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Background and Objective: In the realm of ophthalmic imaging, accurate vascular segmentation is paramount for diagnosing and managing various eye diseases. Contemporary deep learning-based vascular segmentation models rival human accuracy…

Image and Video Processing · Electrical Eng. & Systems 2026-04-21 Zhihao Zhao , Yinzheng Zhao , Junjie Yang , Quanmin Liang , Daniel Zapp , Kai Huang , M. Ali Nasseri

We propose a topology-constrained quantized nnUNet framework for efficient and anatomically accurate 3D tooth segmentation, addressing the challenges of spatial distortion introduced by quantization in deep learning models. The proposed…

Computer Vision and Pattern Recognition · Computer Science 2026-05-07 Paarth Prasad , Ruchika Malhotra

The constraint of neighborhood consistency or local consistency is widely used for robust image matching. In this paper, we focus on learning neighborhood topology consistent descriptors (TCDesc), while former works of learning descriptors,…

Computer Vision and Pattern Recognition · Computer Science 2020-09-16 Honghu Pan , Fanyang Meng , Nana Fan , Zhenyu He

Accurate vessel segmentation is crucial to assist in clinical diagnosis by medical experts. However, the intricate tree-like tubular structure of blood vessels poses significant challenges for existing segmentation algorithms. Small…

Image and Video Processing · Electrical Eng. & Systems 2025-07-08 Xiao Zhang , Zhuo Jin , Shaoxuan Wu , Fengyu Wang , Guansheng Peng , Xiang Zhang , Ying Huang , JingKun Chen , Jun Feng

Segmentation of tubular structures in vascular imaging is a well studied task, although it is rare that we try to infuse knowledge of the tree-like structure of the regions to be detected. Our work focuses on detecting the important…

Computer Vision and Pattern Recognition · Computer Science 2024-10-28 Théo Bertrand , Laurent D. Cohen

Almost all statistical and machine learning methods in analyzing brain networks rely on distances and loss functions, which are mostly Euclidean or matrix norms. The Euclidean or matrix distances may fail to capture underlying subtle…

Computational Geometry · Computer Science 2021-02-18 Moo K. Chung , Alexander Smith , Gary Shiu

Deep learning-based medical image segmentation techniques have shown promising results when evaluated based on conventional metrics such as the Dice score or Intersection-over-Union. However, these fully automatic methods often fail to meet…

Image and Video Processing · Electrical Eng. & Systems 2025-08-06 Liu Li , Qiang Ma , Cheng Ouyang , Johannes C. Paetzold , Daniel Rueckert , Bernhard Kainz

Skeletonization extracts thin representations from images that compactly encode their geometry and topology. These representations have become an important topological prior for preserving connectivity in curvilinear structures, aiding…

Image and Video Processing · Electrical Eng. & Systems 2025-03-11 Luis D. Reyes Vargas , Martin J. Menten , Johannes C. Paetzold , Nassir Navab , Mohammad Farid Azampour

Retinal vessel segmentation methods based on standard overlap losses tend to miss thin peripheral vessels because these structures occupy very few pixels and have low contrast against the background. We propose HMS-VesselNet, a hierarchical…

Image and Video Processing · Electrical Eng. & Systems 2026-03-24 Amarnath R

The Dice similarity coefficient (DSC) is both a widely used metric and loss function for biomedical image segmentation due to its robustness to class imbalance. However, it is well known that the DSC loss is poorly calibrated, resulting in…

Image and Video Processing · Electrical Eng. & Systems 2022-11-02 Michael Yeung , Leonardo Rundo , Yang Nan , Evis Sala , Carola-Bibiane Schönlieb , Guang Yang

Tubular structure segmentation in medical images, e.g., segmenting vessels in CT scans, serves as a vital step in the use of computers to aid in screening early stages of related diseases. But automatic tubular structure segmentation in CT…

Computer Vision and Pattern Recognition · Computer Science 2019-12-10 Yan Wang , Xu Wei , Fengze Liu , Jieneng Chen , Yuyin Zhou , Wei Shen , Elliot K. Fishman , Alan L. Yuille

Image segmentation is a largely researched field where neural networks find vast applications in many facets of technology. Some of the most popular approaches to train segmentation networks employ loss functions optimizing pixel-overlap,…

Computer Vision and Pattern Recognition · Computer Science 2022-11-29 Nico Stucki , Johannes C. Paetzold , Suprosanna Shit , Bjoern Menze , Ulrich Bauer

This paper introduces a novel deep-learning method for the automatic detection and segmentation of lung nodules, aimed at advancing the accuracy of early-stage lung cancer diagnosis. The proposed approach leverages a unique "Channel Squeeze…

Image and Video Processing · Electrical Eng. & Systems 2024-09-24 Mingxiu Sui , Jiacheng Hu , Tong Zhou , Zibo Liu , Likang Wen , Junliang Du

Triplet loss is widely used for learning local descriptors from image patch. However, triplet loss only minimizes the Euclidean distance between matching descriptors and maximizes that between the non-matching descriptors, which neglects…

Computer Vision and Pattern Recognition · Computer Science 2020-06-08 Honghu Pan , Fanyang Meng , Zhenyu He , Yongsheng Liang , Wei Liu

Many biological and medical tasks require the delineation of 3D curvilinear structures such as blood vessels and neurites from image volumes. This is typically done using neural networks trained by minimizing voxel-wise loss functions that…

Computer Vision and Pattern Recognition · Computer Science 2022-12-27 Doruk Oner , Hussein Osman , Mateusz Kozinski , Pascal Fua

Automatic segmentation of neuronal topology is critical for handling large scale neuroimaging data, as it can greatly accelerate neuron annotation and analysis. However, the intricate morphology of neuronal branches and the occlusions among…

Image and Video Processing · Electrical Eng. & Systems 2025-08-01 Huayu Fu , Jiamin Li , Haozhi Qu , Xiaolin Hu , Zengcai Guo

Deep learning has shown great potential for automated medical image segmentation to improve the precision and speed of disease diagnostics. However, the task presents significant difficulties due to variations in the scale, shape, texture,…

Image and Video Processing · Electrical Eng. & Systems 2024-09-06 Shahzaib Iqbal , Tariq M. Khan , Syed S. Naqvi , Asim Naveed , Erik Meijering

Widely used loss functions for CNN segmentation, e.g., Dice or cross-entropy, are based on integrals over the segmentation regions. Unfortunately, for highly unbalanced segmentations, such regional summations have values that differ by…

Image and Video Processing · Electrical Eng. & Systems 2020-10-20 Hoel Kervadec , Jihene Bouchtiba , Christian Desrosiers , Eric Granger , Jose Dolz , Ismail Ben Ayed

Data-driven fault detection has been regarded as a 3D image segmentation task. The models trained from synthetic data are difficult to generalize in some surveys. Recently, training 3D fault segmentation using sparse manual 2D slices is…

Computer Vision and Pattern Recognition · Computer Science 2024-10-28 Yimin Dou , Kewen Li , Jianbing Zhu , Timing Li , Shaoquan Tan , Zongchao Huang

We present TopoMortar, a brick wall dataset that is the first dataset specifically designed to evaluate topology-focused image segmentation methods, such as topology loss functions. Motivated by the known sensitivity of methods to dataset…

Computer Vision and Pattern Recognition · Computer Science 2025-08-19 Juan Miguel Valverde , Motoya Koga , Nijihiko Otsuka , Anders Bjorholm Dahl