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3D reconstruction from 2D images is a central problem in computer vision. Recent works have been focusing on reconstruction directly from a single image. It is well known however that only one image cannot provide enough information for…

计算机视觉与模式识别 · 计算机科学 2019-01-25 Jhony K. Pontes , Chen Kong , Anders Eriksson , Clinton Fookes , Sridha Sridharan , Simon Lucey

A detailed analysis of ptychography for 3D phase reconstructions of thick specimens is performed. We introduce multi-focus ptychography, which incorporates a 4D-STEM defocus series to enhance the quality of 3D reconstructions along the beam…

3D reconstruction of dynamic scenes is a long-standing problem in computer graphics and increasingly difficult the less information is available. Shape-from-Template (SfT) methods aim to reconstruct a template-based geometry from RGB images…

计算机视觉与模式识别 · 计算机科学 2024-04-16 David Stotko , Nils Wandel , Reinhard Klein

Fluorescence microscopy (FM) imaging is a fundamental technique for observing live cell division, one of the most essential processes in the cycle of life and death. Observing 3D live cells requires scanning through the cell volume while…

图像与视频处理 · 电气工程与系统科学 2026-01-28 Chenwei Wang , Zhaoke Huang , Zelin Li , Wenqi Zhu

Magnetic Particle Imaging (MPI) is a promising noninvasive in vivo imaging modality that makes it possible to map the spatial distribution of superparamagnetic nanoparticles by exposing them to dynamic magnetic fields. In the Field-Free…

数值分析 · 数学 2025-08-08 Vladyslav Gapyak , Thomas März , Andreas Weinmann

Direct automatic segmentation of objects from 3D medical imaging, such as magnetic resonance (MR) imaging, is challenging as it often involves accurately identifying a number of individual objects with complex geometries within a large…

图像与视频处理 · 电气工程与系统科学 2021-09-23 Wei Dai , Boyeong Woo , Siyu Liu , Matthew Marques , Craig B. Engstrom , Peter B. Greer , Stuart Crozier , Jason A. Dowling , Shekhar S. Chandra

This paper concerns the use of sequential Monte Carlo methods (SMC) for smoothing in general state space models. A well-known problem when applying the standard SMC technique in the smoothing mode is that the resampling mechanism introduces…

统计理论 · 数学 2008-03-06 Jimmy Olsson , Olivier Cappé , Randal Douc , Eric Moulines

To recover the three dimensional (3D) volumetric distribution of matter in an object, images of the object are captured from multiple directions and locations. Using these images tomographic computations extract the distribution. In highly…

计算机视觉与模式识别 · 计算机科学 2015-12-08 Vadim Holodovsky , Yoav Y. Schechner , Anat Levin , Aviad Levis , Amit Aides

Active 3D measurement, especially structured light (SL) has been widely used in various fields for its robustness against textureless or equivalent surfaces by low light illumination. In addition, reconstruction of large scenes by moving…

计算机视觉与模式识别 · 计算机科学 2024-10-22 Kazuto Ichimaru , Diego Thomas , Takafumi Iwaguchi , Hiroshi Kawasaki

Infrared thermography has been widely used in several domains to capture and measure temperature distributions across surfaces and objects. This methodology can be further expanded to 3D applications if the spatial distribution of the…

计算机视觉与模式识别 · 计算机科学 2024-01-17 Jincheng Zhang , Kevin Brink , Andrew R Willis

Automatic reconstruction of 3D models from images using multi-view Structure-from-Motion methods has been one of the most fruitful outcomes of computer vision. These advances combined with the growing popularity of Micro Aerial Vehicles as…

机器人学 · 计算机科学 2016-11-15 Shreyansh Daftry , Christof Hoppe , Horst Bischof

Image restoration is a challenging ill-posed problem which estimates latent sharp image from its degraded counterpart. Although the existing methods have achieved promising performance by designing novelty architecture of module, they…

计算机视觉与模式识别 · 计算机科学 2024-05-21 Hu Gao , Bowen Ma , Ying Zhang , Jingfan Yang , Jing Yang , Depeng Dang

Computed tomography (CT) reconstructs volumetric images using X-ray projection data acquired from multiple angles around an object. For low-dose or sparse-view CT scans, the classic image reconstruction algorithms often produce severe noise…

医学物理 · 物理学 2024-03-04 Wenxiang Cong , Wenjun Xia , Ge Wang

We present a new color photometric stereo (CPS) method that recovers high quality, detailed 3D face geometry in a single shot. Our system uses three uncalibrated near point lights of different colors and a single camera. For robust…

计算机视觉与模式识别 · 计算机科学 2019-12-24 Zhang Chen , Yu Ji , Mingyuan Zhou , Sing Bing Kang , Jingyi Yu

The auxiliary-field quantum Monte Carlo (AFQMC) method provides a computational framework for solving the time-independent Schroedinger equation in atoms, molecules, solids, and a variety of model systems. AFQMC has recently witnessed…

计算物理 · 物理学 2018-08-14 Mario Motta , Shiwei Zhang

Recently, experiments have been reported where researchers were able to perform high dynamic range (HDR) tomography in a heuristic fashion, by fusing multiple tomographic projections. This approach to HDR tomography has been inspired by HDR…

信息论 · 计算机科学 2021-05-11 Matthias Beckmann , Ayush Bhandari , Felix Krahmer

The Fast Proximal Gradient Method (FPGM) and the Monotone FPGM (MFPGM) for minimization of nonsmooth convex functions are introduced and applied to tomographic image reconstruction. Convergence properties of the sequence of objective…

最优化与控制 · 数学 2020-08-25 Elias S. Helou , Marcelo V. W. Zibetti , Gabor T. Herman

Particle-based ensemble semi-classical Monte Carlo (MC) methods employ quantum corrections (QCs) to address quantum confinement and degenerate carrier populations to model tomorrow's ultra-scaled MOSFETs. Here we present new approaches to…

介观与纳米尺度物理 · 物理学 2016-04-04 Dax M. Crum , Amithraj Valsaraj , John K. David , Leonard F. Register , Sanjay K. Banerjee

Biological tissues are complex structures composed of many elements which make light-based tissue diagnostics challenging. Over the past decades, Monte Carlo technique has been used as a fundamental and versatile approach toward modeling…

光学 · 物理学 2024-05-17 Maryam Ghahremani

Medical image reconstruction with pre-trained score-based generative models (SGMs) has advantages over other existing state-of-the-art deep-learned reconstruction methods, including improved resilience to different scanner setups and…