Search Results for author: Olaf Hellwich

Found 10 papers, 4 papers with code

Multi-Task Multi-Modal Self-Supervised Learning for Facial Expression Recognition

1 code implementation16 Apr 2024 Marah Halawa, Florian Blume, Pia Bideau, Martin Maier, Rasha Abdel Rahman, Olaf Hellwich

To that end, we examine the performance of learning through different combinations of self-supervised tasks on the facial expression recognition downstream task.

 Ranked #1 on Emotion Recognition in Conversation on MELD (Weighted Accuracy metric)

Emotion Classification Emotion Recognition in Conversation +2

Decomposer: Semi-supervised Learning of Image Restoration and Image Decomposition

no code implementations28 Nov 2023 Boris Meinardus, Mariusz Trzeciakiewicz, Tim Herzig, Monika Kwiatkowski, Simon Matern, Olaf Hellwich

We present Decomposer, a semi-supervised reconstruction model that decomposes distorted image sequences into their fundamental building blocks - the original image and the applied augmentations, i. e., shadow, light, and occlusions.

Image Restoration

DIAR: Deep Image Alignment and Reconstruction using Swin Transformers

no code implementations17 Oct 2023 Monika Kwiatkowski, Simon Matern, Olaf Hellwich

When taking images of some occluded content, one is often faced with the problem that every individual image frame contains unwanted artifacts, but a collection of images contains all relevant information if properly aligned and aggregated.

SIDAR: Synthetic Image Dataset for Alignment & Restoration

1 code implementation19 May 2023 Monika Kwiatkowski, Simon Matern, Olaf Hellwich

Our data generation pipeline is customizable and can be applied to any existing dataset, serving as a data augmentation to further improve the feature learning of any existing method.

Data Augmentation Denoising +4

Image-based Detection of Surface Defects in Concrete during Construction

1 code implementation3 Aug 2022 Dominik Kuhnke, Monika Kwiatkowski, Olaf Hellwich

Our experiments demonstrate that both approaches are suitable for solving and automating honeycomb detection.

Active Learning Defect Detection +2

Content-Based Landmark Retrieval Combining Global and Local Features using Siamese Neural Networks

1 code implementation3 Aug 2022 Tianyi Hu, Monika Kwiatkowski, Simon Matern, Olaf Hellwich

A Siamese network is used for global feature extraction and metric learning, which gives an initial ranking of the landmark search.

Metric Learning Re-Ranking +2

Action-based Contrastive Learning for Trajectory Prediction

no code implementations18 Jul 2022 Marah Halawa, Olaf Hellwich, Pia Bideau

To that end, we propose a novel action-based contrastive learning loss, that utilizes pedestrian action information to improve the learned trajectory embeddings.

Autonomous Driving Contrastive Learning +1

Learning Disentangled Expression Representations from Facial Images

no code implementations16 Aug 2020 Marah Halawa, Manuel Wöllhaf, Eduardo Vellasques, Urko Sánchez Sanz, Olaf Hellwich

One common strategy to tackle such a problem is to learn disentangled representations for the different factors of variation of the observed data using adversarial learning.

Iterative Bilateral Filtering of Polarimetric SAR Data

no code implementations1 Nov 2013 Olivier D'Hondt, Stéphane Guillaso, Olaf Hellwich

In this paper, we introduce an iterative speckle filtering method for polarimetric SAR (PolSAR) images based on the bilateral filter.

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