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In the present paper, we study algorithmic questions for the arc-intersection graph of directed paths on a tree. Such graphs are known to be perfect (proved by Monma and Wei in 1986). We present faster algorithms than all previously known…

Discrete Mathematics · Computer Science 2009-02-10 Olivier Durand de Gévigney , Frédéric Meunier , Christian Popa , Julien Reygner , Ayrin Romero

The aortic vessel tree is composed of the aorta and its branching arteries, and plays a key role in supplying the whole body with blood. Aortic diseases, like aneurysms or dissections, can lead to an aortic rupture, whose treatment with…

Image and Video Processing · Electrical Eng. & Systems 2023-04-04 Yuan Jin , Antonio Pepe , Jianning Li , Christina Gsaxner , Fen-hua Zhao , Kelsey L. Pomykala , Jens Kleesiek , Alejandro F. Frangi , Jan Egger

Aircraft maintenance, repair and overhaul industry is gradually switching to 3D scanning for dent inspection. High-accuracy devices allow quick and repeatable measurements, which translate into efficient reporting and more objective damage…

Computer Vision and Pattern Recognition · Computer Science 2023-07-13 Pasquale Lafiosca , Ip-Shing Fan , Nicolas P. Avdelidis

Unlike on images, semantic learning on 3D point clouds using a deep network is challenging due to the naturally unordered data structure. Among existing works, PointNet has achieved promising results by directly learning on point sets.…

Computer Vision and Pattern Recognition · Computer Science 2018-04-05 Yiru Shen , Chen Feng , Yaoqing Yang , Dong Tian

Pulmonary diseases impact millions of lives globally and annually. The recent outbreak of the pandemic of the COVID-19, a novel pulmonary infection, has more than ever brought the attention of the research community to the machine-aided…

Machine Learning · Computer Science 2020-11-30 Morteza Hosseini , Haoran Ren , Hasib-Al Rashid , Arnab Neelim Mazumder , Bharat Prakash , Tinoosh Mohsenin

We tackle the challenging problem of creating full and accurate three dimensional reconstructions of botanical trees with the topological and geometric accuracy required for subsequent physical simulation, e.g. in response to wind forces.…

Computer Vision and Pattern Recognition · Computer Science 2018-12-24 Ed Quigley , Winnie Lin , Yilin Zhu , Ronald Fedkiw

This research aims to detect the physical characteristics of corn kernels and analyze images using a deep learning model. The data analysis based on the CRISP-DM framework which consists of six steps, business understanding, data…

Computational Engineering, Finance, and Science · Computer Science 2024-05-31 Suwannee Adsavakulchai , Mawin Prommasaeng

In topological data analysis, persistent homology characterizes robust topological features in data and it has a summary representation, called a persistence diagram. Statistical research for persistence diagrams have been actively…

Algebraic Topology · Mathematics 2018-10-29 Genki Kusano

Based on solid theoretical foundations, we present strong evidences that a number of real-life networks, taken from different domains like Internet measurements, biological data, web graphs, social and collaboration networks, exhibit…

Social and Information Networks · Computer Science 2014-02-24 Muad Abu-Ata , Feodor F. Dragan

Automatic detection and classification of Cardiovascular disease (CVD) from Computed Tomography (CT) images play an important part in facilitating better-informed clinical decisions. However, most of the recent deep learning based methods…

Image and Video Processing · Electrical Eng. & Systems 2026-05-07 Ajay Mittal , Raghav Mehta , Omar Todd , Philipp Seeböck , Georg Langs , Ben Glocker

We introduce a family of positive definite kernels specifically optimized for the manipulation of 3D structures of molecules with kernel methods. The kernels are based on the comparison of the three-points pharmacophores present in the 3D…

Quantitative Methods · Quantitative Biology 2016-08-16 Pierre Mahé , Liva Ralaivola , Véronique Stoven , Jean-Philippe Vert

Summary: Medical researchers obtain knowledge about the prevention and treatment of disability and disease using physical measurements and image data. To assist in this endeavor, feature extraction packages are available that are designed…

Computer Vision and Pattern Recognition · Computer Science 2024-05-27 Janan Arslan , Henri Chhoa , Ines Khemir , Romain Valabregue , Kurt K. Benke

We propose DualConvMesh-Nets (DCM-Net) a family of deep hierarchical convolutional networks over 3D geometric data that combines two types of convolutions. The first type, geodesic convolutions, defines the kernel weights over mesh surfaces…

Computer Vision and Pattern Recognition · Computer Science 2020-04-03 Jonas Schult , Francis Engelmann , Theodora Kontogianni , Bastian Leibe

Early diagnosis of interstitial lung diseases is crucial for their treatment, but even experienced physicians find it difficult, as their clinical manifestations are similar. In order to assist with the diagnosis, computer-aided diagnosis…

Computer Vision and Pattern Recognition · Computer Science 2016-12-13 Stergios Christodoulidis , Marios Anthimopoulos , Lukas Ebner , Andreas Christe , Stavroula Mougiakakou

We propose a theoretical framework of multi-way similarity to model real-valued data into hypergraphs for clustering via spectral embedding. For graph cut based spectral clustering, it is common to model real-valued data into graph by…

Machine Learning · Computer Science 2022-08-17 Shota Saito

This research embarked on a comparative exploration of the holistic segmentation capabilities of Convolutional Neural Networks (CNNs) in both 2D and 3D formats, focusing on cystic fibrosis (CF) lesions. The study utilized data from two CF…

Image and Video Processing · Electrical Eng. & Systems 2024-08-13 Amel Imene Hadj Bouzid , Baudouin Denis de Senneville , Fabien Baldacci , Pascal Desbarats , Patrick Berger , Ilyes Benlala , Gaël Dournes

This is a summary of mathematical tools we used in research of analyzing the structure of proteins with amyloid form \cite{xi2024Top}. We defined several geometry indicators on the discrete curve namely the hop distance, the discrete…

Algebraic Topology · Mathematics 2025-02-11 Xiaoxi Lin , Yunpeng Zi , Fengling Li , Jingyan Li

Accurate geometric modeling of the aortic valve from 3D CT images is essential for biomechanical analysis and patient-specific simulations to assess valve health or make a preoperative plan. However, it remains challenging to generate…

Image and Video Processing · Electrical Eng. & Systems 2025-11-07 Linchen Qian , Jiasong Chen , Ruonan Gong , Wei Sun , Minliang Liu , Liang Liang

GANs are able to model accurately the distribution of complex, high-dimensional datasets, e.g. images. This makes high-quality GANs useful for unsupervised anomaly detection in medical imaging. However, differences in training datasets such…

Image and Video Processing · Electrical Eng. & Systems 2022-08-18 Sam Ellis , Octavio E. Martinez Manzanera , Vasileios Baltatzis , Ibrahim Nawaz , Arjun Nair , Loïc Le Folgoc , Sujal Desai , Ben Glocker , Julia A. Schnabel

Deformable registration continues to be one of the key challenges in medical image analysis. While iconic registration methods have started to benefit from the recent advances in medical deep learning, the same does not yet apply for the…

Computer Vision and Pattern Recognition · Computer Science 2019-09-18 Lasse Hansen , Doris Dittmer , Mattias P. Heinrich