Search Results for author: Ralph Ewerth

Found 48 papers, 32 papers with code

On the Influence of Reading Sequences on Knowledge Gain during Web Search

1 code implementation10 Jan 2024 Wolfgang Gritz, Anett Hoppe, Ralph Ewerth

We use publicly available study data from a web-based learning task to examine the relationship between our feature set and the participants' test scores.

Classification of Visualization Types and Perspectives in Patents

1 code implementation19 Jul 2023 Junaid Ahmed Ghauri, Eric Müller-Budack, Ralph Ewerth

In this paper, we adopt state-of-the-art deep learning methods for the classification of visualization types and perspectives in patent images.

Classification Retrieval

Improving Generalization for Multimodal Fake News Detection

1 code implementation29 May 2023 Sahar Tahmasebi, Sherzod Hakimov, Ralph Ewerth, Eric Müller-Budack

To reduce the bias and improve model generalization, we suggest training data augmentation to conduct more meaningful experiments for fake news detection on social media.

Data Augmentation Fake News Detection +1

Predicting Knowledge Gain for MOOC Video Consumption

1 code implementation13 Dec 2022 Christian Otto, Markos Stamatakis, Anett Hoppe, Ralph Ewerth

Informal learning on the Web using search engines as well as more structured learning on MOOC platforms have become very popular in recent years.

Feature Importance Retrieval

MM-Locate-News: Multimodal Focus Location Estimation in News

1 code implementation15 Nov 2022 Golsa Tahmasebzadeh, Eric Müller-Budack, Sherzod Hakimov, Ralph Ewerth

In this paper, a novel dataset called Multimodal Focus Location of News (MM-Locate-News) is introduced.

News Retrieval Retrieval

SoccerNet 2022 Challenges Results

7 code implementations5 Oct 2022 Silvio Giancola, Anthony Cioppa, Adrien Deliège, Floriane Magera, Vladimir Somers, Le Kang, Xin Zhou, Olivier Barnich, Christophe De Vleeschouwer, Alexandre Alahi, Bernard Ghanem, Marc Van Droogenbroeck, Abdulrahman Darwish, Adrien Maglo, Albert Clapés, Andreas Luyts, Andrei Boiarov, Artur Xarles, Astrid Orcesi, Avijit Shah, Baoyu Fan, Bharath Comandur, Chen Chen, Chen Zhang, Chen Zhao, Chengzhi Lin, Cheuk-Yiu Chan, Chun Chuen Hui, Dengjie Li, Fan Yang, Fan Liang, Fang Da, Feng Yan, Fufu Yu, Guanshuo Wang, H. Anthony Chan, He Zhu, Hongwei Kan, Jiaming Chu, Jianming Hu, Jianyang Gu, Jin Chen, João V. B. Soares, Jonas Theiner, Jorge De Corte, José Henrique Brito, Jun Zhang, Junjie Li, Junwei Liang, Leqi Shen, Lin Ma, Lingchi Chen, Miguel Santos Marques, Mike Azatov, Nikita Kasatkin, Ning Wang, Qiong Jia, Quoc Cuong Pham, Ralph Ewerth, Ran Song, RenGang Li, Rikke Gade, Ruben Debien, Runze Zhang, Sangrok Lee, Sergio Escalera, Shan Jiang, Shigeyuki Odashima, Shimin Chen, Shoichi Masui, Shouhong Ding, Sin-wai Chan, Siyu Chen, Tallal El-Shabrawy, Tao He, Thomas B. Moeslund, Wan-Chi Siu, Wei zhang, Wei Li, Xiangwei Wang, Xiao Tan, Xiaochuan Li, Xiaolin Wei, Xiaoqing Ye, Xing Liu, Xinying Wang, Yandong Guo, YaQian Zhao, Yi Yu, YingYing Li, Yue He, Yujie Zhong, Zhenhua Guo, Zhiheng Li

The SoccerNet 2022 challenges were the second annual video understanding challenges organized by the SoccerNet team.

