Search Results for author: Nassir Navab

Found 365 papers, 117 papers with code

Recalibrating Fully Convolutional Networks with Spatial and Channel 'Squeeze & Excitation' Blocks

5 code implementations23 Aug 2018 Abhijit Guha Roy, Nassir Navab, Christian Wachinger

Towards this end, we introduce three variants of SE modules for segmentation, (i) squeezing spatially and exciting channel-wise, (ii) squeezing channel-wise and exciting spatially and (iii) joint spatial and channel 'squeeze & excitation'.

Image Classification Segmentation +1

V-Net: Fully Convolutional Neural Networks for Volumetric Medical Image Segmentation

27 code implementations15 Jun 2016 Fausto Milletari, Nassir Navab, Seyed-Ahmad Ahmadi

Convolutional Neural Networks (CNNs) have been recently employed to solve problems from both the computer vision and medical image analysis fields.

Image Segmentation Semantic Segmentation +1

An Efficient Training Algorithm for Kernel Survival Support Vector Machines

2 code implementations21 Nov 2016 Sebastian Pölsterl, Nassir Navab, Amin Katouzian

Survival analysis is a fundamental tool in medical research to identify predictors of adverse events and develop systems for clinical decision support.

Survival Analysis

Deep Residual Learning for Instrument Segmentation in Robotic Surgery

1 code implementation24 Mar 2017 Daniil Pakhomov, Vittal Premachandran, Max Allan, Mahdi Azizian, Nassir Navab

Detection, tracking, and pose estimation of surgical instruments are crucial tasks for computer assistance during minimally invasive robotic surgery.

Pose Estimation Segmentation

Structure-SLAM: Low-Drift Monocular SLAM in Indoor Environments

1 code implementation5 Aug 2020 Yanyan Li, Nikolas Brasch, Yida Wang, Nassir Navab, Federico Tombari

In this paper a low-drift monocular SLAM method is proposed targeting indoor scenarios, where monocular SLAM often fails due to the lack of textured surfaces.

Robotics

RGB-D SLAM with Structural Regularities

1 code implementation15 Oct 2020 Yanyan Li, Raza Yunus, Nikolas Brasch, Nassir Navab, Federico Tombari

This work proposes a RGB-D SLAM system specifically designed for structured environments and aimed at improved tracking and mapping accuracy by relying on geometric features that are extracted from the surrounding.

Robotics

Concurrent Spatial and Channel Squeeze & Excitation in Fully Convolutional Networks

10 code implementations7 Mar 2018 Abhijit Guha Roy, Nassir Navab, Christian Wachinger

Fully convolutional neural networks (F-CNNs) have set the state-of-the-art in image segmentation for a plethora of applications.

Brain Segmentation Image Classification +4

`Project & Excite' Modules for Segmentation of Volumetric Medical Scans

2 code implementations11 Jun 2019 Anne-Marie Rickmann, Abhijit Guha Roy, Ignacio Sarasua, Nassir Navab, Christian Wachinger

Fully Convolutional Neural Networks (F-CNNs) achieve state-of-the-art performance for image segmentation in medical imaging.

Brain Segmentation Image Segmentation +2

SO-Pose: Exploiting Self-Occlusion for Direct 6D Pose Estimation

2 code implementations ICCV 2021 Yan Di, Fabian Manhardt, Gu Wang, Xiangyang Ji, Nassir Navab, Federico Tombari

Directly regressing all 6 degrees-of-freedom (6DoF) for the object pose (e. g. the 3D rotation and translation) in a cluttered environment from a single RGB image is a challenging problem.

6D Pose Estimation 6D Pose Estimation using RGB +1

CNN-SLAM: Real-time dense monocular SLAM with learned depth prediction

1 code implementation CVPR 2017 Keisuke Tateno, Federico Tombari, Iro Laina, Nassir Navab

Given the recent advances in depth prediction from Convolutional Neural Networks (CNNs), this paper investigates how predicted depth maps from a deep neural network can be deployed for accurate and dense monocular reconstruction.

Depth Estimation Depth Prediction +1

X-ray-transform Invariant Anatomical Landmark Detection for Pelvic Trauma Surgery

2 code implementations22 Mar 2018 Bastian Bier, Mathias Unberath, Jan-Nico Zaech, Javad Fotouhi, Mehran Armand, Greg Osgood, Nassir Navab, Andreas Maier

In this work, we present a method to automatically detect anatomical landmarks in X-ray images independent of the viewing direction.

Anatomy Decision Making +1

Autoencoders for Unsupervised Anomaly Segmentation in Brain MR Images: A Comparative Study

1 code implementation7 Apr 2020 Christoph Baur, Stefan Denner, Benedikt Wiestler, Shadi Albarqouni, Nassir Navab

Deep unsupervised representation learning has recently led to new approaches in the field of Unsupervised Anomaly Detection (UAD) in brain MRI.

Anatomy Experimental Design +3

SUPRA: Open Source Software Defined Ultrasound Processing for Real-Time Applications

1 code implementation16 Nov 2017 Rüdiger Göbl, Nassir Navab, Christoph Hennersperger

Including all processing stages of a usual ultrasound pipeline, the run-time analysis shows that it can be executed in 2D and 3D on consumer GPUs in real-time.

RIO: 3D Object Instance Re-Localization in Changing Indoor Environments

1 code implementation ICCV 2019 Johanna Wald, Armen Avetisyan, Nassir Navab, Federico Tombari, Matthias Nießner

In this work, we introduce the task of 3D object instance re-localization (RIO): given one or multiple objects in an RGB-D scan, we want to estimate their corresponding 6DoF poses in another 3D scan of the same environment taken at a later point in time.

Object Scene Understanding

Shape Completion in the Dark: Completing Vertebrae Morphology from 3D Ultrasound

2 code implementations11 Apr 2024 Miruna-Alexandra Gafencu, Yordanka Velikova, Mahdi Saleh, Tamas Ungi, Nassir Navab, Thomas Wendler, Mohammad Farid Azampour

Purpose: Ultrasound (US) imaging, while advantageous for its radiation-free nature, is challenging to interpret due to only partially visible organs and a lack of complete 3D information.

Anatomy

Segmentation in Style: Unsupervised Semantic Image Segmentation with Stylegan and CLIP

1 code implementation26 Jul 2021 Daniil Pakhomov, Sanchit Hira, Narayani Wagle, Kemar E. Green, Nassir Navab

Derived regions are consistent across different images and coincide with human-defined semantic classes on some datasets.

Image Segmentation Segmentation +1

QuickNAT: A Fully Convolutional Network for Quick and Accurate Segmentation of Neuroanatomy

6 code implementations12 Jan 2018 Abhijit Guha Roy, Sailesh Conjeti, Nassir Navab, Christian Wachinger

We introduce QuickNAT, a fully convolutional, densely connected neural network that segments a \revision{MRI brain scan} in 20 seconds.

Brain Segmentation Decision Making +2

Bayesian QuickNAT: Model Uncertainty in Deep Whole-Brain Segmentation for Structure-wise Quality Control

2 code implementations24 Nov 2018 Abhijit Guha Roy, Sailesh Conjeti, Nassir Navab, Christian Wachinger

Next to voxel-wise uncertainty, we introduce four metrics to quantify structure-wise uncertainty in segmentation for quality control.

