About

Liviu-Daniel Ștefan is a researcher with the AI Multimedia Lab, CAMPUS Research Institute, and a collaborator with the Faculty of Electronics, Telecommunications and Information Technology, National University of Science & Technology POLITEHNICA Bucharest, Romania. His research interests cover deep learning for multimedia classification, and multimedia / video / image processing and analysis for various applications, e.g., video surveillance, medical diagnosis, etc. He has been a member of the organizing team for several benchmarking campaigns (e.g., ChaLearn ICPR Multimedia Information Processing for Personality & Social Networks Analysis Challenge), conferences (e.g., ACM ICMR 2017, ICPR workshops 2018, CLEF 2021) and part of the research team of several Romanian/EU funded research projects.

Experience

Domains

• Artificial intelligence: Image/video recognition and understanding; Cross-media retrieval; Large language models; Ensemble learning; Neural architecture search; Continual learning; Federated learning.
• Hardware-software co-design: Embedded Systems; Real-Time Systems; Performance Optimization; Parallel Computing.
• Web development: Full-Stack Development;

Researcher

Responsible with the research and development of AI modules and systems:

• 2024–2026: Project "Building Collections of Data for Advanced Training of Artificial Intelligence Algorithms in National Security Applications";
• 2024–2026: Project "Linguistic Analysis and Processing Toolkit for Romanian Language RoNLP";
• 2024–2026: Project "Artificial Intelligence Enabled Advanced Integrated System for Vehicle Identification";
• 2024–2026: Project "Detecting Relationships between Entities in Unstructured and Structured Data DeteRel";
• 2024–2025: Project "Keysight 2: AI for Hardware-Software Co-design";
• 2023–2026: Project "ADER 6.3.13: Smart Viticulture Based on IoT Techniques - Premise for Climate Change Management";
• 2021–2023: Project "IDENEO: Identifying the Unusual Behavior of People in Video Streams";
• 2021–2023: Project "DeepVisionRomania: Identifying People in Video Streams using Silhouette Biometrics";
• 2021–2023: Project "PIMS-IAT: Platform Specialized in Identifying and Evaluating Early Warning Indices for Crisis Management";
• 2020–2024: Project "H2020 AI4Media: A European Excellence Centre for Media, Society and Democracy";
• 2020–2022: Project "Virtual Guardian: Artificial Intelligence Powered Multi-Sensor System for Automatic Securing of Areas of Interest";
• 2020–2022: Project "SMARTRetail: Enhancing and Improving Customer Experience and Services in Supermarkets via SMART Artificial Intelligence Powered Systems";
• April–July 2020: Project Hana 2: Financial Data Augmentation and Forecasting Using Advanced AI Techniques;
• March–October 2020: Project Keysight 1: Machine Learning Techniques for Generating Network Traffic Data;
• May–December 2019: Project NXP 1: RISC V-based Hardware-Software System for Machine Learning Applications;
• 2017–2020: Project "SPIA-VA: Technologies and Innovative Video Systems for Person Re-Identification and Analysis of Dissimulated Behavior";
• 2017–2019: Project "UMETECH: University & Media Technology for Cultural Heritage";
• 2017–2018: Project "SPOTTER: Real-time IP Camera-based Intelligent Video Surveillance Security System with DROP Retrieval".

Teaching

Responsible for several laboratories:

• 2019–2020: Computer Vision Fundamentals, postgraduate cycle, Faculty of Electronics, Telecommunications and Information Technology, Polytechnic University of Bucharest;
• 2018–2019: Image Analysis and Processing, undergraduate cycle, Industrial Engineering and Robotics Faculty, Polytechnic University of Bucharest;
• 2016–present: Computer Programming — C language, undergraduate cycle, Faculty of Electronics, Telecommunications and Information Technology, Polytechnic University of Bucharest;
• 2016–2022: Data Structures and Algorithms — C language, undergraduate cycle, Faculty of Electronics, Telecommunications and Information Technology, Polytechnic University of Bucharest.

Education

• 2019 September–2020 September: Entrepreneurship training courses, Polytechnic University of Bucharest, Romania;
• 2017 November 6–15: Innovation challenge for PhD Students And Researchers, EIT Raw Materials Academy, Trento, Italy;
• 2017 February–2017 July: Researcher at University of Applied Sciences Western Switzerland, Institute of Information Systems of the HES-SO Valais-Wallis, MedGIFT Lab, Sierre, Switzerland;
• 2016–2021: PhD studies in electronic engineering telecommunications and information tehnologies, Polytechnic University of Bucharest, Faculty of Electronics, Telecommunications and Information Technology, Romania;
• 2014–2016: Master’s degree in multimedia technologies in biometrics and information security applications, Polytechnic University of Bucharest, Faculty of Electronics, Telecommunications and Information Technology, Romania;
• 2009–2012: Bachelor’s degree in economics, Faculty of Economics, Bucharest, Romania.