Action Spotting Camera Calibration +3

TVCalib: Camera Calibration for Sports Field Registration in Soccer

1 code implementation24 Jul 2022 Jonas Theiner, Ralph Ewerth

Sports field registration in broadcast videos is typically interpreted as the task of homography estimation, which provides a mapping between a planar field and the corresponding visible area of the image.

Camera Calibration Homography Estimation

Semi-supervised Human Pose Estimation in Art-historical Images

1 code implementation6 Jul 2022 Matthias Springstein, Stefanie Schneider, Christian Althaus, Ralph Ewerth

In contrast to previous work that attempts to bridge the domain gap with pre-trained models or through style transfer, we suggest semi-supervised learning for both object and keypoint detection.

Keypoint Detection Retrieval +2

TIB-VA at SemEval-2022 Task 5: A Multimodal Architecture for the Detection and Classification of Misogynous Memes

1 code implementation SemEval (NAACL) 2022 Sherzod Hakimov, Gullal S. Cheema, Ralph Ewerth

The detection of offensive, hateful content on social media is a challenging problem that affects many online users on a daily basis.

Combining Textual Features for the Detection of Hateful and Offensive Language

1 code implementation9 Dec 2021 Sherzod Hakimov, Ralph Ewerth

The detection of offensive, hateful and profane language has become a critical challenge since many users in social networks are exposed to cyberbullying activities on a daily basis.

Word Embeddings

Extraction of Positional Player Data from Broadcast Soccer Videos

no code implementations21 Oct 2021 Jonas Theiner, Wolfgang Gritz, Eric Müller-Budack, Robert Rein, Daniel Memmert, Ralph Ewerth

A comprehensive experimental evaluation is presented for the individual modules as well as the entire pipeline to identify the influence of errors to subsequent modules and the overall result.

A Unified Taxonomy and Multimodal Dataset for Events in Invasion Games

1 code implementation25 Aug 2021 Henrik Biermann, Jonas Theiner, Manuel Bassek, Dominik Raabe, Daniel Memmert, Ralph Ewerth

To address these issues, we present (1) a universal taxonomy that covers a wide range of low and high-level events for invasion games and is exemplarily refined to soccer and handball, and (2) release two multi-modal datasets comprising video and positional data with gold-standard annotations to foster research in fine-grained and ball-centered event spotting.

Benchmarking Video Classification

Evaluation of Automated Image Descriptions for Visually Impaired Students

no code implementations29 Jun 2021 Anett Hoppe, David Morris, Ralph Ewerth

Illustrations are widely used in education, and sometimes, alternatives are not available for visually impaired students.

A Fair and Comprehensive Comparison of Multimodal Tweet Sentiment Analysis Methods

1 code implementation16 Jun 2021 Gullal S. Cheema, Sherzod Hakimov, Eric Müller-Budack, Ralph Ewerth

Opinion and sentiment analysis is a vital task to characterize subjective information in social media posts.

Sentiment Analysis

Predicting Knowledge Gain during Web Search based on Multimedia Resource Consumption

no code implementations11 Jun 2021 Christian Otto, Ran Yu, Georg Pardi, Johannes von Hoyer, Markus Rokicki, Anett Hoppe, Peter Holtz, Yvonne Kammerer, Stefan Dietze, Ralph Ewerth

Related work in this field, also called search as learning, has focused on behavioral or text resource features to predict learning outcome and knowledge gain.

Feature Importance

Citation Recommendation for Research Papers via Knowledge Graphs

1 code implementation10 Jun 2021 Arthur Brack, Anett Hoppe, Ralph Ewerth

Citation recommendation for research papers is a valuable task that can help researchers improve the quality of their work by suggesting relevant related work.

Citation Recommendation Knowledge Graphs

Unsupervised Video Summarization via Multi-source Features

1 code implementation26 May 2021 Hussain Kanafani, Junaid Ahmed Ghauri, Sherzod Hakimov, Ralph Ewerth

Our evaluation shows that we obtain state-of-the-art results on both datasets, while also highlighting the shortcomings of previous work with regard to the evaluation methodology.