Brain Segmentation Segmentation

Fully-Convolutional Point Networks for Large-Scale Point Clouds

1 code implementation ECCV 2018 Dario Rethage, Johanna Wald, Jürgen Sturm, Nassir Navab, Federico Tombari

This work proposes a general-purpose, fully-convolutional network architecture for efficiently processing large-scale 3D data.

Semantic Segmentation

GPV-Pose: Category-level Object Pose Estimation via Geometry-guided Point-wise Voting

3 code implementations CVPR 2022 Yan Di, Ruida Zhang, Zhiqiang Lou, Fabian Manhardt, Xiangyang Ji, Nassir Navab, Federico Tombari

While 6D object pose estimation has recently made a huge leap forward, most methods can still only handle a single or a handful of different objects, which limits their applications.

 Ranked #1 on 6D Pose Estimation on LineMOD (Mean ADD-S metric)

6D Pose Estimation 6D Pose Estimation using RGB +3

Semantic Image Manipulation Using Scene Graphs

1 code implementation CVPR 2020 Helisa Dhamo, Azade Farshad, Iro Laina, Nassir Navab, Gregory D. Hager, Federico Tombari, Christian Rupprecht

In our work, we address the novel problem of image manipulation from scene graphs, in which a user can edit images by merely applying changes in the nodes or edges of a semantic graph that is generated from the image.

Image Inpainting Image Manipulation +1

Fairness by Learning Orthogonal Disentangled Representations

1 code implementation ECCV 2020 Mhd Hasan Sarhan, Nassir Navab, Abouzar Eslami, Shadi Albarqouni

We explicitly enforce the meaningful representation to be agnostic to sensitive information by entropy maximization.

Disentanglement Fairness

Graph-to-3D: End-to-End Generation and Manipulation of 3D Scenes Using Scene Graphs

1 code implementation ICCV 2021 Helisa Dhamo, Fabian Manhardt, Nassir Navab, Federico Tombari

Scene graphs are representations of a scene, composed of objects (nodes) and inter-object relationships (edges), proven to be particularly suited for this task, as they allow for semantic control on the generated content.

Object

SCFusion: Real-time Incremental Scene Reconstruction with Semantic Completion

2 code implementations26 Oct 2020 Shun-Cheng Wu, Keisuke Tateno, Nassir Navab, Federico Tombari

We propose a framework that ameliorates this issue by performing scene reconstruction and semantic scene completion jointly in an incremental and real-time manner, based on an input sequence of depth maps.

3D Semantic Scene Completion

Human Motion Analysis with Deep Metric Learning

2 code implementations ECCV 2018 Huseyin Coskun, David Joseph Tan, Sailesh Conjeti, Nassir Navab, Federico Tombari

Nevertheless, we believe that traditional approaches such as L2 distance or Dynamic Time Warping based on hand-crafted local pose metrics fail to appropriately capture the semantic relationship across motions and, as such, are not suitable for being employed as metrics within these tasks.

Dynamic Time Warping Metric Learning +1

Differentiable Graph Module (DGM) for Graph Convolutional Networks

1 code implementation11 Feb 2020 Anees Kazi, Luca Cosmo, Seyed-Ahmad Ahmadi, Nassir Navab, Michael Bronstein

We provide an extensive evaluation of applications from the domains of healthcare (disease prediction), brain imaging (age prediction), computer graphics (3D point cloud segmentation), and computer vision (zero-shot learning).

Disease Prediction Point Cloud Segmentation +1

TeCNO: Surgical Phase Recognition with Multi-Stage Temporal Convolutional Networks

2 code implementations24 Mar 2020 Tobias Czempiel, Magdalini Paschali, Matthias Keicher, Walter Simson, Hubertus Feussner, Seong Tae Kim, Nassir Navab

Automatic surgical phase recognition is a challenging and crucial task with the potential to improve patient safety and become an integral part of intra-operative decision-support systems.

Surgical phase recognition

RaDialog: A Large Vision-Language Model for Radiology Report Generation and Conversational Assistance

1 code implementation30 Nov 2023 Chantal Pellegrini, Ege Özsoy, Benjamin Busam, Nassir Navab, Matthias Keicher

Conversational AI tools that can generate and discuss clinically correct radiology reports for a given medical image have the potential to transform radiology.

Language Modelling Large Language Model

An Uncertainty-Driven GCN Refinement Strategy for Organ Segmentation

1 code implementation6 Dec 2020 Roger D. Soberanis-Mukul, Nassir Navab, Shadi Albarqouni

In this context, we proposed a segmentation refinement method based on uncertainty analysis and graph convolutional networks.

Graph Learning Organ Segmentation +1

4D-OR: Semantic Scene Graphs for OR Domain Modeling

1 code implementation22 Mar 2022 Ege Özsoy, Evin Pınar Örnek, Ulrich Eck, Tobias Czempiel, Federico Tombari, Nassir Navab

Towards this goal, for the first time, we propose using semantic scene graphs (SSG) to describe and summarize the surgical scene.

Scene Graph Generation

CFCM: Segmentation via Coarse to Fine Context Memory

1 code implementation4 Jun 2018 Fausto Milletari, Nicola Rieke, Maximilian Baust, Marco Esposito, Nassir Navab

Recent neural-network-based architectures for image segmentation make extensive usage of feature forwarding mechanisms to integrate information from multiple scales.

Image Segmentation Segmentation +1

Ultra-NeRF: Neural Radiance Fields for Ultrasound Imaging

1 code implementation25 Jan 2023 Magdalena Wysocki, Mohammad Farid Azampour, Christine Eilers, Benjamin Busam, Mehrdad Salehi, Nassir Navab

In our work, we discuss direction-dependent changes in the scene and show that a physics-inspired rendering improves the fidelity of US image synthesis.

Image Generation Neural Rendering

Y-Net: A Spatiospectral Dual-Encoder Networkfor Medical Image Segmentation

1 code implementation15 Apr 2022 Azade Farshad, Yousef Yeganeh, Peter Gehlbach, Nassir Navab

Automated segmentation of retinal optical coherence tomography (OCT) images has become an important recent direction in machine learning for medical applications.

 Ranked #1 on Retinal OCT Layer Segmentation on Duke SD-OCT (using extra training data)

Image Segmentation Medical Image Segmentation +3

MI-SegNet: Mutual Information-Based US Segmentation for Unseen Domain Generalization

3 code implementations22 Mar 2023 Yuan Bi, Zhongliang Jiang, Ricarda Clarenbach, Reza Ghotbi, Angelos Karlas, Nassir Navab

We validate the generalizability of the proposed domain-independent segmentation approach on several datasets with varying parameters and machines.

Anatomy Disentanglement +5

DISA: DIfferentiable Similarity Approximation for Universal Multimodal Registration

1 code implementation19 Jul 2023 Matteo Ronchetti, Wolfgang Wein, Nassir Navab, Oliver Zettinig, Raphael Prevost

Our method is several orders of magnitude faster than local patch-based metrics and can be directly applied in clinical settings by replacing the similarity measure with the proposed one.

