Search Results for author: Christoph H. Lampert

Found 54 papers, 18 papers with code

Can LLMs Separate Instructions From Data? And What Do We Even Mean By That?

1 code implementation11 Mar 2024 Egor Zverev, Sahar Abdelnabi, Mario Fritz, Christoph H. Lampert

Instruction-tuned Large Language Models (LLMs) have achieved breakthrough results, opening countless new possibilities for many practical applications.

ELSA: Partial Weight Freezing for Overhead-Free Sparse Network Deployment

no code implementations11 Dec 2023 Paniz Halvachi, Alexandra Peste, Dan Alistarh, Christoph H. Lampert

We present ELSA, a practical solution for creating deep networks that can easily be deployed at different levels of sparsity.

1-Lipschitz Layers Compared: Memory, Speed, and Certifiable Robustness

1 code implementation28 Nov 2023 Bernd Prach, Fabio Brau, Giorgio Buttazzo, Christoph H. Lampert

The robustness of neural networks against input perturbations with bounded magnitude represents a serious concern in the deployment of deep learning models in safety-critical systems.

1-Lipschitz Neural Networks are more expressive with N-Activations

1 code implementation10 Nov 2023 Bernd Prach, Christoph H. Lampert

A crucial property for achieving secure, trustworthy and interpretable deep learning systems is their robustness: small changes to a system's inputs should not result in large changes to its outputs.

PeFLL: Personalized Federated Learning by Learning to Learn

no code implementations8 Jun 2023 Jonathan Scott, Hossein Zakerinia, Christoph H. Lampert

We present PeFLL, a new personalized federated learning algorithm that improves over the state-of-the-art in three aspects: 1) it produces more accurate models, especially in the low-data regime, and not only for clients present during its training phase, but also for any that may emerge in the future; 2) it reduces the amount of on-client computation and client-server communication by providing future clients with ready-to-use personalized models that require no additional finetuning or optimization; 3) it comes with theoretical guarantees that establish generalization from the observed clients to future ones.

Personalized Federated Learning

Geolocation Predicting of Tweets Using BERT-Based Models

1 code implementation14 Mar 2023 Kateryna Lutsai, Christoph H. Lampert

This research is aimed to solve the tweet/user geolocation prediction task and provide a flexible methodology for the geotagging of textual big data.

Generalization In Multi-Objective Machine Learning

no code implementations29 Aug 2022 Peter Súkeník, Christoph H. Lampert

Modern machine learning tasks often require considering not just one but multiple objectives.

Fairness Generalization Bounds +1

Almost-Orthogonal Layers for Efficient General-Purpose Lipschitz Networks

1 code implementation5 Aug 2022 Bernd Prach, Christoph H. Lampert

In this work, we propose a new technique for constructing such Lipschitz networks that has a number of desirable properties: it can be applied to any linear network layer (fully-connected or convolutional), it provides formal guarantees on the Lipschitz constant, it is easy to implement and efficient to run, and it can be combined with any training objective and optimization method.

Image Classification

CrAM: A Compression-Aware Minimizer

1 code implementation28 Jul 2022 Alexandra Peste, Adrian Vladu, Eldar Kurtic, Christoph H. Lampert, Dan Alistarh

In this work we propose a new compression-aware minimizer dubbed CrAM that modifies the optimization step in a principled way, in order to produce models whose local loss behavior is stable under compression operations such as pruning.

Image Classification Language Modelling +2

Lightweight Conditional Model Extrapolation for Streaming Data under Class-Prior Shift

1 code implementation10 Jun 2022 Paulina Tomaszewska, Christoph H. Lampert

We introduce LIMES, a new method for learning with non-stationary streaming data, inspired by the recent success of meta-learning.

Meta-Learning Multi-class Classification

SSSE: Efficiently Erasing Samples from Trained Machine Learning Models

no code implementations8 Jul 2021 Alexandra Peste, Dan Alistarh, Christoph H. Lampert

The availability of large amounts of user-provided data has been key to the success of machine learning for many real-world tasks.

