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ViCoS Lab

Alan Lukežič, PhD

Researcher
  alan.lukezic@fri.uni-lj.si
  +386 1 479 8245

About

I received my PhD degree at the Faculty of Computer and Information Science, University of Ljubljana in 2021 under the supervision of prof. Matej Kristan, PhD.

My research interests are visual object tracking, video object segmentation, deep learning, pattern recognition and machine learning. In the past I was working on the industrial project for surface quality inspection.

I am a teaching assistant at the Advanced Computer Vision Methods course.

Google Scholar | GitHub

Research

Discriminative correlation filter tracking

We explore online learning of target visual models via discriminative correlation filters. The research spans hand-crafted features and optimization techniques for CPU-based tracking as well as deep learning variants with discriminative feature adaptation and online segmentation.

Tracking transparent objects

We develop new algorithms for tracking transparent objects like glasses, cups or jars.

Visual object tracking performance evaluation

One of the problems of visual tracking evaluation is a lack of a consistent evaluation methodology. This is hampering the cross-paper tracker comparison and faster advancement of the field. In our research we investigate different aspects of tracking evaluation. A continuous effort that is a part of our work is also the Visual Object Tracking Challenge (VOT).

Apparent motion patterns

We propose to go beyond pre-recorded benchmarks with post-hoc annotations by presenting an approach that utilizes omnidirectional videos to generate realistic, consistently annotated, short-term tracking scenarios with exactly parameterized motion patterns..

Drone tracking

The tracking algorithms we developed can be applied to autonomous robots like drones. Here are some results from this research application.

Dense object counting in underwater imagery

The main goal of this research is development of computer-vision-based automated counters applicable underwater imagery. Such counters are crucial for processing extremely large datasets, vastly reducing the required manual labor and facilitating census orders of magnitude grater than what is possible with standard techniques. The methods leverage learning on specific type of images to maximize a task-specific detection performance.

Low-shot counting

The main goal of this research is development of computer-vision-based automated counters that do not require large training datasets, but are adapted to a previously unseen category by using only a few training examples (few-shot), no training examples (zero-shot) or text-based prompts (text-prompt-based).

Current projects

COMETAdvanced Computer Vision for Understanding Complex Object Motion in Dynamic Environments

January 2025 - December 2027
This project aims to develop a novel motion understanding paradigm, centered on automatically determining the minimal scene understanding required to track one or multiple objects throughout a video. It tackles three core challenges: developing a few-shot object detector capable of identifying all objects in a category based on limited examples, tracking individual objects amid distractors, and extending this to track transformable objects in complex environments.

Computer Vision

January 2019 - December 2027
Computer vision is becoming a focal problem area of artificial intelligence. On the wings of deep learning it has become very powerful tool for solving various problems involving processing of visual information. In the framework of this programme we are addressing several research questions ranging from visual tracking to visual learning for autonomous robots, with a special emphasis on going beyond supervised deep learning.

Awards

  • Excellent research achievements in 2023 award by the Slovenian Research Agency for our work on few-shot counting ARIS.
  • Award for excellent research achievement in 2024 at FRI-UL.
  • dr. Ana Mayer Kansky University award for the Phd thesis.
  • Best paper award at ERK 2023 Pattern recognition section (co-author)
  • BMVC2022 best paper award for our work on transparent object tracking
  • Excellent research achievements in 2021 award by the Slovenian Research Agency for our work on segmentation tracking
  • Research excellence award by University of Ljubljana for our work on segmentation tracking (2022)
  • Plaque of excellence for the outstanding scientific paper: Discriminative Correlation Filter Tracker with Channel and Spatial Reliability, awarded by Slovenian Pattern Recognition Society in 2021
  • Golden plaque award for outstanding scientific achievements of a research group awarded by University of Ljubljana
  • A special award for research work in 2020 for the publication: Performance evaluation methodology for long-term single-object tracking, published at IEEE Transactions on Cybernetics
  • A special award for research work for PhD students for three conference publications in 2019:
    • CDTB: A Color and Depth Visual Object Tracking Dataset and Benchmark (ICCV)
    • FuCoLoT – A Fully-Correlational Long-Term Tracker. Asian Conference on Computer Vision (ACCV)
    • Object Tracking by Reconstruction with View-Specific Discriminative Correlation Filters (CVPR)
  • A special award for research work for PhD students for the work: Discriminative Correlation Filter Tracker with Channel and Spatial Reliability, published at International Journal of Computer Vision (2018)
  • A special award for research work for PhD students for the work: Deformable Parts Correlation Filters for Robust Visual Tracking, published at IEEE Transactions on Cybernetics (2017)
  • Faculty’s Prešeren award for the master’s thesis (2015)
  • Dean’s recognition for excellent ultimate success in completing their studies (2015)

