Search Results for author: Nassir Navab

Found 365 papers, 117 papers with code

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

Multiple human pose estimation with temporally consistent 3d pictorial structures

no code implementations6 Sep 2014 Vasileios Belagiannis, Xinchao Wang, Bernt Schiele, Pascal Fua, Slobodan Ilic, Nassir Navab

To address these challenges, we propose a temporally consistent 3D Pictorial Structures model (3DPS) for multiple human pose estimation from multiple camera views.

3D Multi-Person Pose Estimation 3D Pose Estimation

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

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

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

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

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

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

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.

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

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.

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.

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).

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 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

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

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

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

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

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

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

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

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

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.

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

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

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

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

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.

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

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

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

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

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

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

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

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.

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.

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

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

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

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.

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

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

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

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

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

Multi-scale Microaneurysms Segmentation Using Embedding Triplet Loss

no code implementations18 Apr 2019 Mhd Hasan Sarhan, Shadi Albarqouni, Mehmet Yigitsoy, Nassir Navab, Abouzar Eslami

To enhance the discriminative power of the classification model, we incorporate triplet embedding loss with a selective sampling routine.

Classification Diabetic Retinopathy Detection +2

Multi-modal Graph Fusion for Inductive Disease Classification in Incomplete Datasets

no code implementations8 May 2019 Gerome Vivar, Hendrik Burwinkel, Anees Kazi, Andreas Zwergal, Nassir Navab, Seyed-Ahmad Ahmadi

Recently, several works proposed geometric deep learning approaches to solve disease classification, by modeling patients as nodes in a graph, along with graph signal processing of multi-modal features.

Classification Decision Making +1

Adaptive Image-Feature Learning for Disease Classification Using Inductive Graph Networks

no code implementations8 May 2019 Hendrik Burwinkel, Anees Kazi, Gerome Vivar, Shadi Albarqouni, Guillaume Zahnd, Nassir Navab, Seyed-Ahmad Ahmadi

We propose a new network architecture that exploits an inductive end-to-end learning approach for disease classification, where filters from both the CNN and the graph are trained jointly.

Classification General Classification

Learning Interpretable Features via Adversarially Robust Optimization

no code implementations9 May 2019 Ashkan Khakzar, Shadi Albarqouni, Nassir Navab

In this work, we propose a method for improving the feature interpretability of neural network classifiers.

Decision Making

BrainTorrent: A Peer-to-Peer Environment for Decentralized Federated Learning

no code implementations16 May 2019 Abhijit Guha Roy, Shayan Siddiqui, Sebastian Pölsterl, Nassir Navab, Christian Wachinger

A disadvantage of FL is the dependence on a central server, which requires all clients to agree on one trusted central body, and whose failure would disrupt the training process of all clients.

Brain Segmentation Federated Learning

Perceptual Embedding Consistency for Seamless Reconstruction of Tilewise Style Transfer

no code implementations3 Jun 2019 Amal Lahiani, Nassir Navab, Shadi Albarqouni, Eldad Klaiman

Recent work has shown Generative Adversarial Networks(GANs) can be used to create realistic images of virtually stained slide images in digital pathology with clinically validated interpretability.

Style Transfer

`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

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

Reflective-AR Display: An Interaction Methodology for Virtual-Real Alignment in Medical Robotics

no code implementations23 Jul 2019 Javad Fotouhi, Tianyu Song, Arian Mehrfard, Giacomo Taylor, Qiaochu Wang, Fengfang Xian, Alejandro Martin-Gomez, Bernhard Fuerst, Mehran Armand, Mathias Unberath, Nassir Navab

To overcome this challenge, we introduce a novel registration concept for intuitive alignment of AR content to its physical counterpart by providing a multi-view AR experience via reflective-AR displays that simultaneously show the augmentations from multiple viewpoints.

Few-Shot Meta-Denoising

no code implementations31 Jul 2019 Leslie Casas, Attila Klimmek, Gustavo Carneiro, Nassir Navab, Vasileios Belagiannis

A solution to mitigate the small training set issue is to pre-train a denoising model with small training sets containing pairs of clean and synthesized noisy signals, produced from empirical noise priors, and fine-tune on the available small training set.

Denoising Few-Shot Learning +1

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

Object-Driven Multi-Layer Scene Decomposition From a Single Image

no code implementations ICCV 2019 Helisa Dhamo, Nassir Navab, Federico Tombari

Our approach aims at building up a Layered Depth Image (LDI) from a single RGB input, which is an efficient representation that arranges the scene in layers, including originally occluded regions.