BIG-bench Machine Learning

FLEA: Provably Robust Fair Multisource Learning from Unreliable Training Data

1 code implementation22 Jun 2021 Eugenia Iofinova, Nikola Konstantinov, Christoph H. Lampert

In this work we address the problem of fair learning from unreliable training data in the robust multisource setting, where the available training data comes from multiple sources, a fraction of which might not be representative of the true data distribution.

Fairness

Towards Understanding Knowledge Distillation

no code implementations27 May 2021 Mary Phuong, Christoph H. Lampert

Knowledge distillation, i. e., one classifier being trained on the outputs of another classifier, is an empirically very successful technique for knowledge transfer between classifiers.

Knowledge Distillation Transfer Learning

Fairness Through Regularization for Learning to Rank

no code implementations11 Feb 2021 Nikola Konstantinov, Christoph H. Lampert

Given the abundance of applications of ranking in recent years, addressing fairness concerns around automated ranking systems becomes necessary for increasing the trust among end-users.

Binary Classification Fairness +1

Fairness-Aware PAC Learning from Corrupted Data

no code implementations11 Feb 2021 Nikola Konstantinov, Christoph H. Lampert

Addressing fairness concerns about machine learning models is a crucial step towards their long-term adoption in real-world automated systems.

Fairness PAC learning

A Flexible Selection Scheme for Minimum-Effort Transfer Learning

no code implementations27 Aug 2020 Amelie Royer, Christoph H. Lampert

Fine-tuning is a popular way of exploiting knowledge contained in a pre-trained convolutional network for a new visual recognition task.

Transfer Learning

Functional vs. parametric equivalence of ReLU networks

no code implementations ICLR 2020 Mary Phuong, Christoph H. Lampert

We address the following question: How redundant is the parameterisation of ReLU networks?

Localizing Grouped Instances for Efficient Detection in Low-Resource Scenarios

1 code implementation27 Apr 2020 Amelie Royer, Christoph H. Lampert

State-of-the-art detection systems are generally evaluated on their ability to exhaustively retrieve objects densely distributed in the image, across a wide variety of appearances and semantic categories.

object-detection Object Detection

Leveraging 2D Data to Learn Textured 3D Mesh Generation

1 code implementation CVPR 2020 Paul Henderson, Vagia Tsiminaki, Christoph H. Lampert

Thus, it learns to generate meshes that when rendered, produce images similar to those in its training set.

Physical Intuition

On the Sample Complexity of Adversarial Multi-Source PAC Learning

no code implementations ICML 2020 Nikola Konstantinov, Elias Frantar, Dan Alistarh, Christoph H. Lampert

We study the problem of learning from multiple untrusted data sources, a scenario of increasing practical relevance given the recent emergence of crowdsourcing and collaborative learning paradigms.

PAC learning

Back to square one: probabilistic trajectory forecasting without bells and whistles

no code implementations7 Dec 2018 Ehsan Pajouheshgar, Christoph H. Lampert

We introduce a spatio-temporal convolutional neural network model for trajectory forecasting from visual sources.

Relation Trajectory Forecasting

Detecting Visual Relationships Using Box Attention

no code implementations5 Jul 2018 Alexander Kolesnikov, Alina Kuznetsova, Christoph H. Lampert, Vittorio Ferrari

We propose a new model for detecting visual relationships, such as "person riding motorcycle" or "bottle on table".

object-detection Object Detection

KS(conf ): A Light-Weight Test if a ConvNet Operates Outside of Its Specifications

1 code implementation11 Apr 2018 Rémy Sun, Christoph H. Lampert

Computer vision systems for automatic image categorization have become accurate and reliable enough that they can run continuously for days or even years as components of real-world commercial applications.

Image Categorization

Zero-Shot Learning -- A Comprehensive Evaluation of the Good, the Bad and the Ugly

9 code implementations3 Jul 2017 Yongqin Xian, Christoph H. Lampert, Bernt Schiele, Zeynep Akata

Due to the importance of zero-shot learning, i. e. classifying images where there is a lack of labeled training data, the number of proposed approaches has recently increased steadily.