Publications

  •  
    A Distractor-Aware Memory for Visual Object Tracking with SAM2
    Jovana Videnović, Alan Lukežič and Matej Kristan
    IEEE / CVF Computer Vision and Pattern Recognition Conference (CVPR), 2025
  •  
    A Detect-and-Verify Paradigm for Low-Shot Counting - DAVE
    Jer Pelhan, Alan Lukežič, Vitjan Zavrtanik and Matej Kristan
    IEEE / CVF Computer Vision and Pattern Recognition Conference (CVPR), 2024
  •  
    A New Dataset and a Distractor-Aware Architecture for Transparent Object Tracking
    Alan Lukežič, Žiga Trojer, Jiří Matas and Matej Kristan
    International Journal of Computer Vision, Springer, 2024
  •  
    A Novel Unified Architecture for Low-Shot Counting by Detection and Segmentation
    Jer Pelhan, Alan Lukežič, Vitjan Zavrtanik and Matej Kristan
    The Thirty-Eighth Annual Conference on Neural Information Processing Systems, NeurIPS2024, 2024
  •  
    The Second Visual Object Tracking Segmentation VOTS2024 Challenge Results
    Matej Kristan, Jiri Matas, Pavel Tokmakov, Michael Felsberg, Luka Čehovin Zajc, Alan Lukežič, Khanh-Tung Tran, Xuan-Son Vu, Johanna Bjorklund, et al.
    European conference on computer vision workshops, VOTS2024 workshop, 2024
  •  
    Tracking and Segmentation of Transparent Objects
    Alan Lukežič and Matej Kristan
    ERK, 2024
  •  
    A Low-Shot Object Counting Network With Iterative Prototype Adaptation
    Nikola Djukic, Alan Lukežič, Vitjan Zavrtanik and Matej Kristan
    ICCV2023, 2023
  • Guided Video Object Segmentation by Tracking
    Jer Pelhan, Matej Kristan, Alan Lukežič, Jiri Matas and Luka Čehovin Zajc
    Elektrotehniški vestnik, Journal of Electrical Engineering and Computer Science, 2023
  •  
    A Long-Term Discriminative Single Shot Segmentation Tracker
    Benjamin Džubur, Alan Lukežič and Matej Kristan
    International Electrotechnical and Computer Science Conference (ERK), 2022
  •  
    The Tenth Visual Object Tracking VOT2022 Challenge Results
    Matej Kristan, Aleš Leonardis, Jiri Matas, Michael Felsberg, Roman Pflugfelder, Joni-Kristian Kamarainen, Hyung Jin Chang, Martin Danelljan, Luka Čehovin Zajc, et al.
    ECCV Workshops 2022, 2022
  •  
    Trans2k: Unlocking the Power of Deep Models for Transparent Object Tracking
    Alan Lukežič, Žiga Trojer, Jiří Matas and Matej Kristan
    In Proceedings of the British Machine Vision Conference (BMVC), 2022
  •  
    A Discriminative Single-Shot Segmentation Network for Visual Object Tracking
    Alan Lukežič, Jiří Matas and Matej Kristan
    IEEE Transactions on Pattern Analysis and Machine Intelligence, 2021
  •  
    The Ninth Visual Object Tracking VOT2021 Challenge Results
    Matej Kristan, Jirı Matas, Aleš Leonardis, Michael Felsberg, Roman Pflugfelder, Joni-Kristian Kamarainen, Hyung Jin Chang, Martin Danelljan, Luka Čehovin Zajc, et al.
    VOT2021 challenge workshop, ICCV workshops, 2021
  •  
    D3S - A Discriminative Single Shot Segmentation Tracker
    Alan Lukežič, Jiří Matas and Matej Kristan
    IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2020
  •  
    Performance Evaluation Methodology for Long-Term Single Object Tracking
    Alan Lukežič, Luka Čehovin Zajc, Tomáš Vojíř, Jiří Matas and Matej Kristan
    IEEE Transactions on Cybernetics, 2020
  •  
    CDTB: A Color and Depth Visual Object Tracking Dataset and Benchmark
