Search Results for author: Christoph Lippert

Found 21 papers, 10 papers with code

MixerFlow for Image Modelling

no code implementations25 Oct 2023 Eshant English, Matthias Kirchler, Christoph Lippert

Normalising flows are statistical models that transform a complex density into a simpler density through the use of bijective transformations enabling both density estimation and data generation from a single model.

Density Estimation Normalising Flows

A Probabilistic Approach to Self-Supervised Learning using Cyclical Stochastic Gradient MCMC

no code implementations2 Aug 2023 Masoumeh Javanbakhat, Christoph Lippert

Within this framework, we place a prior over the parameters of a self-supervised learning model and use cSGHMC to approximate the high dimensional and multimodal posterior distribution over the embeddings.

Out-of-Distribution Detection Self-Supervised Learning

Kernelised Normalising Flows

no code implementations27 Jul 2023 Eshant English, Matthias Kirchler, Christoph Lippert

Normalising Flows are non-parametric statistical models characterised by their dual capabilities of density estimation and generation.

Density Estimation Normalising Flows

DCID: Deep Canonical Information Decomposition

1 code implementation27 Jun 2023 Alexander Rakowski, Christoph Lippert

Canonical Correlation Analysis (CCA)-based methods have traditionally been used to identify shared variables, however, they were designed for multivariate targets and only offer trivial solutions for univariate cases.

Information Retrieval Multi-Task Learning

Iterative Patch Selection for High-Resolution Image Recognition

1 code implementation24 Oct 2022 Benjamin Bergner, Christoph Lippert, Aravindh Mahendran

We propose a simple method, Iterative Patch Selection (IPS), which decouples the memory usage from the input size and thus enables the processing of arbitrarily large images under tight hardware constraints.

Autonomous Driving Multiple Instance Learning +2

Training Normalizing Flows from Dependent Data

1 code implementation29 Sep 2022 Matthias Kirchler, Christoph Lippert, Marius Kloft

Normalizing flows are powerful non-parametric statistical models that function as a hybrid between density estimators and generative models.

Density Estimation

Less Is More: A Comparison of Active Learning Strategies for 3D Medical Image Segmentation

1 code implementation2 Jul 2022 Josafat-Mattias Burmeister, Marcel Fernandez Rosas, Johannes Hagemann, Jonas Kordt, Jasper Blum, Simon Shabo, Benjamin Bergner, Christoph Lippert

Since labeling medical image data is a costly and labor-intensive process, active learning has gained much popularity in the medical image segmentation domain in recent years.

Active Learning Benchmarking +4

Interpretable and Interactive Deep Multiple Instance Learning for Dental Caries Classification in Bitewing X-rays

1 code implementation17 Dec 2021 Benjamin Bergner, Csaba Rohrer, Aiham Taleb, Martha Duchrau, Guilherme De Leon, Jonas Almeida Rodrigues, Falk Schwendicke, Joachim Krois, Christoph Lippert

We propose a simple and efficient image classification architecture based on deep multiple instance learning, and apply it to the challenging task of caries detection in dental radiographs.

Classification Image Classification +2

ContIG: Self-supervised Multimodal Contrastive Learning for Medical Imaging with Genetics

1 code implementation CVPR 2022 Aiham Taleb, Matthias Kirchler, Remo Monti, Christoph Lippert

High annotation costs are a substantial bottleneck in applying modern deep learning architectures to clinically relevant medical use cases, substantiating the need for novel algorithms to learn from unlabeled data.

Contrastive Learning

Self-Supervised Learning for 3D Medical Image Analysis using 3D SimCLR and Monte Carlo Dropout

no code implementations29 Sep 2021 Yamen Ali, Aiham Taleb, Marina M. -C. Höhne, Christoph Lippert

Self-supervised learning methods can be used to learn meaningful representations from unlabeled data that can be transferred to supervised downstream tasks to reduce the need for labeled data.

Brain Tumor Segmentation Segmentation +2

Explainability Requires Interactivity

2 code implementations16 Sep 2021 Matthias Kirchler, Martin Graf, Marius Kloft, Christoph Lippert

When explaining the decisions of deep neural networks, simple stories are tempting but dangerous.

Multimodal Self-Supervised Learning for Medical Image Analysis

no code implementations11 Dec 2019 Aiham Taleb, Christoph Lippert, Tassilo Klein, Moin Nabi

We introduce the multimodal puzzle task, which facilitates rich representation learning from multiple image modalities.

Brain Tumor Segmentation Data Augmentation +5

Two-sample Testing Using Deep Learning

1 code implementation14 Oct 2019 Matthias Kirchler, Shahryar Khorasani, Marius Kloft, Christoph Lippert

We propose a two-sample testing procedure based on learned deep neural network representations.

Transfer Learning Two-sample testing +1

Integrating omics and MRI data with kernel-based tests and CNNs to identify rare genetic markers for Alzheimer's disease

no code implementations2 Dec 2018 Stefan Konigorski, Shahryar Khorasani, Christoph Lippert

The results indicate that CNNs provide a fast, scalable and precise tool to derive quantitative AD traits and that new kernels integrating domain knowledge can yield higher power in association tests of very rare variants.

Sparse Probit Linear Mixed Model

no code implementations16 Jul 2015 Stephan Mandt, Florian Wenzel, Shinichi Nakajima, John P. Cunningham, Christoph Lippert, Marius Kloft

Formulated as models for linear regression, LMMs have been restricted to continuous phenotypes.

feature selection

A powerful and efficient set test for genetic markers that handles confounders

no code implementations3 May 2012 Jennifer Listgarten, Christoph Lippert, Eun Yong Kang, Jing Xiang, Carl M. Kadie, David Heckerman

Until now, these approaches did not address confounding by family relatedness and population structure, a problem that is becoming more important as larger data sets are used to increase power.

Two-sample testing

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