Hallucination

ForkNet: Multi-branch Volumetric Semantic Completion from a Single Depth Image

no code implementations ICCV 2019 Yida Wang, David Joseph Tan, Nassir Navab, Federico Tombari

We propose a novel model for 3D semantic completion from a single depth image, based on a single encoder and three separate generators used to reconstruct different geometric and semantic representations of the original and completed scene, all sharing the same latent space.

Ranked #7 on 3D Semantic Scene Completion on NYUv2 (using extra training data)

3D Semantic Scene Completion Attribute

Learn to Segment Organs with a Few Bounding Boxes

no code implementations17 Sep 2019 Abhijeet Parida, Arianne Tran, Nassir Navab, Shadi Albarqouni

Semantic segmentation is an import task in the medical field to identify the exact extent and orientation of significant structures like organs and pathology.

Segmentation Semantic Segmentation

Learn to Estimate Labels Uncertainty for Quality Assurance

no code implementations17 Sep 2019 Agnieszka Tomczack, Nassir Navab, Shadi Albarqouni

Deep Learning sets the state-of-the-art in many challenging tasks showing outstanding performance in a broad range of applications.

Bayesian Inference

Learning to Avoid Poor Images: Towards Task-aware C-arm Cone-beam CT Trajectories

no code implementations19 Sep 2019 Jan-Nico Zaech, Cong Gao, Bastian Bier, Russell Taylor, Andreas Maier, Nassir Navab, Mathias Unberath

Metal artifacts in computed tomography (CT) arise from a mismatch between physics of image formation and idealized assumptions during tomographic reconstruction.

Computed Tomography (CT)

CAI4CAI: The Rise of Contextual Artificial Intelligence in Computer Assisted Interventions

no code implementations20 Oct 2019 Tom Vercauteren, Mathias Unberath, Nicolas Padoy, Nassir Navab

Data-driven computational approaches have evolved to enable extraction of information from medical images with a reliability, accuracy and speed which is already transforming their interpretation and exploitation in clinical practice.

Decision Making

Radar Emitter Classification with Attribute-specific Recurrent Neural Networks

no code implementations18 Nov 2019 Paolo Notaro, Magdalini Paschali, Carsten Hopke, David Wittmann, Nassir Navab

Radar pulse streams exhibit increasingly complex temporal patterns and can no longer rely on a purely value-based analysis of the pulse attributes for the purpose of emitter classification.

Attribute Classification +1

Signal Clustering with Class-independent Segmentation

no code implementations18 Nov 2019 Stefano Gasperini, Magdalini Paschali, Carsten Hopke, David Wittmann, Nassir Navab

Radar signals have been dramatically increasing in complexity, limiting the source separation ability of traditional approaches.

Clustering Image Segmentation +2

Improving Feature Attribution through Input-specific Network Pruning

no code implementations25 Nov 2019 Ashkan Khakzar, Soroosh Baselizadeh, Saurabh Khanduja, Christian Rupprecht, Seong Tae Kim, Nassir Navab

Attributing the output of a neural network to the contribution of given input elements is a way of shedding light on the black-box nature of neural networks.

Network Pruning

A Comparative Analysis of Virtual Reality Head-Mounted Display Systems

no code implementations5 Dec 2019 Arian Mehrfard, Javad Fotouhi, Giacomo Taylor, Tess Forster, Nassir Navab, Bernhard Fuerst

With recent advances of Virtual Reality (VR) technology, the deployment of such will dramatically increase in non-entertainment environments, such as professional education and training, manufacturing, service, or low frequency/high risk scenarios.

Understanding the effects of artifacts on automated polyp detection and incorporating that knowledge via learning without forgetting

1 code implementation7 Feb 2020 Maxime Kayser, Roger D. Soberanis-Mukul, Anna-Maria Zvereva, Peter Klare, Nassir Navab, Shadi Albarqouni

We then investigated different strategies, such as a learning without forgetting framework, to leverage artifact knowledge to improve automated polyp detection.

Object Localization

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

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.

On the Effectiveness of Virtual Reality-based Training for Robotic Setup

no code implementations3 Mar 2020 Arian Mehrfard, Javad Fotouhi, Tess Forster, Giacomo Taylor, Danyal Fer, Deborah Nagle, Nassir Navab, Bernhard Fuerst

We trained 30 participants on how to set up a robotic arm in an environment mimicking clinical setup.