Anatomy Image Registration

6D Camera Relocalization in Ambiguous Scenes via Continuous Multimodal Inference

2 code implementations ECCV 2020 Mai Bui, Tolga Birdal, Haowen Deng, Shadi Albarqouni, Leonidas Guibas, Slobodan Ilic, Nassir Navab

We present a multimodal camera relocalization framework that captures ambiguities and uncertainties with continuous mixture models defined on the manifold of camera poses.

Camera Relocalization

Object-aware Monocular Depth Prediction with Instance Convolutions

1 code implementation2 Dec 2021 Enis Simsar, Evin Pınar Örnek, Fabian Manhardt, Helisa Dhamo, Nassir Navab, Federico Tombari

With the advent of deep learning, estimating depth from a single RGB image has recently received a lot of attention, being capable of empowering many different applications ranging from path planning for robotics to computational cinematography.

Depth Estimation Depth Prediction +2

Image to Images Translation for Multi-Task Organ Segmentation and Bone Suppression in Chest X-Ray Radiography

1 code implementation24 Jun 2019 Mohammad Eslami, Solale Tabarestani, Shadi Albarqouni, Ehsan Adeli, Nassir Navab, Malek Adjouadi

Chest X-ray radiography is one of the earliest medical imaging technologies and remains one of the most widely-used for diagnosis, screening, and treatment follow up of diseases related to lungs and heart.

Decision Making Generative Adversarial Network +2

Rad-ReStruct: A Novel VQA Benchmark and Method for Structured Radiology Reporting

1 code implementation11 Jul 2023 Chantal Pellegrini, Matthias Keicher, Ege Özsoy, Nassir Navab

However, there is limited research on automating structured reporting, and no public benchmark is available for evaluating and comparing different methods.

Medical Visual Question Answering Question Answering +2

SecondPose: SE(3)-Consistent Dual-Stream Feature Fusion for Category-Level Pose Estimation

1 code implementation18 Nov 2023 Yamei Chen, Yan Di, Guangyao Zhai, Fabian Manhardt, Chenyangguang Zhang, Ruida Zhang, Federico Tombari, Nassir Navab, Benjamin Busam

Leveraging the advantage of DINOv2 in providing SE(3)-consistent semantic features, we hierarchically extract two types of SE(3)-invariant geometric features to further encapsulate local-to-global object-specific information.

Object Pose Estimation

Ultrasound-Guided Robotic Navigation with Deep Reinforcement Learning

3 code implementations30 Mar 2020 Hannes Hase, Mohammad Farid Azampour, Maria Tirindelli, Magdalini Paschali, Walter Simson, Emad Fatemizadeh, Nassir Navab

In this paper we introduce the first reinforcement learning (RL) based robotic navigation method which utilizes ultrasound (US) images as an input.

reinforcement-learning Reinforcement Learning (RL)

RA-GCN: Graph Convolutional Network for Disease Prediction Problems with Imbalanced Data

1 code implementation27 Feb 2021 Mahsa Ghorbani, Anees Kazi, Mahdieh Soleymani Baghshah, Hamid R. Rabiee, Nassir Navab

This is accomplished by associating a graph-based neural network to each class, which is responsible for weighting the class samples and changing the importance of each sample for the classifier.

Disease Prediction Node Classification

A Variational Bayesian Method for Similarity Learning in Non-Rigid Image Registration

1 code implementation CVPR 2022 Daniel Grzech, Mohammad Farid Azampour, Ben Glocker, Julia Schnabel, Nassir Navab, Bernhard Kainz, Loïc le Folgoc

We propose a novel variational Bayesian formulation for diffeomorphic non-rigid registration of medical images, which learns in an unsupervised way a data-specific similarity metric.

Image Registration

LumiPath -- Towards Real-time Physically-based Rendering on Embedded Devices

1 code implementation9 Mar 2019 Laura Fink, Sing Chun Lee, Jie Ying Wu, Xingtong Liu, Tianyu Song, Yordanka Stoyanova, Marc Stamminger, Nassir Navab, Mathias Unberath

With the increasing computational power of today's workstations, real-time physically-based rendering is within reach, rapidly gaining attention across a variety of domains.

Data Visualization Image Generation +1

Advancing Surgical VQA with Scene Graph Knowledge

2 code implementations15 Dec 2023 Kun Yuan, Manasi Kattel, Joel L. Lavanchy, Nassir Navab, Vinkle Srivastav, Nicolas Padoy

We highlight that the primary limitation in the current surgical VQA systems is the lack of scene knowledge to answer complex queries.

Question Answering Visual Question Answering

Simultaneous imputation and disease classification in incomplete medical datasets using Multigraph Geometric Matrix Completion (MGMC)

1 code implementation14 May 2020 Gerome Vivar, Anees Kazi, Hendrik Burwinkel, Andreas Zwergal, Nassir Navab, Seyed-Ahmad Ahmadi

As a solution, we propose an end-to-end learning of imputation and disease prediction of incomplete medical datasets via Multigraph Geometric Matrix Completion (MGMC).

Classification Disease Prediction +3

SupeRGB-D: Zero-shot Instance Segmentation in Cluttered Indoor Environments

1 code implementation22 Dec 2022 Evin Pınar Örnek, Aravindhan K Krishnan, Shreekant Gayaka, Cheng-Hao Kuo, Arnie Sen, Nassir Navab, Federico Tombari

We introduce a zero-shot split for Tabletop Objects Dataset (TOD-Z) to enable this study and present a method that uses annotated objects to learn the ``objectness'' of pixels and generalize to unseen object categories in cluttered indoor environments.

Instance Segmentation Object +2

S3M: Scalable Statistical Shape Modeling through Unsupervised Correspondences

1 code implementation15 Apr 2023 Lennart Bastian, Alexander Baumann, Emily Hoppe, Vincent Bürgin, Ha Young Kim, Mahdi Saleh, Benjamin Busam, Nassir Navab

Statistical shape models (SSMs) are an established way to represent the anatomy of a population with various clinically relevant applications.

Anatomy

Unsupervised Pre-Training on Patient Population Graphs for Patient-Level Predictions

2 code implementations23 Mar 2022 Chantal Pellegrini, Anees Kazi, Nassir Navab

We test our method on two medical datasets of patient records, TADPOLE and MIMIC-III, including imaging and non-imaging features and different prediction tasks.

Disease Prediction Imputation +2

Unsupervised pre-training of graph transformers on patient population graphs

2 code implementations21 Jul 2022 Chantal Pellegrini, Nassir Navab, Anees Kazi

We find that our proposed pre-training methods help in modeling the data at a patient and population level and improve performance in different fine-tuning tasks on all datasets.

Language Modelling Masked Language Modeling +2

CACTUSS: Common Anatomical CT-US Space for US examinations

1 code implementation18 Jul 2022 Yordanka Velikova, Walter Simson, Mehrdad Salehi, Mohammad Farid Azampour, Philipp Paprottka, Nassir Navab

Abdominal aortic aneurysm (AAA) is a vascular disease in which a section of the aorta enlarges, weakening its walls and potentially rupturing the vessel.

Image-to-Image Translation Segmentation

MIGS: Meta Image Generation from Scene Graphs

1 code implementation22 Oct 2021 Azade Farshad, Sabrina Musatian, Helisa Dhamo, Nassir Navab

We propose MIGS (Meta Image Generation from Scene Graphs), a meta-learning based approach for few-shot image generation from graphs that enables adapting the model to different scenes and increases the image quality by training on diverse sets of tasks.