Technology Stack

Programming Languages

• C, C++, Python, MATLAB, Go, Ruby, Rust, PHP, Bash, Powershell;

AI and Machine Learning Tools

• PyTorch, TensorFlow, Keras, Glow, ONNX, OpenVINO;

Data Analytics at Scale

• NumPy, SciPy, Pandas, Apache Spark, Numba;

Web Development

• Django, Ruby on Rails, JavaScript, Liquid, HTML, CSS/SCSS/Sass, Caddy;

Databases and Cloud Storage

• SQL, Postgres, Redis, minio;

Distributed Systems and Messaging

• RabbitMQ, Celery, Flower;

Containerization, Virtualization and Infrastructure

• Docker, Docker Compose, Kubernetes;

Document Editors

• LaTeX, Markdown, vim;

Version Control

• git;

Operating Systems

• Linux, Windows, Windows Server.

Web development

Developer and maintainer of:

• AI4MediaBench: AI4MediaBench is a EaaS platform for AI algorithms benchmarking, designed to facilitate collaboration among researchers, developers, and data scientists. It serves as a venue for running and participating in competitions and benchmarks, offering a space for testing new algorithms against reference datasets or submitting challenging data to reference algorithms.
• CAMPUS Research Institute website;
• Doctoral School of Electronics, Telecommunications & Information Technology, National University of Science and Technology POLITEHNICA Bucharest website;
• AIMultimediaLab website;
• MAD2022, MAD2024 ACM International Workshop on Multimedia AI against Disinformation websites;
• Vodafone Innovation Hub - National University of Science and Technology POLITEHNICA Bucharest website;

Awards

• 2023: DeepVision in PatriotFest 2023, Artificial Intelligence category;
• 2017: Finding and Classifying Tuberculosis Types for a Targeted Treatment, in the ImageCLEFtuberculosis task.

Reviewer for:

Journals

• ACM Computing Surveys;
• IEEE Transactions on Affective Computing;
• ACM Transactions on Multimedia Computing, Communications and Applications;

Conferences

• International Conference on Pattern Recognition (ICPR) [2024];
• IEEE Winter Conference on Applications of Computer Vision [2021, 2022, 2023, 2024, 2025];
• ACM International Conference on Multimedia (ACMMM) [2019, 2020, 2021, 2022, 2023, 2024];
• ACM International Conference on Multimedia Retrieval (ICMR) [2022, 2023, 2024];
• IEEE International Conference on Multimedia and Expo [2023, 2024];
• European Conference on Information Retrieval (ECIR) [2020];
• ACM International Conference on Multimedia- -Open-Source (ACMMM22-Open-Source) [2022];
• International Symposium on Multimedia (ISM) [2019];
• International Conference on MultiMedia Modeling (MMM) [2019];
• IEEE International Conference on Artificial Intelligence and Virtual Reality (IEEE AIVR) [2019];
• Multimedia Evaluation Benchmark Workshop (MediaEval) [2018];
• International Conference on Communications [2019, 2020, 2021, 2022];
• International Workshop on Research & Innovation for Secure Societies (RISS) [2019, 2020, 2021, 2022].

Scientific committees

• 2023–2024: Technical support for ImageCLEF 2024, Cross Language Evaluation Forum (CLEF);
• 2022–2023: Member in the organizing comittee for the ImageCLEFfusion task in the ImageCLEF, Cross Language Evaluation Forum (CLEF).
• 2021: Member in the organizing comittee for the Conference and Labs of the Evaluation Forum (CLEF);
• 2020–2021: Member in the organizing comittee for the ImageCLEFdrawnUI task, ImageCLEF, part of the Conference and Labs of the Evaluation Forum (CLEF);
• 2019: Member in the organizing comittee for the Predicting Media Memorability Task, MediaEval Benchmarking Initiative for Multimedia Evaluation;
• 2018: Co-organizer of the International Conference on Pattern Recognition (ICPR), Multimedia Information Processing for Personality & Social Networks Analysis Challenge;
• 2017: Member in the organizing committee of the ACM International Conference on Multimedia Retrieval (ICMR).