Robotics

Spatiotemporal-Aware Augmented Reality: Redefining HCI in Image-Guided Therapy

no code implementations4 Mar 2020 Javad Fotouhi, Arian Mehrfard, Tianyu Song, Alex Johnson, Greg Osgood, Mathias Unberath, Mehran Armand, Nassir Navab

Suboptimal interaction with patient data and challenges in mastering 3D anatomy based on ill-posed 2D interventional images are essential concerns in image-guided therapies.

Anatomy Management

From Perspective X-ray Imaging to Parallax-Robust Orthographic Stitching

no code implementations5 Mar 2020 Javad Fotouhi, Xingtong Liu, Mehran Armand, Nassir Navab, Mathias Unberath

Stitching images acquired under perspective projective geometry is a relevant topic in computer vision with multiple applications ranging from smartphone panoramas to the construction of digital maps.

Anatomy Image Stitching

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

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

Latent-Graph Learning for Disease Prediction

no code implementations27 Mar 2020 Luca Cosmo, Anees Kazi, Seyed-Ahmad Ahmadi, Nassir Navab, Michael Bronstein

Recently, Graph Convolutional Networks (GCNs) have proven to be a powerful machine learning tool for Computer-Aided Diagnosis (CADx) and disease prediction.

Disease Prediction General Classification +1

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)

Confident Coreset for Active Learning in Medical Image Analysis

no code implementations5 Apr 2020 Seong Tae Kim, Farrukh Mushtaq, Nassir Navab

Active learning is one of the solutions to this problem where an active learner is designed to indicate which samples need to be annotated to effectively train a target model.

Active Learning

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

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

Learning 3D Semantic Scene Graphs from 3D Indoor Reconstructions

no code implementations CVPR 2020 Johanna Wald, Helisa Dhamo, Nassir Navab, Federico Tombari

In our work we focus on scene graphs, a data structure that organizes the entities of a scene in a graph, where objects are nodes and their relationships modeled as edges.

3d scene graph generation 3D Semantic Segmentation +2

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

Colonoscope tracking method based on shape estimation network

no code implementations20 Apr 2020 Masahiro Oda, Holger R. Roth, Takayuki Kitasaka, Kazuhiro Furukawa, Ryoji Miyahara, Yoshiki Hirooka, Nassir Navab, Kensaku MORI

We utilize the shape estimation network (SEN), which estimates deformed colon shape during colonoscope insertions.

Position

Colon Shape Estimation Method for Colonoscope Tracking using Recurrent Neural Networks

no code implementations20 Apr 2020 Masahiro Oda, Holger R. Roth, Takayuki Kitasaka, Kazuhiro Furukawa, Ryoji Miyahara, Yoshiki Hirooka, Hidemi Goto, Nassir Navab, Kensaku MORI

We propose a colon deformation estimation method using RNN and obtain the colonoscope shape from electromagnetic sensors during its insertion into the colon.

Explicit Domain Adaptation with Loosely Coupled Samples

no code implementations24 Apr 2020 Oliver Scheel, Loren Schwarz, Nassir Navab, Federico Tombari

In this work we propose a transfer learning framework, core of which is learning an explicit mapping between domains.

Autonomous Driving Domain Adaptation +4

Decision Support for Intoxication Prediction Using Graph Convolutional Networks

no code implementations2 May 2020 Hendrik Burwinkel, Matthias Keicher, David Bani-Harouni, Tobias Zellner, Florian Eyer, Nassir Navab, Seyed-Ahmad Ahmadi

Due to the time-sensitive nature of these cases, doctors are required to propose a correct diagnosis and intervention within a minimal time frame.

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

Efficient Ensemble Model Generation for Uncertainty Estimation with Bayesian Approximation in Segmentation

no code implementations21 May 2020 Hong Joo Lee, Seong Tae Kim, Hakmin Lee, Nassir Navab, Yong Man Ro

Experimental results show that the proposed method could provide useful uncertainty information by Bayesian approximation with the efficient ensemble model generation and improve the predictive performance.

Segmentation

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.

Augment Yourself: Mixed Reality Self-Augmentation Using Optical See-through Head-mounted Displays and Physical Mirrors

no code implementations6 Jul 2020 Mathias Unberath, Kevin Yu, Roghayeh Barmaki, Alex Johnson, Nassir Navab

Consequently, most MR applications that are centered around the user, such as virtual dressing rooms or learning of body movements, cannot be realized with HMDs.

Anatomy Mixed Reality

Searching for Efficient Architecture for Instrument Segmentation in Robotic Surgery

no code implementations8 Jul 2020 Daniil Pakhomov, Nassir Navab

To account for reduced accuracy of the discovered light-weight deep residual network and avoid adding any additional computational burden, we perform a differentiable search over dilation rates for residual units of our network.