Image Generation from Scene Graphs Meta-Learning +1

VesNet-RL: Simulation-based Reinforcement Learning for Real-World US Probe Navigation

1 code implementation10 May 2022 Yuan Bi, Zhongliang Jiang, Yuan Gao, Thomas Wendler, Angelos Karlas, Nassir Navab

The results demonstrate that proposed approach can effectively and accurately navigate the probe towards the longitudinal view of vessels.

Navigate reinforcement-learning +1

Semi-Supervised Deep Learning for Fully Convolutional Networks

1 code implementation17 Mar 2017 Christoph Baur, Shadi Albarqouni, Nassir Navab

Deep learning usually requires large amounts of labeled training data, but annotating data is costly and tedious.

Domain Adaptation Image Segmentation +3

Robust Optimization for Deep Regression

1 code implementation ICCV 2015 Vasileios Belagiannis, Christian Rupprecht, Gustavo Carneiro, Nassir Navab

Convolutional Neural Networks (ConvNets) have successfully contributed to improve the accuracy of regression-based methods for computer vision tasks such as human pose estimation, landmark localization, and object detection.

Age Estimation object-detection +3

Prior-RadGraphFormer: A Prior-Knowledge-Enhanced Transformer for Generating Radiology Graphs from X-Rays

1 code implementation24 Mar 2023 Yiheng Xiong, Jingsong Liu, Kamilia Zaripova, Sahand Sharifzadeh, Matthias Keicher, Nassir Navab

The extraction of structured clinical information from free-text radiology reports in the form of radiology graphs has been demonstrated to be a valuable approach for evaluating the clinical correctness of report-generation methods.

Decision Making Multi-Label Classification +1

LOTUS: Learning to Optimize Task-based US representations

1 code implementation29 Jul 2023 Yordanka Velikova, Mohammad Farid Azampour, Walter Simson, Vanessa Gonzalez Duque, Nassir Navab

Anatomical segmentation of organs in ultrasound images is essential to many clinical applications, particularly for diagnosis and monitoring.

Image Generation Segmentation

Semi-Supervised Federated Peer Learning for Skin Lesion Classification

1 code implementation5 Mar 2021 Tariq Bdair, Nassir Navab, Shadi Albarqouni

With few annotated data, FedPerl is on par with a state-of-the-art method in skin lesion classification in the standard setup while outperforming SSFLs and the baselines by 1. 8% and 15. 8%, respectively.

Classification Federated Learning +4

Towards Semantic Interpretation of Thoracic Disease and COVID-19 Diagnosis Models

1 code implementation4 Apr 2021 Ashkan Khakzar, Sabrina Musatian, Jonas Buchberger, Icxel Valeriano Quiroz, Nikolaus Pinger, Soroosh Baselizadeh, Seong Tae Kim, Nassir Navab

We present our findings using publicly available chest pathologies (CheXpert, NIH ChestX-ray8) and COVID-19 datasets (BrixIA, and COVID-19 chest X-ray segmentation dataset).

COVID-19 Diagnosis

Towards Autonomous Atlas-based Ultrasound Acquisitions in Presence of Articulated Motion

1 code implementation10 Aug 2022 Zhongliang Jiang, Yuan Gao, Le Xie, Nassir Navab

Robotic ultrasound (US) imaging aims at overcoming some of the limitations of free-hand US examinations, e. g. difficulty in guaranteeing intra- and inter-operator repeatability.

Robot-Assisted Deep Venous Thrombosis Ultrasound Examination using Virtual Fixture

1 code implementation4 Jan 2024 Dianye Huang, Chenguang Yang, Mingchuan Zhou, Angelos Karlas, Nassir Navab, Zhongliang Jiang

To ensure the biometric measurements obtained in different examinations are comparable, the 6D scanning path is determined in a coarse-to-fine manner using both an external RGBD camera and US images.

Position

Semi-Supervised Few-Shot Learning with Prototypical Random Walks

1 code implementation6 Mar 2019 Ahmed Ayyad, Yuchen Li, Nassir Navab, Shadi Albarqouni, Mohamed Elhoseiny

We develop a random walk semi-supervised loss that enables the network to learn representations that are compact and well-separated.

Few-Shot Learning

LABRAD-OR: Lightweight Memory Scene Graphs for Accurate Bimodal Reasoning in Dynamic Operating Rooms

1 code implementation23 Mar 2023 Ege Özsoy, Tobias Czempiel, Felix Holm, Chantal Pellegrini, Nassir Navab

The holistic representation of surgical scenes as semantic scene graphs (SGG), where entities are represented as nodes and relations between them as edges, is a promising direction for fine-grained semantic OR understanding.

Scene Graph Generation

Learning Multi-modal Representations by Watching Hundreds of Surgical Video Lectures

1 code implementation27 Jul 2023 Kun Yuan, Vinkle Srivastav, Tong Yu, Joel L. Lavanchy, Pietro Mascagni, Nassir Navab, Nicolas Padoy

SurgVLP constructs a new contrastive learning objective to align video clip embeddings with the corresponding multiple text embeddings by bringing them together within a joint latent space.

Automatic Speech Recognition Contrastive Learning +6

Deep Autoencoding Models for Unsupervised Anomaly Segmentation in Brain MR Images

1 code implementation12 Apr 2018 Christoph Baur, Benedikt Wiestler, Shadi Albarqouni, Nassir Navab

Reliably modeling normality and differentiating abnormal appearances from normal cases is a very appealing approach for detecting pathologies in medical images.

Anatomy Clustering +3

Longitudinal Quantitative Assessment of COVID-19 Infection Progression from Chest CTs

1 code implementation12 Mar 2021 Seong Tae Kim, Leili Goli, Magdalini Paschali, Ashkan Khakzar, Matthias Keicher, Tobias Czempiel, Egon Burian, Rickmer Braren, Nassir Navab, Thomas Wendler

Chest computed tomography (CT) has played an essential diagnostic role in assessing patients with COVID-19 by showing disease-specific image features such as ground-glass opacity and consolidation.

Computed Tomography (CT) COVID-19 Image Segmentation +2

GKD: Semi-supervised Graph Knowledge Distillation for Graph-Independent Inference

1 code implementation8 Apr 2021 Mahsa Ghorbani, Mojtaba Bahrami, Anees Kazi, Mahdieh SoleymaniBaghshah, Hamid R. Rabiee, Nassir Navab

The soft pseudo-labels are then used to train a deep student network for disease prediction of unseen test data for which the graph modality is unavailable.

Disease Prediction graph construction +1

Unsupervised Cross-Domain Feature Extraction for Single Blood Cell Image Classification

1 code implementation1 Jul 2022 Raheleh Salehi, Ario Sadafi, Armin Gruber, Peter Lienemann, Nassir Navab, Shadi Albarqouni, Carsten Marr

Here, we propose a cross-domain adapted autoencoder to extract features in an unsupervised manner on three different datasets of single white blood cells scanned from peripheral blood smears.

