News   Publications   Awards    Google Scholar

I am a lecturer and senior postdoctoral researcher at Computer Vision Lab, ETH Zurich, working under Prof. Luc Van Gool. My broad research fields are Computer Vision and Machine Learning. The focus of my research is on semantic and geometric visual perception, involving multiple domains and visual conditions, multiple visual and non-visual modalities, and incorporating theory from physics and optics into the models I develop, with emphasis on applications to autonomous cars and robots. Since 2021, I am the Principal Engineer in TRACE-Zurich, a large-scale project on computer vision for autonomous cars and robots running at Computer Vision Lab and funded by Toyota Motor Europe. Moreover, I am the Group Associate of Computer Vision Lab at the EFCL research center, leading the EFCL project Sensor Fusion in which we develop adaptive sensor fusion architectures and multi-modal datasets for high-level visual perception, and the Principal Investigator of the ETH Career Seed project "Nighttime Photorealistic Simulation for Robust Semantic Driving Scene Understanding". I teach the advanced Master-level course Computer Vision and Artificial Intelligence for Autonomous Cars at ETH Zurich. I obtained my PhD in Electrical Engineering and Information Technology from ETH Zurich in June 2021, working at Computer Vision Lab and supervised by Prof. Luc Van Gool. Prior to joining Computer Vision Lab, I received my MSc in Computer Science from ETH Zurich in 2016 and my Diploma in Electrical and Computer Engineering from National Technical University of Athens in 2014, conducting my Diploma thesis at CVSP Group under the supervision of Prof. Petros Maragos.



News

2024-07-01: We got three papers accepted to ECCV 2024! The MUSES dataset for multimodal segmentation, the ConcreteNet architecture for 3D visual grounding, and Bayesian Self-Training for 3D segmentation. Associated datasets, benchmarks and code are publicly available.

2024-04-04: We got three papers accepted to CVPR 2024: UniDepth and VPSeg as highlights (top 3% of total submissions), and MuRF. Associated code is publicly available.

2024-03-23: We got a paper accepted to SIGGRAPH 2024: Radar Fields. Associated code is publicly available.

2023-09-21: We got a paper accepted to NeurIPS 2023: Real-Time Motion Prediction via Heterogeneous Polyline Transformer with Relative Pose Encoding. Associated code is publicly available.

2023-09-12: We got a paper accepted to BMVC 2023 as oral: Maskomaly: Zero-Shot Mask Anomaly Segmentation. Associated code is publicly available.

2023-07-14: We got a paper accepted to ICCV 2023: Contrastive Model Adaptation for Cross-Condition Robustness in Semantic Segmentation. Associated code is publicly available.

2022-12-19: I have received the ETH Zurich Career Seed Award 2022, which will support the proposed independent research project I will lead in 2023, titled "Nighttime Photorealistic Simulation for Robust Semantic Driving Scene Understanding".

Publications

2024    2023    2022    2021    2020    2019    2018    2017

MUSES: The Multi-Sensor Semantic Perception Dataset for Driving under Uncertainty
Tim Broedermann*, David Bruggemann*, Christos Sakaridis, Kevin Ta, Odysseas Liagouris, Jason Corkill, and Luc Van Gool
European Conference on Computer Vision (ECCV), 2024
[PDF]   [Dataset and Benchmark]   [Code]   [BibTeX]   [Supplement]   [arXiv]

Four Ways to Improve Verbo-visual Fusion for Dense 3D Visual Grounding
Ozan Unal, Christos Sakaridis, Suman Saha, and Luc Van Gool
European Conference on Computer Vision (ECCV), 2024
[PDF]   [Code]   [Project]   [BibTeX]   [Supplement]   [arXiv]

Bayesian Self-Training for Semi-Supervised 3D Segmentation
Ozan Unal, Christos Sakaridis, and Luc Van Gool
European Conference on Computer Vision (ECCV), 2024
[PDF]   [Project]   [BibTeX]   [Supplement]   [arXiv]

UniDepth: Universal Monocular Metric Depth Estimation
Luigi Piccinelli, Yung-Hsu Yang, Christos Sakaridis, Mattia Segu, Siyuan Li, Luc Van Gool, Fisher Yu
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2024 - Highlight
[PDF]   [Code]   [BibTeX]   [arXiv]   [Project]