    Alan Lukežič, Ugur Kart, Jani Käpylä, Ahmed Durmush, Joni-Kristian Kämäräinen, Jiří Matas and Matej Kristan
    IEEE International Conference on Computer Vision (ICCV), 2019
  •  
    Object Tracking by Reconstruction with View-Specific Discriminative Correlation Filters
    Ugur Kart, Alan Lukežič, Matej Kristan, Joni-Kristian Kamarainen and Jiri Matas
    Computer Vision and Pattern Recognition (CVPR), 2019
  •  
    Discriminative Correlation Filter Tracker with Channel and Spatial Reliability
    Alan Lukežič, Tomas Vojir, Luka Čehovin Zajc, Jiri Matas and Matej Kristan
    International Journal of Computer Vision, Springer, 2018
  •  
    Fast Spatially Regularized Correlation Filter Tracker
    Alan Lukežič, Luka Čehovin Zajc and Matej Kristan
    International Electrotechnical and Computer Science Conference (ERK), 2018
  •  
    FuCoLoT - A Fully-Correlational Long-Term Tracker
    Alan Lukežič, Luka Čehovin Zajc, Tomas Vojir, Jiri Matas and Matej Kristan
    Asian Conference on Computer Vision, 2018
  •  
    Improving Traffic Sign Detection with Temporal Information
    Domen Tabernik, Jon Muhovič, Alan Lukežič and Danijel Skočaj
    Proceedings of the 23rd Computer Vision Winter Workshop, 2018
  •  
    Beyond standard benchmarks: Parameterizing performance evaluation in visual object tracking
    Luka Čehovin Zajc, Alan Lukežič, Aleš Leonardis and Matej Kristan
    IEEE International Conference on Computer Vision (ICCV2017), 2017
  •  
    Deformable Parts Correlation Filters for Robust Visual Tracking
    Alan Lukežič, Luka Čehovin Zajc and Matej Kristan
    IEEE Transactions on Cybernetics, 2017
  •  
    Discriminative Correlation Filter with Channel and Spatial Reliability
    Alan Lukežič, Tomas Vojir, Luka Čehovin Zajc, Jiri Matas and Matej Kristan
    The IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2017
  •  
    The Visual Object Tracking VOT2017 Challenge Results
    Matej Kristan, Aleš Leonardis, Jiri Matas, Michael Felsberg, Roman Pflugfelder, Luka Čehovin Zajc, Tomas Vojir, Gustav Häger, Alan Lukežič, et al.
    VOT workshop 2017, ICCV workshops 2017, 2017
  •  
    The Visual Object Tracking VOT2016 challenge results
    Matej Kristan, Aleš Leonardis, Jiri Matas, Michael Felsberg, Roman Pflugfelder, Luka Čehovin Zajc, Tomas Vojir, Gustav Häger, Alan Lukežič and Gustavo Fernandez
    Computer Vision – ECCV 2016 Workshops, Springer, 2016
  •  
    Efficient spring system optimization for part-based visual tracking
    Alan Lukežič, Luka Čehovin Zajc and Matej Kristan
    Proceedings of the 24th International Electrotechnical and Computer Science Conference (ERK), 2015
  •  
    The Visual Object Tracking VOT2015 challenge results
    Matej Kristan, Jiri Matas, Aleš Leonardis, Michael Felsberg, Luka Čehovin Zajc, Gustavo Fernandez, Tomas Vojir, Gustav Häger, Georg Nebehay, et al.
    Visual Object Tracking Workshop 2015 at ICCV2015, 2015
  •  
    The Visual Object Tracking VOT2014 challenge results
    Matej Kristan, Roman Pflugfelder, Aleš Leonardis, Jiri Matas, Luka Čehovin Zajc, Georg Nebehay, Tomas Vojir, Gustavo Fernandez, Alan Lukežič, et al.
    Visual Object Tracking Workshop 2014 at ECCV2014, 2014
Faculty of Computer and Information Science

Visual Cognitive Systems Laboratory

University of Ljubljana

Faculty of Computer and Information Science

Večna pot 113
SI-1000 Ljubljana
Slovenia
Tel.: +386 1 479 8245