Image Classification

Intelligent Robotic Sonographer: Mutual Information-based Disentangled Reward Learning from Few Demonstrations

1 code implementation7 Jul 2023 Zhongliang Jiang, Yuan Bi, Mingchuan Zhou, Ying Hu, Michael Burke, Nassir Navab

The results demonstrated that the proposed advanced framework can robustly work on a variety of seen and unseen phantoms as well as in-vivo human carotid data.

Navigate

Motion Magnification in Robotic Sonography: Enabling Pulsation-Aware Artery Segmentation

1 code implementation7 Jul 2023 Dianye Huang, Yuan Bi, Nassir Navab, Zhongliang Jiang

To validate the proposed robotic US system for imaging arteries, experiments are carried out on volunteers' carotid and radial arteries.

Motion Magnification Segmentation

Thoracic Cartilage Ultrasound-CT Registration using Dense Skeleton Graph

1 code implementation7 Jul 2023 Zhongliang Jiang, Chenyang Li, Xuesong Li, Nassir Navab

To address this challenge, a graph-based non-rigid registration is proposed to enable transferring planned paths from the atlas to the current setup by explicitly considering subcutaneous bone surface features instead of the skin surface.

Template Matching

DisguisOR: Holistic Face Anonymization for the Operating Room

1 code implementation26 Jul 2023 Lennart Bastian, Tony Danjun Wang, Tobias Czempiel, Benjamin Busam, Nassir Navab

Methods: RGB and depth images from multiple cameras are fused into a 3D point cloud representation of the scene.

Face Anonymization

DefCor-Net: Physics-Aware Ultrasound Deformation Correction

1 code implementation7 Aug 2023 Zhongliang Jiang, Yue Zhou, Dongliang Cao, Nassir Navab

The recovery of morphologically accurate anatomical images from deformed ones is challenging in ultrasound (US) image acquisition, but crucial to accurate and consistent diagnosis, particularly in the emerging field of computer-assisted diagnosis.

Anatomy

On the Localization of Ultrasound Image Slices within Point Distribution Models

1 code implementation1 Sep 2023 Lennart Bastian, Vincent Bürgin, Ha Young Kim, Alexander Baumann, Benjamin Busam, Mahdi Saleh, Nassir Navab

We demonstrate that our multi-modal registration framework can localize images on the 3D surface topology of a patient-specific organ and the mean shape of an SSM.

3D Reconstruction 3D Shape Representation +2

Force-Ultrasound Fusion: Bringing Spine Robotic-US to the Next "Level"

1 code implementation26 Feb 2020 Maria Tirindelli, Maria Victorova, Javier Esteban, Seong Tae Kim, David Navarro-Alarcon, Yong Ping Zheng, Nassir Navab

Processed force and ultrasound data are fused using a 1D Convolutional Network to compute the location of the vertebral levels.

Scale-Space Autoencoders for Unsupervised Anomaly Segmentation in Brain MRI

1 code implementation23 Jun 2020 Christoph Baur, Benedikt Wiestler, Shadi Albarqouni, Nassir Navab

Brain pathologies can vary greatly in size and shape, ranging from few pixels (i. e. MS lesions) to large, space-occupying tumors.

Deep Bingham Networks: Dealing with Uncertainty and Ambiguity in Pose Estimation

1 code implementation20 Dec 2020 Haowen Deng, Mai Bui, Nassir Navab, Leonidas Guibas, Slobodan Ilic, Tolga Birdal

For the former we contributed our own dataset composed of five indoor scenes where it is unavoidable to capture images corresponding to views that are hard to uniquely identify.

Camera Relocalization Pose Estimation

Speckle2Speckle: Unsupervised Learning of Ultrasound Speckle Filtering Without Clean Data

1 code implementation31 Jul 2022 Rüdiger Göbl, Christoph Hennersperger, Nassir Navab

To enable this, we make use of realistic ultrasound simulation techniques that allow for instantiation of several independent speckle realizations that represent the exact same tissue, thus allowing for the application of image reconstruction techniques that work with pairs of differently corrupted data.

Image Reconstruction

KST-Mixer: Kinematic Spatio-Temporal Data Mixer For Colon Shape Estimation

1 code implementation2 Feb 2023 Masahiro Oda, Kazuhiro Furukawa, Nassir Navab, Kensaku MORI

Kinematic data of a colonoscope and the colon, including positions and directions of their centerlines, are obtained using electromagnetic and depth sensors.

Intelligent Masking: Deep Q-Learning for Context Encoding in Medical Image Analysis

1 code implementation25 Mar 2022 Mojtaba Bahrami, Mahsa Ghorbani, Nassir Navab

We show that training the agent against the prediction model can significantly improve the semantic features extracted for downstream classification tasks.

Q-Learning Self-Supervised Learning

DopUS-Net: Quality-Aware Robotic Ultrasound Imaging based on Doppler Signal

1 code implementation15 May 2023 Zhongliang Jiang, Felix Duelmer, Nassir Navab

The experimental results demonstrate that the proposed approach with the re-identification process can significantly improve the accuracy and robustness of the segmentation results (dice score: from 0:54 to 0:86; intersection over union: from 0:47 to 0:78).

Image Segmentation Region Proposal +2

Inherent Brain Segmentation Quality Control from Fully ConvNet Monte Carlo Sampling

no code implementations19 Apr 2018 Abhijit Guha Roy, Sailesh Conjeti, Nassir Navab, Christian Wachinger

We introduce inherent measures for effective quality control of brain segmentation based on a Bayesian fully convolutional neural network, using model uncertainty.

Brain Segmentation Segmentation +1

Generalizing multistain immunohistochemistry tissue segmentation using one-shot color deconvolution deep neural networks

no code implementations17 May 2018 Amal Lahiani, Jacob Gildenblat, Irina Klaman, Nassir Navab, Eldad Klaiman

A key challenge in cancer immunotherapy biomarker research is quantification of pattern changes in microscopic whole slide images of tumor biopsies.

whole slide images

Situation Assessment for Planning Lane Changes: Combining Recurrent Models and Prediction

no code implementations17 May 2018 Oliver Scheel, Loren Schwarz, Nassir Navab, Federico Tombari

One of the greatest challenges towards fully autonomous cars is the understanding of complex and dynamic scenes.

When Regression Meets Manifold Learning for Object Recognition and Pose Estimation

no code implementations16 May 2018 Mai Bui, Sergey Zakharov, Shadi Albarqouni, Slobodan Ilic, Nassir Navab

By combining the strengths of manifold learning using triplet loss and pose regression, we could either estimate the pose directly reducing the complexity compared to NN search, or use learned descriptor for the NN descriptor matching.

Multi-Task Learning Object Recognition +4

Multi Layered-Parallel Graph Convolutional Network (ML-PGCN) for Disease Prediction

no code implementations28 Apr 2018 Anees Kazi, Shadi Albarqouni, Karsten Kortuem, Nassir Navab

Structural data from Electronic Health Records as complementary information to imaging data for disease prediction.

Disease Prediction

Analyzing and Exploiting NARX Recurrent Neural Networks for Long-Term Dependencies

no code implementations ICLR 2018 Robert DiPietro, Christian Rupprecht, Nassir Navab, Gregory D. Hager

Recurrent neural networks (RNNs) have achieved state-of-the-art performance on many diverse tasks, from machine translation to surgical activity recognition, yet training RNNs to capture long-term dependencies remains difficult.

