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High spatial frequency information, including fine details like textures, significantly contributes to the accuracy of semantic segmentation. However, according to the Nyquist-Shannon Sampling Theorem, high-frequency components are…

计算机视觉与模式识别 · 计算机科学 2025-07-24 Linwei Chen , Ying Fu , Lin Gu , Dezhi Zheng , Jifeng Dai

We introduce Neural Flow Maps, a novel simulation method bridging the emerging paradigm of implicit neural representations with fluid simulation based on the theory of flow maps, to achieve state-of-the-art simulation of inviscid fluid…

图形学 · 计算机科学 2023-12-25 Yitong Deng , Hong-Xing Yu , Diyang Zhang , Jiajun Wu , Bo Zhu

Purpose: Spectral imaging is a method in medical x-ray imaging to extract information about the object constituents by the material-specific energy dependence of x-ray attenuation. The authors have investigated a photon-counting spectral…

Simulations using the Smoothed Particle Hydrodynamics (SPH) technique typically include numerical viscosity to model shocks and maintain particle order on the kernel scale. This numerical viscosity is composed of linear and quadratic terms,…

太阳与恒星天体物理 · 物理学 2025-06-02 Cheng Chen , C. J. Nixon

Scientific imaging problems are often severely ill-posed, and hence have significant intrinsic uncertainty. Accurately quantifying the uncertainty in the solutions to such problems is therefore critical for the rigorous interpretation of…

图像与视频处理 · 电气工程与系统科学 2024-10-22 Julian Tachella , Marcelo Pereyra

Meshless methods are often used in numerical simulations of systems of partial differential equations (PDEs), particularly those which involve complex geometries or free surfaces. Here we present a novel compact scheme based on the local…

数值分析 · 数学 2026-03-13 Henry M. Broadley , Steven J. Lind , Jack R. C. King

Breast lesion localization using tactile imaging is a new and developing direction in medical science. To achieve the goal, proper image reconstruction and image registration can be a valuable asset. In this paper, a new approach of the…

计算机视觉与模式识别 · 计算机科学 2019-10-16 Shuvendu Rana , Rory Hampson , Gordon Dobie

We propose a novel 3D shape correspondence method based on the iterative alignment of so-called smooth shells. Smooth shells define a series of coarse-to-fine shape approximations designed to work well with multiscale algorithms. The main…

计算机视觉与模式识别 · 计算机科学 2019-12-03 Marvin Eisenberger , Zorah Lähner , Daniel Cremers

The real and imaginary scattering phase shifts (SPS) and potentials for $\ell=0,2,4$ partial waves have been obtained by developing a novel algorithm$^{\ref{Fig1}}$ to derive inverse potentials using a phenomenological approach. The phase…

核理论 · 物理学 2024-12-20 Shikha Awasthi , Ishwar Kant , Anil Khachi , O. S. K. S. Sastri

Nonsinusoidal oscillatory signals are everywhere. In practice, the nonsinusoidal oscillatory pattern, modeled as a 1-periodic wave-shape function (WSF), might vary from cycle to cycle. When there are finite different WSFs, $s_1,\ldots,s_K$,…

信号处理 · 电气工程与系统科学 2023-04-12 Marcelo A. Colominas , Hau-Tieng Wu

Numerical heating in particle-in-cell (PIC) codes currently precludes the accurate simulation of cold, relativistic plasma over long periods, severely limiting their applications in astrophysical environments. We present a spatially…

Deploying Vision-Language Models (VLMs) on edge devices (e.g., smartphones and robots) is crucial for enabling low-latency and privacy-preserving intelligent applications. Given the resource constraints of these devices, quantization offers…

计算机视觉与模式识别 · 计算机科学 2025-11-13 Tianyu Guo , Shanwei Zhao , Shiai Zhu , Chenguang Ma

In Data Assimilation, observations are fused with simulations to obtain an accurate estimate of the state and parameters for a given physical system. Combining data with a model, however, while accurately estimating uncertainty, is…

计算工程、金融与科学 · 计算机科学 2024-06-05 Nikolaj T. Mücke , Sander M. Bohté , Cornelis W. Oosterlee

Sparse-view computed tomography (CT) is a practical solution to reduce radiation dose, but the resulting ill-posed inverse problem poses significant challenges for accurate image reconstruction. Although deep learning and diffusion-based…

图像与视频处理 · 电气工程与系统科学 2025-06-10 Changsheng Fang , Yongtong Liu , Bahareh Morovati , Shuo Han , Yu Shi , Li Zhou , Shuyi Fan , Hengyong Yu

Fourier ptychography (FP) is a recently proposed computational imaging technique for high space-bandwidth product imaging. In real setups such as endoscope and transmission electron microscope, the common sample motion largely degrades the…

光学 · 物理学 2016-10-14 Liheng Bian , Guoan Zheng , Kaikai Guo , Jinli Suo , Changhuei Yang , Feng Chen , Qionghai Dai

Iterative proportional fitting (IPF) is a widely used method for spatial microsimulation. The technique results in non-integer weights for individual rows of data. This is problematic for certain applications and has led many researchers to…

统计方法学 · 统计学 2013-03-22 Robin Lovelace , Dimitris Ballas

The spiking neural networks (SNNs) that efficiently encode temporal sequences have shown great potential in extracting audio-visual joint feature representations. However, coupling SNNs (binary spike sequences) with transformers…

多媒体 · 计算机科学 2024-07-12 Wenrui Li , Penghong Wang , Ruiqin Xiong , Xiaopeng Fan

In this paper, we introduce a novel approach that combines multiresolution (MR) techniques with the flux reconstruction (FR) method to accurately and effciently simulate compressible flows. We achieve further enhancements in effciency…

流体动力学 · 物理学 2023-06-21 Yixuan Lian , Jinsheng Cai , Shucheng Pan

The analysis of the time-frequency content of a signal is a classical problem in signal processing, with a broad number of applications in real life. Many different approaches have been developed over the decades, which provide alternative…

数值分析 · 数学 2022-06-02 Antonio Cicone , Wing Suet Li , Haomin Zhou

Tracking the migration of superparamagnetic iron oxide (SPIO) labeled immune cells in vivo is valuable for understanding the immunogenic response to cancer and therapies. Quantitative cell tracking using compressed sensing TurboSPI-based…

医学物理 · 物理学 2019-03-05 Zoe O'Brien-Moran , Chris V. Bowen , James A. Rioux , Kimberly D. Brewer
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