014-03-31 Akbar Khan , Pratap Reddy L

This paper proposes rollable latent space (RLS) for an azimuth invariant synthetic aperture radar (SAR) target recognition. Scarce labeled data and limited viewing direction are critical issues in SAR target recognition.The RLS is a…

计算机视觉与模式识别 · 计算机科学 2018-04-23 Kazutoshi Sagi , Takahiro Toizumi , Yuzo Senda

Objects with complex structures pose significant challenges to existing instance segmentation methods that rely on boundary or affinity maps, which are vulnerable to small errors around contacting pixels that cause noticeable connectivity…

计算机视觉与模式识别 · 计算机科学 2023-10-10 Zudi Lin , Donglai Wei , Aarush Gupta , Xingyu Liu , Deqing Sun , Hanspeter Pfister

We demonstrate that, under orthographic projection and with a camera fixated on a point located on a rigid body, the rotation of that body can be analytically obtained by tracking only one other feature in the image. With some exceptions,…

计算机视觉与模式识别 · 计算机科学 2025-07-08 Daniel Raviv , Juan D. Yepes , Eiki M. Martinson

The saturation effects, which originally refer to the fact that kernel ridge regression (KRR) fails to achieve the information-theoretical lower bound when the regression function is over-smooth, have been observed for almost 20 years and…

机器学习 · 统计学 2025-03-04 Weihao Lu , Haobo Zhang , Yicheng Li , Qian Lin

Recent developments in elastic shape analysis (ESA) are motivated by the fact that it provides comprehensive frameworks for simultaneous registration, deformation, and comparison of shapes. These methods achieve computational efficiency…

图形学 · 计算机科学 2019-06-18 Hamid Laga , Qian Xie , Ian H. Jermyn , Anuj Srivastava

Here we present new $L^2$ injectivity results for 2-D and 3-D Compton scattering tomography (CST) problems in translational geometries. The results are proven through the explicit inversion of a new toric section and apple Radon transform,…

泛函分析 · 数学 2020-02-19 James Webber , Eric Miller

Recent deep learning models increasingly rely on depth without structural guarantees on the validity of intermediate representations, rendering early stopping and adaptive computation ill-posed. We address this limitation by formulating a…

机器学习 · 计算机科学 2026-01-28 Geunhyeok Yu , Hyoseok Hwang

Due to the trade-off between the temporal and spatial resolution of thermal spaceborne sensors, super-resolution methods have been developed to provide fine-scale Land SurfaceTemperature (LST) maps. Most of them are trained at low…

Hyperspectral image super-resolution has attained widespread prominence to enhance the spatial resolution of hyperspectral images. However, convolution-based methods have encountered challenges in harnessing the global spatial-spectral…

图像与视频处理 · 电气工程与系统科学 2023-11-30 Shi Chen , Lefei Zhang , Liangpei Zhang

Radio Tomographic Imaging (RTI) is a phaseless imaging approach that can provide shape reconstruction and localization of objects using received signal strength (RSS) measurements. RSS measurements can be straightforwardly obtained from…

应用物理 · 物理学 2023-11-17 Amartansh Dubey , Zan Li , Ross Murch

Compton scatter tomography is an emerging technique with attractive applications in several fields in imaging such as non-destructive testing and medical scanning. In this paper, we introduce a novel modality in three dimensions with a…

数值分析 · 数学 2022-03-18 Javier Cebeiro , Cecilia Tarpau , Marcela Morvidone , Diana Rubio , Mai Nguyen

This paper investigates the super-resolution (SR) of velocity fields in two-dimensional fluids from the viewpoint of rotational equivariance. SR refers to techniques that estimate high-resolution images from those in low resolution and has…

流体动力学 · 物理学 2022-10-26 Yuki Yasuda , Ryo Onishi

The penetration power of x-rays allows one to image large objects. For example, centimeter-sized specimens can be imaged with micron-level resolution using synchrotron sources. In this case, however, the limited beam diameter and detector…

图像与视频处理 · 电气工程与系统科学 2020-12-23 Ming Du , Rafael Vescovi , Kamel Fezzaa , Chris Jacobsen , Doga Gursoy

In this paper, we present a spatial rectifier to estimate surface normals of tilted images. Tilted images are of particular interest as more visual data are captured by arbitrarily oriented sensors such as body-/robot-mounted cameras.…

计算机视觉与模式识别 · 计算机科学 2022-07-15 Tien Do , Khiem Vuong , Stergios I. Roumeliotis , Hyun Soo Park

Symmetry is an important composition feature by investigating similar sides inside an image plane. It has a crucial effect to recognize man-made or nature objects within the universe. Recent symmetry detection approaches used a smoothing…

计算机视觉与模式识别 · 计算机科学 2017-04-24 Mohamed Elawady , Olivier Alata , Christophe Ducottet , Cecile Barat , Philippe Colantoni

The axiomatic bases of Special Relativity Theory (SRT) are thoroughly re-examined from an operational point of view, with particular emphasis on the status of Einstein synchronization in the light of the possibility of arbitrary…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Guido Rizzi , Matteo Luca Ruggiero , Alessio Serafini