Activity Recognition Machine Translation +1

Domain and Geometry Agnostic CNNs for Left Atrium Segmentation in 3D Ultrasound

no code implementations20 Apr 2018 Markus A. Degel, Nassir Navab, Shadi Albarqouni

Segmentation of the left atrium and deriving its size can help to predict and detect various cardiovascular conditions.

Domain Adaptation Left Atrium Segmentation +1

MelanoGANs: High Resolution Skin Lesion Synthesis with GANs

no code implementations12 Apr 2018 Christoph Baur, Shadi Albarqouni, Nassir Navab

Generative Adversarial Networks (GANs) have been successfully used to synthesize realistically looking images of faces, scenery and even medical images.

Image Generation Lesion Classification +2

Exploiting Partial Structural Symmetry For Patient-Specific Image Augmentation in Trauma Interventions

no code implementations9 Apr 2018 Javad Fotouhi, Mathias Unberath, Giacomo Taylor, Arash Ghaani Farashahi, Bastian Bier, Russell H. Taylor, Greg M. Osgood, M. D., Mehran Armand, Nassir Navab

The main challenge is to automatically estimate the desired plane of symmetry within the patient's pre-operative CT. We propose to estimate this plane using a non-linear optimization strategy, by minimizing Tukey's biweight robust estimator, relying on the partial symmetry of the anatomy.

Anatomy Image Augmentation

Webly Supervised Learning for Skin Lesion Classification

no code implementations31 Mar 2018 Fernando Navarro, Sailesh Conjeti, Federico Tombari, Nassir Navab

Within medical imaging, manual curation of sufficient well-labeled samples is cost, time and scale-prohibitive.

Classification General Classification +4

Multi-modal Disease Classification in Incomplete Datasets Using Geometric Matrix Completion

no code implementations30 Mar 2018 Gerome Vivar, Andreas Zwergal, Nassir Navab, Seyed-Ahmad Ahmadi

In this work, we follow up on the idea of modeling multi-modal disease classification as a matrix completion problem, with simultaneous classification and non-linear imputation of features.

Classification General Classification +2

Guide Me: Interacting with Deep Networks

no code implementations CVPR 2018 Christian Rupprecht, Iro Laina, Nassir Navab, Gregory D. Hager, Federico Tombari

Interaction and collaboration between humans and intelligent machines has become increasingly important as machine learning methods move into real-world applications that involve end users.

Image Captioning Image Generation

Generalizability vs. Robustness: Adversarial Examples for Medical Imaging

no code implementations23 Mar 2018 Magdalini Paschali, Sailesh Conjeti, Fernando Navarro, Nassir Navab

In this paper, for the first time, we propose an evaluation method for deep learning models that assesses the performance of a model not only in an unseen test scenario, but also in extreme cases of noise, outliers and ambiguous input data.

Brain Segmentation General Classification +2

A Minimalist Approach to Type-Agnostic Detection of Quadrics in Point Clouds

no code implementations CVPR 2018 Tolga Birdal, Benjamin Busam, Nassir Navab, Slobodan Ilic, Peter Sturm

As opposed to state-of-the-art, where a tailored algorithm treats each primitive type separately, we propose to encapsulate all types in a single robust detection procedure.

Scene Understanding

Fast 5DOF Needle Tracking in iOCT

no code implementations18 Feb 2018 Jakob Weiss, Nicola Rieke, Mohammad Ali Nasseri, Mathias Maier, Abouzar Eslami, Nassir Navab

We propose to build on its desirable qualities and present a method for tracking the orientation and location of a surgical needle.

Multi-layer Visualization for Medical Mixed Reality

no code implementations26 Sep 2017 Séverine Habert, Ma Meng, Pascal Fallavollita, Nassir Navab

In this paper and to our knowledge, we propose a multi-layer visualization in Medical Mixed Reality solution which subtly improves a surgeon's visualization by making transparent the occluding objects.

Mixed Reality

6D Object Pose Estimation with Depth Images: A Seamless Approach for Robotic Interaction and Augmented Reality

no code implementations5 Sep 2017 David Joseph Tan, Nassir Navab, Federico Tombari

To determine the 3D orientation and 3D location of objects in the surroundings of a camera mounted on a robot or mobile device, we developed two powerful algorithms in object detection and temporal tracking that are combined seamlessly for robotic perception and interaction as well as Augmented Reality (AR).

6D Pose Estimation using RGB Object +2

The TUM LapChole dataset for the M2CAI 2016 workflow challenge

no code implementations28 Oct 2016 Ralf Stauder, Daniel Ostler, Michael Kranzfelder, Sebastian Koller, Hubertus Feußner, Nassir Navab

In this technical report we present our collected dataset of laparoscopic cholecystectomies (LapChole).

Camera Pose Filtering with Local Regression Geodesics on the Riemannian Manifold of Dual Quaternions

no code implementations24 Apr 2017 Benjamin Busam, Tolga Birdal, Nassir Navab

Time-varying, smooth trajectory estimation is of great interest to the vision community for accurate and well behaving 3D systems.

Pose Tracking regression +1

Long Short-Term Memory Kalman Filters:Recurrent Neural Estimators for Pose Regularization

no code implementations6 Aug 2017 Huseyin Coskun, Felix Achilles, Robert DiPietro, Nassir Navab, Federico Tombari

One-shot pose estimation for tasks such as body joint localization, camera pose estimation, and object tracking are generally noisy, and temporal filters have been extensively used for regularization.

Object Tracking Pose Estimation

Learning-based Surgical Workflow Detection from Intra-Operative Signals

no code implementations2 Jun 2017 Ralf Stauder, Ergün Kayis, Nassir Navab

A modern operating room (OR) provides a plethora of advanced medical devices.

X-ray In-Depth Decomposition: Revealing The Latent Structures

no code implementations19 Dec 2016 Shadi Albarqouni, Javad Fotouhi, Nassir Navab

X-ray radiography is the most readily available imaging modality and has a broad range of applications that spans from diagnosis to intra-operative guidance in cardiac, orthopedics, and trauma procedures.

Anatomy

Learning Robust Hash Codes for Multiple Instance Image Retrieval

no code implementations16 Mar 2017 Sailesh Conjeti, Magdalini Paschali, Amin Katouzian, Nassir Navab

In this paper, for the first time, we introduce a multiple instance (MI) deep hashing technique for learning discriminative hash codes with weak bag-level supervision suited for large-scale retrieval.

Deep Hashing Image Retrieval +1

Cross-Modal Manifold Learning for Cross-modal Retrieval

no code implementations19 Dec 2016 Sailesh Conjeti, Anees Kazi, Nassir Navab, Amin Katouzian

This paper presents a new scalable algorithm for cross-modal similarity preserving retrieval in a learnt manifold space.

Cross-Modal Retrieval Retrieval

Deep Residual Hashing

no code implementations16 Dec 2016 Sailesh Conjeti, Abhijit Guha Roy, Amin Katouzian, Nassir Navab

Hashing aims at generating highly compact similarity preserving code words which are well suited for large-scale image retrieval tasks.

Binarization Image Retrieval +3

A Deep Metric for Multimodal Registration

no code implementations17 Sep 2016 Martin Simonovsky, Benjamín Gutiérrez-Becker, Diana Mateus, Nassir Navab, Nikos Komodakis

Multimodal registration is a challenging problem in medical imaging due the high variability of tissue appearance under different imaging modalities.