Unsupervised Video Summarization

Interpretable Semantic Photo Geolocation

1 code implementation30 Apr 2021 Jonas Theiner, Eric Mueller-Budack, Ralph Ewerth

State-of-the-art methods treat the task as a classification problem, where the choice of the classes, that is the partitioning of the world map, is crucial for the performance.

Photo geolocation estimation

QuTI! Quantifying Text-Image Consistency in Multimodal Documents

1 code implementation28 Apr 2021 Matthias Springstein, Eric Müller-Budack, Ralph Ewerth

The World Wide Web and social media platforms have become popular sources for news and information.

Fact Checking Misinformation

Supervised Video Summarization via Multiple Feature Sets with Parallel Attention

2 code implementations23 Apr 2021 Junaid Ahmed Ghauri, Sherzod Hakimov, Ralph Ewerth

The proposed architecture utilizes an attention mechanism before fusing motion features and features representing the (static) visual content, i. e., derived from an image classification model.

Automated Feature Engineering Multimodal Deep Learning +1

Analysing the Requirements for an Open Research Knowledge Graph: Use Cases, Quality Requirements and Construction Strategies

no code implementations11 Feb 2021 Arthur Brack, Anett Hoppe, Markus Stocker, Sören Auer, Ralph Ewerth

Current science communication has a number of drawbacks and bottlenecks which have been subject of discussion lately: Among others, the rising number of published articles makes it nearly impossible to get a full overview of the state of the art in a certain field, or reproducibility is hampered by fixed-length, document-based publications which normally cannot cover all details of a research work.

Knowledge Graphs

Cross-Domain Multi-Task Learning for Sequential Sentence Classification in Research Papers

1 code implementation11 Feb 2021 Arthur Brack, Anett Hoppe, Pascal Buschermöhle, Ralph Ewerth

Our approach outperforms the state of the art on full paper datasets significantly while being on par for datasets consisting of abstracts.

Multi-Task Learning Sentence +1

Coreference Resolution in Research Papers from Multiple Domains

1 code implementation4 Jan 2021 Arthur Brack, Daniel Uwe Müller, Anett Hoppe, Ralph Ewerth

We present the following contributions: (1) We annotate a corpus for coreference resolution that comprises 10 different scientific disciplines from Science, Technology, and Medicine (STM); (2) We propose transfer learning for automatic coreference resolution in research papers; (3) We analyse the impact of coreference resolution on knowledge graph (KG) population; (4) We release a research KG that is automatically populated from 55, 485 papers in 10 STM domains.

 Ranked #1 on Coreference Resolution on STM-coref (using extra training data)

coreference-resolution Information Retrieval +2

Ontology-driven Event Type Classification in Images

1 code implementation9 Nov 2020 Eric Müller-Budack, Matthias Springstein, Sherzod Hakimov, Kevin Mrutzek, Ralph Ewerth

Event classification can add valuable information for semantic search and the increasingly important topic of fact validation in news.

Classification General Classification +2

Classification of Important Segments in Educational Videos using Multimodal Features

1 code implementation26 Oct 2020 Junaid Ahmed Ghauri, Sherzod Hakimov, Ralph Ewerth

Our experiments investigate the impact of visual and temporal information, as well as the combination of multimodal features on importance prediction.

Classification General Classification

MLM: A Benchmark Dataset for Multitask Learning with Multiple Languages and Modalities

1 code implementation14 Aug 2020 Jason Armitage, Endri Kacupaj, Golsa Tahmasebzadeh, Swati, Maria Maleshkova, Ralph Ewerth, Jens Lehmann

We demonstrate the value of the resource in developing novel applications in the digital humanities with a motivating use case and specify a benchmark set of tasks to retrieve modalities and locate entities in the dataset.

Representation Learning Scene Understanding

Check_square at CheckThat! 2020: Claim Detection in Social Media via Fusion of Transformer and Syntactic Features

1 code implementation21 Jul 2020 Gullal S. Cheema, Sherzod Hakimov, Ralph Ewerth

In this digital age of news consumption, a news reader has the ability to react, express and share opinions with others in a highly interactive and fast manner.