Vanishing-Point-Guided Video Semantic Segmentation of Driving Scenes
Diandian Guo, Deng-Ping Fan, Tongyu Lu, Christos Sakaridis, and Luc Van Gool
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2024 - Highlight
[PDF]   [BibTeX]   [arXiv]   [Project]

Radar Fields: Frequency-Space Neural Scene Representations for FMCW Radar
David Borts, Erich Liang, Tim Broedermann, Andrea Ramazzina, Stefanie Walz, Edoardo Palladin, Jipeng Sun, David Bruggemann, Christos Sakaridis, Luc Van Gool, Mario Bijelic, and Felix Heide
SIGGRAPH, 2024
[PDF]   [Code]   [Project]   [BibTeX]   [arXiv]

MuRF: Multi-Baseline Radiance Fields
Haofei Xu, Anpei Chen, Yuedong Chen, Christos Sakaridis, Yulun Zhang, Marc Pollefeys, Andreas Geiger, and Fisher Yu
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2024
[PDF]   [Code]   [BibTeX]   [arXiv]   [Project]

Sun Off, Lights On: Photorealistic Monocular Nighttime Simulation for Robust Semantic Perception
Konstantinos Tzevelekakis, Shutong Zhang, Luc Van Gool, and Christos Sakaridis
arXiv, 2024
[PDF]   [BibTeX]   [arXiv]

ACDC: The Adverse Conditions Dataset with Correspondences for Robust Semantic Driving Scene Perception
Christos Sakaridis, Haoran Wang, Ke Li, Rene Zurbruegg, Arpit Jadon, Wim Abbeloos, Daniel Olmeda Reino, Luc Van Gool, and Dengxin Dai
arXiv, 2024
[PDF]   [Dataset]   [BibTeX]   [arXiv]   [Supplement]

OVeNet: Offset Vector Network for Semantic Segmentation
Stamatis Alexandropoulos, Christos Sakaridis, and Petros Maragos
IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2024
[PDF]   [Code]   [BibTeX]   [arXiv]

TrafficBots V1.5: Traffic Simulation via Conditional VAEs and Transformers with Relative Pose Encoding
Zhejun Zhang, Christos Sakaridis, and Luc Van Gool
Technical report, 2024
[PDF]   [Code]   [BibTeX]   [arXiv]

Condition-Invariant Semantic Segmentation
Christos Sakaridis, David Bruggemann, Fisher Yu, and Luc Van Gool
arXiv, 2023
[PDF]   [Code]   [BibTeX]   [arXiv]

Contrastive Model Adaptation for Cross-Condition Robustness in Semantic Segmentation
David Bruggemann, Christos Sakaridis, Tim Broedermann, and Luc Van Gool
IEEE/CVF International Conference on Computer Vision (ICCV), 2023
[PDF]   [Code]   [BibTeX]   [arXiv]

iDisc: Internal Discretization for Monocular Depth Estimation
Luigi Piccinelli, Christos Sakaridis, and Fisher Yu
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2023
[PDF]   [Code]   [BibTeX]   [arXiv]   [Project]

Event-Based Frame Interpolation with Ad-hoc Deblurring
Lei Sun, Christos Sakaridis, Jingyun Liang, Peng Sun, Jiezhang Cao, Kai Zhang, Qi Jiang, Kaiwei Wang, and Luc Van Gool
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2023
[PDF]   [Code]   [Dataset part 1]   [Dataset part 2]   [BibTeX]   [arXiv]   [Project]

Indiscernible Object Counting in Underwater Scenes
Guolei Sun, Zhaochong An, Yun Liu, Ce Liu, Christos Sakaridis, Deng-Ping Fan, and Luc Van Gool
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2023
[PDF]   [Dataset]   [Code]   [BibTeX]   [arXiv]   [Project]

Real-Time Motion Prediction via Heterogeneous Polyline Transformer with Relative Pose Encoding
Zhejun Zhang, Alexander Liniger, Christos Sakaridis, Fisher Yu, and Luc Van Gool
Conference on Neural Information Processing Systems (NeurIPS), 2023
[PDF]   [Code]   [BibTeX]   [arXiv]   [Project]