Mitosis Detection in Intestinal Crypt Images with Hough Forest and Conditional Random Fields

no code implementations26 Aug 2016 Gerda Bortsova, Michael Sterr, Lichao Wang, Fausto Milletari, Nassir Navab, Anika Böttcher, Heiko Lickert, Fabian Theis, Tingying Peng

A statistical analysis of these measurements requires annotation of mitosis events, which is currently a tedious and time-consuming task that has to be performed manually.

Mitosis Detection

An Octree-Based Approach towards Efficient Variational Range Data Fusion

no code implementations26 Aug 2016 Wadim Kehl, Tobias Holl, Federico Tombari, Slobodan Ilic, Nassir Navab

Volume-based reconstruction is usually expensive both in terms of memory consumption and runtime.

Deep Active Contours

no code implementations18 Jul 2016 Christian Rupprecht, Elizabeth Huaroc, Maximilian Baust, Nassir Navab

We propose a method for interactive boundary extraction which combines a deep, patch-based representation with an active contour framework.

Interactive Segmentation

A Taxonomy and Library for Visualizing Learned Features in Convolutional Neural Networks

no code implementations24 Jun 2016 Felix Grün, Christian Rupprecht, Nassir Navab, Federico Tombari

Over the last decade, Convolutional Neural Networks (CNN) saw a tremendous surge in performance.

Semi-Automatic Segmentation of Autosomal Dominant Polycystic Kidneys using Random Forests

no code implementations23 Oct 2015 Kanishka Sharma, Loic Peter, Christian Rupprecht, Anna Caroli, Lichao Wang, Andrea Remuzzi, Maximilian Baust, Nassir Navab

This paper presents a method for 3D segmentation of kidneys from patients with autosomal dominant polycystic kidney disease (ADPKD) and severe renal insufficiency, using computed tomography (CT) data.

Computed Tomography (CT) Segmentation

Augmented Reality-based Feedback for Technician-in-the-loop C-arm Repositioning

no code implementations22 Jun 2018 Mathias Unberath, Javad Fotouhi, Jonas Hajek, Andreas Maier, Greg Osgood, Russell Taylor, Mehran Armand, Nassir Navab

For C-arm repositioning to a particular target view, the recorded C-arm pose is restored as a virtual object and visualized in an AR environment, serving as a perceptual reference for the technician.

Anatomy

SynNet: Structure-Preserving Fully Convolutional Networks for Medical Image Synthesis

no code implementations29 Jun 2018 Deepa Gunashekar, Sailesh Conjeti, Abhijit Guha Roy, Nassir Navab, Kuangyu Shi

Cross modal image syntheses is gaining significant interests for its ability to estimate target images of a different modality from a given set of source images, like estimating MR to MR, MR to CT, CT to PET etc, without the need for an actual acquisition. Though they show potential for applications in radiation therapy planning, image super resolution, atlas construction, image segmentation etc. The synthesis results are not as accurate as the actual acquisition. In this paper, we address the problem of multi modal image synthesis by proposing a fully convolutional deep learning architecture called the SynNet. We extend the proposed architecture for various input output configurations.

Image Generation Image Segmentation +2

Competition vs. Concatenation in Skip Connections of Fully Convolutional Networks

no code implementations20 Jul 2018 Santiago Estrada, Sailesh Conjeti, Muneer Ahmad, Nassir Navab, Martin Reuter

Increased information sharing through short and long-range skip connections between layers in fully convolutional networks have demonstrated significant improvement in performance for semantic segmentation.

Segmentation Semantic Segmentation

Peeking Behind Objects: Layered Depth Prediction from a Single Image

no code implementations23 Jul 2018 Helisa Dhamo, Keisuke Tateno, Iro Laina, Nassir Navab, Federico Tombari

While conventional depth estimation can infer the geometry of a scene from a single RGB image, it fails to estimate scene regions that are occluded by foreground objects.

Depth Estimation Depth Prediction

Generating Highly Realistic Images of Skin Lesions with GANs

no code implementations5 Sep 2018 Christoph Baur, Shadi Albarqouni, Nassir Navab

As many other machine learning driven medical image analysis tasks, skin image analysis suffers from a chronic lack of labeled data and skewed class distributions, which poses problems for the training of robust and well-generalizing models.

BIG-bench Machine Learning Lesion Segmentation +1

GANs for Medical Image Analysis

no code implementations13 Sep 2018 Salome Kazeminia, Christoph Baur, Arjan Kuijper, Bram van Ginneken, Nassir Navab, Shadi Albarqouni, Anirban Mukhopadhyay

Generative Adversarial Networks (GANs) and their extensions have carved open many exciting ways to tackle well known and challenging medical image analysis problems such as medical image de-noising, reconstruction, segmentation, data simulation, detection or classification.

General Classification

Virtualization of tissue staining in digital pathology using an unsupervised deep learning approach

no code implementations15 Oct 2018 Amal Lahiani, Jacob Gildenblat, Irina Klaman, Shadi Albarqouni, Nassir Navab, Eldad Klaiman

Histopathological evaluation of tissue samples is a key practice in patient diagnosis and drug development, especially in oncology.

InfiNet: Fully Convolutional Networks for Infant Brain MRI Segmentation

no code implementations11 Oct 2018 Shubham Kumar, Sailesh Conjeti, Abhijit Guha Roy, Christian Wachinger, Nassir Navab

We present a novel, parameter-efficient and practical fully convolutional neural network architecture, termed InfiNet, aimed at voxel-wise semantic segmentation of infant brain MRI images at iso-intense stage, which can be easily extended for other segmentation tasks involving multi-modalities.

Infant Brain Mri Segmentation MRI segmentation +2

Adversarial Semantic Scene Completion from a Single Depth Image

no code implementations25 Oct 2018 Yida Wang, David Joseph Tan, Nassir Navab, Federico Tombari

We propose a method to reconstruct, complete and semantically label a 3D scene from a single input depth image.

Dealing with Ambiguity in Robotic Grasping via Multiple Predictions

no code implementations2 Nov 2018 Ghazal Ghazaei, Iro Laina, Christian Rupprecht, Federico Tombari, Nassir Navab, Kianoush Nazarpour

Further, we reformulate the problem of robotic grasping by replacing conventional grasp rectangles with grasp belief maps, which hold more precise location information than a rectangle and account for the uncertainty inherent to the task.

Robotic Grasping

Redefining Ultrasound Compounding: Computational Sonography

no code implementations5 Nov 2018 Rüdiger Göbl, Diana Mateus, Christoph Hennersperger, Maximilian Baust, Nassir Navab

By providing a novel paradigm for the acquisition and reconstruction of tracked freehand 3D ultrasound, this work presents the concept of Computational Sonography (CS) to model the directionality of ultrasound information.

Explaining the Ambiguity of Object Detection and 6D Pose From Visual Data

no code implementations ICCV 2019 Fabian Manhardt, Diego Martin Arroyo, Christian Rupprecht, Benjamin Busam, Tolga Birdal, Nassir Navab, Federico Tombari

For each object instance we predict multiple pose and class outcomes to estimate the specific pose distribution generated by symmetries and repetitive textures.