Fact Checking Retrieval +2

A Feature Analysis for Multimodal News Retrieval

no code implementations13 Jul 2020 Golsa Tahmasebzadeh, Sherzod Hakimov, Eric Müller-Budack, Ralph Ewerth

Content-based information retrieval is based on the information contained in documents rather than using metadata such as keywords.

Information Retrieval News Retrieval +2

Requirements Analysis for an Open Research Knowledge Graph

no code implementations20 May 2020 Arthur Brack, Anett Hoppe, Markus Stocker, Sören Auer, Ralph Ewerth

Current science communication has a number of drawbacks and bottlenecks which have been subject of discussion lately: Among others, the rising number of published articles makes it nearly impossible to get an overview of the state of the art in a certain field, or reproducibility is hampered by fixed-length, document-based publications which normally cannot cover all details of a research work.

Knowledge Graphs

Multimodal Analytics for Real-world News using Measures of Cross-modal Entity Consistency

no code implementations23 Mar 2020 Eric Müller-Budack, Jonas Theiner, Sebastian Diering, Maximilian Idahl, Ralph Ewerth

In this paper, we introduce a novel task of cross-modal consistency verification in real-world news and present a multimodal approach to quantify the entity coherence between image and text.

Entity Linking

SlideImages: A Dataset for Educational Image Classification

no code implementations19 Jan 2020 David Morris, Eric Müller-Budack, Ralph Ewerth

We have reserved all the actual educational images as a test dataset in order to ensure that the approaches using this dataset generalize well to new educational images, and potentially other domains.

Classification General Classification +1

Investigating Correlations of Inter-coder Agreement and Machine Annotation Performance for Historical Video Data

no code implementations24 Jul 2019 Kader Pustu-Iren, Markus Mühling, Nikolaus Korfhage, Joanna Bars, Sabrina Bernhöft, Angelika Hörth, Bernd Freisleben, Ralph Ewerth

Video indexing approaches such as visual concept classification and person recognition are essential to enable fine-grained semantic search in large-scale video archives such as the historical video collection of former German Democratic Republic (GDR) maintained by the German Broadcasting Archive (DRA).

Classification General Classification +1

Understanding, Categorizing and Predicting Semantic Image-Text Relations

no code implementations20 Jun 2019 Christian Otto, Matthias Springstein, Avishek Anand, Ralph Ewerth

Two modalities are often used to convey information in a complementary and beneficial manner, e. g., in online news, videos, educational resources, or scientific publications.

Image Captioning Information Retrieval +2

"Is this an example image?" -- Predicting the Relative Abstractness Level of Image and Text

no code implementations23 Jan 2019 Christian Otto, Sebastian Holzki, Ralph Ewerth

In this paper, we present an approach to predict the (cross-modal) relative abstractness level of a given image-text pair, that is whether the image is an abstraction of the text or vice versa.

Retrieval

Geolocation Estimation of Photos using a Hierarchical Model and Scene Classification

1 code implementation ECCV 2018 Eric Muller-Budack, Kader Pustu-Iren, Ralph Ewerth

While the successful estimation of a photo's geolocation enables a number of interesting applications, it is also a very challenging task.

 Ranked #1 on Photo geolocation estimation on Im2GPS (Street level (1 km) metric)

General Classification Image Retrieval +3

Finding Person Relations in Image Data of the Internet Archive

no code implementations21 Jun 2018 Eric Müller-Budack, Kader Pustu-Iren, Sebastian Diering, Ralph Ewerth

In this paper, we introduce a system for person recognition in image content of web news stored in the Internet Archive.

Face Recognition Person Recognition

Recommending Scientific Videos based on Metadata Enrichment using Linked Open Data

no code implementations19 Jun 2018 Justyna Medrek, Christian Otto, Ralph Ewerth

The amount of available videos in the Web has significantly increased not only for entertainment etc., but also to convey educational or scientific information in an effective way.

Optical Character Recognition Optical Character Recognition (OCR) +2

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