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Graph Laplacians and related nonlinear mappings into low dimensional spaces have been shown to be powerful tools for organizing high dimensional data. Here we consider a data set X in which the graph associated with it changes depending on…

经典分析与常微分方程 · 数学 2015-03-20 Ronald R. Coifman , Matthew J. Hirn

The density-equalizing map, a technique developed for cartogram creation, has been widely applied to data visualization but only for 2D applications. In this work, we propose a novel method called the volumetric density-equalizing reference…

数值分析 · 数学 2021-04-06 Gary P. T. Choi , Chris H. Rycroft

Diffusions are a successful technique to sample from high-dimensional distributions. The target distribution can be either explicitly given or learnt from a collection of samples. They implement a diffusion process whose endpoint is a…

机器学习 · 计算机科学 2025-09-03 Andrea Montanari

Many generative models attempt to replicate the density of their input data. However, this approach is often undesirable, since data density is highly affected by sampling biases, noise, and artifacts. We propose a method called SUGAR…

机器学习 · 计算机科学 2018-09-10 Ofir Lindenbaum , Jay S. Stanley , Guy Wolf , Smita Krishnaswamy

Anatomical atlases are widely used for population studies and analysis. Conditional atlases target a specific sub-population defined via certain conditions, such as demographics or pathologies, and allow for the investigation of…

图像与视频处理 · 电气工程与系统科学 2025-06-25 Sophie Starck , Vasiliki Sideri-Lampretsa , Bernhard Kainz , Martin J. Menten , Tamara T. Mueller , Daniel Rueckert

Efficiently analyzing maps from upcoming large-scale surveys requires gaining direct access to a high-dimensional likelihood and generating large-scale fields with high fidelity, which both represent major challenges. Using CAMELS…

宇宙学与河外天体物理 · 物理学 2023-11-03 Sultan Hassan , Sambatra Andrianomena

Spatial scientometrics has attracted a lot of attention in the very recent past. The visualization methods (density maps) presented in this paper allow for an analysis revealing regions of excellence around the world using computer programs…

数字图书馆 · 计算机科学 2011-04-13 Lutz Bornmann , Ludo Waltman

Diffusion methods have been proven to be very effective to generate images while conditioning on a text prompt. However, and although the quality of the generated images is unprecedented, these methods seem to struggle when trying to…

计算机视觉与模式识别 · 计算机科学 2023-02-07 Álvaro Barbero Jiménez

Diffusion Probabilistic Methods are employed for state-of-the-art image generation. In this work, we present a method for extending such models for performing image segmentation. The method learns end-to-end, without relying on a…

计算机视觉与模式识别 · 计算机科学 2022-09-08 Tomer Amit , Tal Shaharbany , Eliya Nachmani , Lior Wolf

Constructing reduced representations of high-dimensional systems is a fundamental problem in physical chemistry. Many unsupervised machine learning methods can automatically find such low-dimensional representations. However, an often…

化学物理 · 物理学 2024-04-04 Jakub Rydzewski

In this paper, we address the limitations of existing text-to-image diffusion models in generating demographically fair results when given human-related descriptions. These models often struggle to disentangle the target language context…

计算机视觉与模式识别 · 计算机科学 2024-03-07 Jia Li , Lijie Hu , Jingfeng Zhang , Tianhang Zheng , Hua Zhang , Di Wang

Diffusion maps approximate the generator of Langevin dynamics from simulation data. They afford a means of identifying the slowly-evolving principal modes of high-dimensional molecular systems. When combined with a biasing mechanism,…

数据分析、统计与概率 · 物理学 2020-07-01 Zofia Trstanova , Ben Leimkuhler , Tony Lelièvre

We propose a new, efficient multi-scale method to decompose a map (or signal in general) into components maps that contain structures of different sizes. In the widely-used wave transform, artifacts containing negative values arise around…

天体物理仪器与方法 · 物理学 2022-04-11 Guang-Xing Li

Diffusion maps are a commonly used kernel-based method for manifold learning, which can reveal intrinsic structures in data and embed them in low dimensions. However, as with most kernel methods, its implementation requires a heavy…

机器学习 · 计算机科学 2019-12-03 Scott Gigante , Jay S. Stanley , Ngan Vu , David van Dijk , Kevin Moon , Guy Wolf , Smita Krishnaswamy

Density-equalizing map is a shape deformation technique originally developed for cartogram creation and sociological data visualization on planar geographical maps. In recent years, there has been an increasing interest in developing…

图形学 · 计算机科学 2025-11-18 Shunyu Yao , Gary P. T. Choi

We develop a diffusion-based approach for various document layout sequence generation. Layout sequences specify the contents of a document design in an explicit format. Our novel diffusion-based approach works in the sequence domain rather…

计算机视觉与模式识别 · 计算机科学 2023-09-19 Liu He , Yijuan Lu , John Corring , Dinei Florencio , Cha Zhang

Information visualization is essential in making sense out of large data sets. Often, high-dimensional data are visualized as a collection of points in 2-dimensional space through dimensionality reduction techniques. However, these…

计算几何 · 计算机科学 2009-07-16 Emden R. Gansner , Yifan Hu , Stephen G. Kobourov

We introduce diffusion geometry as a new framework for geometric and topological data analysis. Diffusion geometry uses the Bakry-Emery $\Gamma$-calculus of Markov diffusion operators to define objects from Riemannian geometry on a wide…

度量几何 · 数学 2024-07-03 Iolo Jones

Much effort has been put into developing samplers with specific properties, such as producing blue noise, low-discrepancy, lattice or Poisson disk samples. These samplers can be slow if they rely on optimization processes, may rely on a…

Density-equalizing map (DEM) serves as a powerful technique for creating shape deformations with the area changes reflecting an underlying density function. In recent decades, DEM has found widespread applications in fields such as data…

图形学 · 计算机科学 2025-11-18 Yanwen Huang , Lok Ming Lui , Gary P. T. Choi