3D Object Detection Object +3

Distortion-Aware Convolutional Filters for Dense Prediction in Panoramic Images

no code implementations ECCV 2018 Keisuke Tateno, Nassir Navab, Federico Tombari

There is a high demand of 3D data for 360° panoramic images and videos, pushed by the growing availability on the market of specialized hardware for both capturing (e. g., omnidirectional cameras) as well as visualizing in 3D (e. g., head mounted displays) panoramic images and videos.

Depth Estimation Semantic Segmentation +1

Self-Attention Equipped Graph Convolutions for Disease Prediction

no code implementations24 Dec 2018 Anees Kazi, S. Arvind krishna, Shayan Shekarforoush, Karsten Kortuem, Shadi Albarqouni, Nassir Navab

A model capable of leveraging the individuality of each multi-modal data is required for better disease prediction.

Disease Prediction

Generic Primitive Detection in Point Clouds Using Novel Minimal Quadric Fits

no code implementations4 Jan 2019 Tolga Birdal, Benjamin Busam, Nassir Navab, Slobodan Ilic, Peter Sturm

Based upon the idea of aligning the quadric gradients with the surface normals, our first formulation is exact and requires as low as four oriented points.

Data Augmentation with Manifold Exploring Geometric Transformations for Increased Performance and Robustness

no code implementations14 Jan 2019 Magdalini Paschali, Walter Simson, Abhijit Guha Roy, Muhammad Ferjad Naeem, Rüdiger Göbl, Christian Wachinger, Nassir Navab

Compared with traditional augmentation methods, and with images synthesized by Generative Adversarial Networks our method not only achieves state-of-the-art performance but also significantly improves the network's robustness.

Data Augmentation General Classification +2

Human Shape and Pose Tracking Using Keyframes

no code implementations CVPR 2014 Chun-Hao Huang, Edmond Boyer, Nassir Navab, Slobodan Ilic

In contrast to many existing approaches that rely on a single reference model, multiple templates represent a larger variability of human poses.

Pose Tracking

Total Variation Regularization of Shape Signals

no code implementations CVPR 2015 Maximilian Baust, Laurent Demaret, Martin Storath, Nassir Navab, Andreas Weinmann

This paper introduces the concept of shape signals, i. e., series of shapes which have a natural temporal or spatial ordering, as well as a variational formulation for the regularization of these signals.

Toward User-Specific Tracking by Detection of Human Shapes in Multi-Cameras

no code implementations CVPR 2015 Chun-Hao Huang, Edmond Boyer, Bibiana do Canto Angonese, Nassir Navab, Slobodan Ilic

It usually comprises an association step, that finds correspondences between the model and the input data, and a deformation step, that fits the model to the observations given correspondences.

Temporal Sequences

Volumetric 3D Tracking by Detection

no code implementations CVPR 2016 Chun-Hao Huang, Benjamin Allain, Jean-Sebastien Franco, Nassir Navab, Slobodan Ilic, Edmond Boyer

In this paper, we propose a new framework for 3D tracking by detection based on fully volumetric representations.

Computational Efficiency

Weakly-Supervised Structured Output Learning With Flexible and Latent Graphs Using High-Order Loss Functions

no code implementations ICCV 2015 Gustavo Carneiro, Tingying Peng, Christine Bayer, Nassir Navab

We introduce two new structured output models that use a latent graph, which is flexible in terms of the number of nodes and structure, where the training process minimises a high-order loss function using a weakly annotated training set.

A Versatile Learning-Based 3D Temporal Tracker: Scalable, Robust, Online

no code implementations ICCV 2015 David Joseph Tan, Federico Tombari, Slobodan Ilic, Nassir Navab

This paper proposes a temporal tracking algorithm based on Random Forest that uses depth images to estimate and track the 3D pose of a rigid object in real-time.

Occlusion Handling

Long Short-Term Memory Kalman Filters: Recurrent Neural Estimators for Pose Regularization

no code implementations ICCV 2017 Huseyin Coskun, Felix Achilles, Robert DiPietro, Nassir Navab, Federico Tombari

One-shot pose estimation for tasks such as body joint localization, camera pose estimation, and object tracking are generally noisy, and temporal filters have been extensively used for regularization.

Object Tracking Pose Estimation

Precise Proximal Femur Fracture Classification for Interactive Training and Surgical Planning

no code implementations4 Feb 2019 Amelia Jiménez-Sánchez, Anees Kazi, Shadi Albarqouni, Chlodwig Kirchhoff, Peter Biberthaler, Nassir Navab, Sonja Kirchhoff, Diana Mateus

We demonstrate the feasibility of a fully automatic computer-aided diagnosis (CAD) tool, based on deep learning, that localizes and classifies proximal femur fractures on X-ray images according to the AO classification.

Classification General Classification +3

Attention-based Lane Change Prediction

no code implementations4 Mar 2019 Oliver Scheel, Naveen Shankar Nagaraja, Loren Schwarz, Nassir Navab, Federico Tombari

Lane change prediction of surrounding vehicles is a key building block of path planning.

Adversarial Networks for Camera Pose Regression and Refinement

no code implementations15 Mar 2019 Mai Bui, Christoph Baur, Nassir Navab, Slobodan Ilic, Shadi Albarqouni

Despite recent advances on the topic of direct camera pose regression using neural networks, accurately estimating the camera pose of a single RGB image still remains a challenging task.

Pose Estimation regression

End-to-End Learning-Based Ultrasound Reconstruction

no code implementations9 Apr 2019 Walter Simson, Rüdiger Göbl, Magdalini Paschali, Markus Krönke, Klemens Scheidhauer, Wolfgang Weber, Nassir Navab

The proposed method displays both promising image reconstruction quality and acquisition frequency when integrated for live ultrasound scanning.

Image Reconstruction

Weakly-Supervised White and Grey Matter Segmentation in 3D Brain Ultrasound

no code implementations10 Apr 2019 Beatrice Demiray, Julia Rackerseder, Stevica Bozhinoski, Nassir Navab

We implement label transfer from MRI to US, which is prone to a residual but inevitable registration error.

Transfer Learning

Collaboration Analysis Using Deep Learning

no code implementations17 Apr 2019 Zhang Guo, Kevin Yu, Rebecca Pearlman, Nassir Navab, Roghayeh Barmaki

The analysis of the collaborative learning process is one of the growing fields of education research, which has many different analytic solutions.

Anatomy Object Recognition

Fully Automatic Segmentation of 3D Brain Ultrasound: Learning from Coarse Annotations

no code implementations18 Apr 2019 Julia Rackerseder, Rüdiger Göbl, Nassir Navab, Christoph Hennersperger

Trained on the dataset alone, we report a Dice and Jaccard coefficient of $0. 45 \pm 0. 09$ and $0. 30 \pm 0. 07$ respectively, as well as an average distance of $0. 78 \pm 0. 36~mm$.

Segmentation

Learning Interpretable Disentangled Representations using Adversarial VAEs

no code implementations17 Apr 2019 Mhd Hasan Sarhan, Abouzar Eslami, Nassir Navab, Shadi Albarqouni

Learning Interpretable representation in medical applications is becoming essential for adopting data-driven models into clinical practice.

Clustering Disentanglement +1

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