Zero-Shot Learning

Probabilistic Image Colorization

1 code implementation11 May 2017 Amelie Royer, Alexander Kolesnikov, Christoph H. Lampert

We develop a probabilistic technique for colorizing grayscale natural images.

Colorization Image Colorization

Data-Dependent Stability of Stochastic Gradient Descent

no code implementations ICML 2018 Ilja Kuzborskij, Christoph H. Lampert

We establish a data-dependent notion of algorithmic stability for Stochastic Gradient Descent (SGD), and employ it to develop novel generalization bounds.

Generalization Bounds

PixelCNN Models with Auxiliary Variables for Natural Image Modeling

no code implementations ICML 2017 Alexander Kolesnikov, Christoph H. Lampert

We study probabilistic models of natural images and extend the autoregressive family of PixelCNN architectures by incorporating auxiliary variables.

Ranked #13 on Image Generation on ImageNet 64x64 (Bits per dim metric)

Image Generation

iCaRL: Incremental Classifier and Representation Learning

9 code implementations CVPR 2017 Sylvestre-Alvise Rebuffi, Alexander Kolesnikov, Georg Sperl, Christoph H. Lampert

A major open problem on the road to artificial intelligence is the development of incrementally learning systems that learn about more and more concepts over time from a stream of data.

Class Incremental Learning Incremental Learning +1

Extrapolation and learning equations

1 code implementation10 Oct 2016 Georg Martius, Christoph H. Lampert

In classical machine learning, regression is treated as a black box process of identifying a suitable function from a hypothesis set without attempting to gain insight into the mechanism connecting inputs and outputs.

Improving Weakly-Supervised Object Localization By Micro-Annotation

no code implementations18 May 2016 Alexander Kolesnikov, Christoph H. Lampert

Weakly-supervised object localization methods tend to fail for object classes that consistently co-occur with the same background elements, e. g. trains on tracks.

Object Semantic Segmentation +1

Seed, Expand and Constrain: Three Principles for Weakly-Supervised Image Segmentation

2 code implementations19 Mar 2016 Alexander Kolesnikov, Christoph H. Lampert

We introduce a new loss function for the weakly-supervised training of semantic image segmentation models based on three guiding principles: to seed with weak localization cues, to expand objects based on the information about which classes can occur in an image, and to constrain the segmentations to coincide with object boundaries.

Image Segmentation Segmentation +1

Multi-Task Learning with Labeled and Unlabeled Tasks

no code implementations ICML 2017 Anastasia Pentina, Christoph H. Lampert

In contrast to previous work, which required that annotated training data is available for all tasks, we consider a new setting, in which for some tasks, potentially most of them, only unlabeled training data is provided.

Multi-Task Learning

Lifelong Learning with Non-i.i.d. Tasks

no code implementations NeurIPS 2015 Anastasia Pentina, Christoph H. Lampert

In the first case we prove a PAC-Bayesian theorem, which can be seen as a direct generalization of the analogous previous result for the i. i. d.

Inductive Bias

Conditional Risk Minimization for Stochastic Processes

no code implementations9 Oct 2015 Alexander Zimin, Christoph H. Lampert

In particular, we aim at learning predictors that minimize the conditional risk for a stochastic process, i. e. the expected loss of the predictor on the next point conditioned on the set of training samples observed so far.

Time Series Time Series Prediction

Classifier Adaptation at Prediction Time

no code implementations CVPR 2015 Amelie Royer, Christoph H. Lampert

Experiments on the ILSVRC2010 and ILSVRC2012 datasets show that adapting object classification systems at prediction time can significantly reduce their error rate, even with no additional human feedback.