Pose Estimation Segmentation

Towards Unsupervised Learning for Instrument Segmentation in Robotic Surgery with Cycle-Consistent Adversarial Networks

no code implementations9 Jul 2020 Daniil Pakhomov, Wei Shen, Nassir Navab

Surgical tool segmentation in endoscopic images is an important problem: it is a crucial step towards full instrument pose estimation and it is used for integration of pre- and intra-operative images into the endoscopic view.

Image Segmentation Image-to-Image Translation +3

DynaMiTe: A Dynamic Local Motion Model with Temporal Constraints for Robust Real-Time Feature Matching

no code implementations31 Jul 2020 Patrick Ruhkamp, Ruiqi Gong, Nassir Navab, Benjamin Busam

Feature based visual odometry and SLAM methods require accurate and fast correspondence matching between consecutive image frames for precise camera pose estimation in real-time.

Descriptive Pose Estimation +1

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

Continual Class Incremental Learning for CT Thoracic Segmentation

no code implementations12 Aug 2020 Abdelrahman Elskhawy, Aneta Lisowska, Matthias Keicher, Josep Henry, Paul Thomson, Nassir Navab

In this work, we evaluate FT and LwF for class incremental learning in multi-organ segmentation using the publicly available AAPM dataset.

Class Incremental Learning Incremental Learning +2

A Learning-based Method for Online Adjustment of C-arm Cone-Beam CT Source Trajectories for Artifact Avoidance

no code implementations14 Aug 2020 Mareike Thies, Jan-Nico Zäch, Cong Gao, Russell Taylor, Nassir Navab, Andreas Maier, Mathias Unberath

We propose to adjust the C-arm CBCT source trajectory during the scan to optimize reconstruction quality with respect to a certain task, i. e. verification of screw placement.

Anatomy Tomographic Reconstructions

Inverse Distance Aggregation for Federated Learning with Non-IID Data

no code implementations17 Aug 2020 Yousef Yeganeh, Azade Farshad, Nassir Navab, Shadi Albarqouni

Federated learning (FL) has been a promising approach in the field of medical imaging in recent years.

Federated Learning

Polyp-artifact relationship analysis using graph inductive learned representations

no code implementations15 Sep 2020 Roger D. Soberanis-Mukul, Shadi Albarqouni, Nassir Navab

In inference, we use this classifier to analyze a second graph, generated from artifact and polyp predictions given by region proposal networks.

Graph Representation Learning Object Localization +1

I Like to Move It: 6D Pose Estimation as an Action Decision Process

no code implementations26 Sep 2020 Benjamin Busam, Hyun Jun Jung, Nassir Navab

We change this paradigm and reformulate the problem as an action decision process where an initial pose is updated in incremental discrete steps that sequentially move a virtual 3D rendering towards the correct solution.

6D Pose Estimation Object +3

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

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

Panoster: End-to-end Panoptic Segmentation of LiDAR Point Clouds

no code implementations28 Oct 2020 Stefano Gasperini, Mohammad-Ali Nikouei Mahani, Alvaro Marcos-Ramiro, Nassir Navab, Federico Tombari

Panoptic segmentation has recently unified semantic and instance segmentation, previously addressed separately, thus taking a step further towards creating more comprehensive and efficient perception systems.

Clustering Instance Segmentation +2

Self-Supervised Out-of-Distribution Detection in Brain CT Scans

no code implementations10 Nov 2020 Abinav Ravi Venkatakrishnan, Seong Tae Kim, Rami Eisawy, Franz Pfister, Nassir Navab

To address these issues, recently, unsupervised deep anomaly detection methods that train the model on large-sized normal scans and detect abnormal scans by calculating reconstruction error have been reported.

Anomaly Detection Out-of-Distribution Detection +1

Rethinking Positive Aggregation and Propagation of Gradients in Gradient-based Saliency Methods

no code implementations1 Dec 2020 Ashkan Khakzar, Soroosh Baselizadeh, Nassir Navab

In this work, we empirically show that two approaches for handling the gradient information, namely positive aggregation, and positive propagation, break these methods.

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

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

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

OperA: Attention-Regularized Transformers for Surgical Phase Recognition

no code implementations5 Mar 2021 Tobias Czempiel, Magdalini Paschali, Daniel Ostler, Seong Tae Kim, Benjamin Busam, Nassir Navab

In this paper we introduce OperA, a transformer-based model that accurately predicts surgical phases from long video sequences.

Surgical phase recognition

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

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