Object Categorization

Identifying Reliable Annotations for Large Scale Image Segmentation

no code implementations28 Apr 2015 Alexander Kolesnikov, Christoph H. Lampert

In this work, we present a Gaussian process (GP) based technique for simultaneously identifying which images of a training set have unreliable annotation and learning a segmentation model in which the negative effect of these images is suppressed.

Image Segmentation Segmentation +1

Curriculum Learning of Multiple Tasks

no code implementations CVPR 2015 Anastasia Pentina, Viktoriia Sharmanska, Christoph H. Lampert

Sharing information between multiple tasks enables algorithms to achieve good generalization performance even from small amounts of training data.

Multi-Task Learning

Learning to Transfer Privileged Information

no code implementations1 Oct 2014 Viktoriia Sharmanska, Novi Quadrianto, Christoph H. Lampert

We interpret these methods as learning easiness and hardness of the objects in the privileged space and then transferring this knowledge to train a better classifier in the original space.

General Classification

A Multi-Plane Block-Coordinate Frank-Wolfe Algorithm for Training Structural SVMs with a Costly max-Oracle

no code implementations CVPR 2015 Neel Shah, Vladimir Kolmogorov, Christoph H. Lampert

Structural support vector machines (SSVMs) are amongst the best performing models for structured computer vision tasks, such as semantic image segmentation or human pose estimation.

Image Segmentation Pose Estimation +2

Mind the Nuisance: Gaussian Process Classification using Privileged Noise

no code implementations NeurIPS 2014 Daniel Hernández-Lobato, Viktoriia Sharmanska, Kristian Kersting, Christoph H. Lampert, Novi Quadrianto

That is, in contrast to the standard GPC setting, the latent function is not just a nuisance but a feature: it becomes a natural measure of confidence about the training data by modulating the slope of the GPC sigmoid likelihood function.

Classification General Classification

Predicting the Future Behavior of a Time-Varying Probability Distribution

no code implementations CVPR 2015 Christoph H. Lampert

Our main contribution is a method for predicting the next step of the time-varying distribution from a given sequence of sample sets from earlier time steps.

Domain Adaptation

Deep Fisher Kernels - End to End Learning of the Fisher Kernel GMM Parameters

no code implementations CVPR 2014 Vladyslav Sydorov, Mayu Sakurada, Christoph H. Lampert

Fisher Kernels and Deep Learning were two developments with significant impact on large-scale object categorization in the last years.

Learning Theory Object Categorization

Closed-Form Training of Conditional Random Fields for Large Scale Image Segmentation

no code implementations27 Mar 2014 Alexander Kolesnikov, Matthieu Guillaumin, Vittorio Ferrari, Christoph H. Lampert

It is inspired by existing closed-form expressions for the maximum likelihood parameters of a generative graphical model with tree topology.

Image Segmentation Segmentation +1

A PAC-Bayesian bound for Lifelong Learning

no code implementations12 Nov 2013 Anastasia Pentina, Christoph H. Lampert

Transfer learning has received a lot of attention in the machine learning community over the last years, and several effective algorithms have been developed.

Transfer Learning

Attribute-Based Classification for Zero-Shot Visual Object Categorization

no code implementations IEEE Transactions on Pattern Analysis and Machine Intelligence 2013 Christoph H. Lampert, Hannes Nickisch, Stefan Harmeling

To tackle the problem, we introduce attribute-based classification: Objects are identified based on a high-level description that is phrased in terms of semantic attributes, such as the object’s color or shape.

Attribute Classification +4

Dynamic Pruning of Factor Graphs for Maximum Marginal Prediction

no code implementations NeurIPS 2012 Christoph H. Lampert

MMP is typically performed as a two-stage procedure: one estimates each variable's marginal probability and then forms a prediction from the states of maximal probability.

Image Inpainting Multi-Label Classification

Maximum Margin Multi-Label Structured Prediction

no code implementations NeurIPS 2011 Christoph H. Lampert

We study multi-label prediction for structured output spaces, a problem that occurs, for example, in object detection in images, secondary structure prediction in computational biology, and graph matching with symmetries.

Generalization Bounds Graph Matching +4

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