HRFuser: A Multi-resolution Sensor Fusion Architecture for 2D Object Detection
Tim Broedermann, Christos Sakaridis, Dengxin Dai, and Luc Van Gool
Intelligent Transportation Systems Conference (ITSC), 2023
[PDF]   [Code]   [BibTeX]   [arXiv]

L2E: Lasers to Events for 6-DoF Extrinsic Calibration of Lidars and Event Cameras
Kevin Ta, David Bruggemann, Tim Broedermann, Christos Sakaridis, and Luc Van Gool
IEEE International Conference on Robotics and Automation, 2023
[PDF]   [Code]   [BibTeX]   [arXiv]

Maskomaly: Zero-Shot Mask Anomaly Segmentation
Jan Ackermann, Christos Sakaridis, and Fisher Yu
British Machine Vision Conference (BMVC), 2023 - Oral
[PDF]   [Code]   [BibTeX]   [arXiv]

Refign: Align and Refine for Adaptation of Semantic Segmentation to Adverse Conditions
David Bruggemann, Christos Sakaridis, Prune Truong, and Luc Van Gool
IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2023
[PDF]   [Code]   [BibTeX]   [arXiv]

Advances in Deep Concealed Scene Understanding
Deng-Ping Fan, Ge-Peng Ji, Peng Xu, Ming-Ming Cheng, Christos Sakaridis, and Luc Van Gool
Visual Intelligence, 2023
[PDF]   [Code]   [Datasets]   [BibTeX]   [arXiv]

Masked Vision-language Transformer in Fashion
Ge-Peng Ji, Mingchen Zhuge, Dehong Gao, Deng-Ping Fan, Christos Sakaridis, and Luc Van Gool
Machine Intelligence Research (MIR), 2023
[PDF]   [Code]   [BibTeX]   [arXiv]   [Project]

CamDiff: Camouflage Image Augmentation via Diffusion
Xue-Jing Luo, Shuo Wang, Zongwei Wu, Christos Sakaridis, Yun Cheng, Deng-Ping Fan, and Luc Van Gool
CAAI AIR, 2023
[PDF]   [Code]   [Dataset]   [BibTeX]   [arXiv]

TT-NF: Tensor Train Neural Fields
Anton Obukhov, Mikhail Usvyatsov, Christos Sakaridis, Konrad Schindler, and Luc Van Gool
ICLR Workshops, 2023
[PDF]   [Code]   [Project]   [arXiv]   [BibTeX]

LiDAR Snowfall Simulation for Robust 3D Object Detection
Martin Hahner, Christos Sakaridis, Mario Bijelic, Felix Heide, Fisher Yu, Dengxin Dai, and Luc Van Gool
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2022 - Oral
[PDF]   [Code]   [Models]   [Project]   [BibTeX]   [arXiv]   [Supplement]

P3Depth: Monocular Depth Estimation with a Piecewise Planarity Prior
Vaishakh Patil, Christos Sakaridis, Alexander Liniger, and Luc Van Gool
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2022
[PDF]   [Code]   [BibTeX]   [arXiv]   [Supplement]

Event-Based Fusion for Motion Deblurring with Cross-modal Attention
Lei Sun, Christos Sakaridis, Jingyun Liang, Qi Jiang, Kailun Yang, Peng Sun, Yaozu Ye, Kaiwei Wang, and Luc Van Gool
European Conference on Computer Vision (ECCV), 2022 - Oral
[PDF]   [Code]   [Datasets]   [Project]   [BibTeX]   [arXiv]

Map-Guided Curriculum Domain Adaptation and Uncertainty-Aware Evaluation for Semantic Nighttime Image Segmentation
Christos Sakaridis, Dengxin Dai, and Luc Van Gool
IEEE Transactions on Pattern Analysis and Machine Intelligence (T-PAMI), 2022
[PDF]   [Code]   [UIoU Challenge]   [Project]   [arXiv]   [BibTeX]

Lidar Line Selection with Spatially-Aware Shapley Value for Cost-Efficient Depth Completion
Kamil Adamczewski, Christos Sakaridis, Vaishakh Patil, and Luc Van Gool
Conference on Robot Learning (CoRL), 2022
[PDF]   [BibTeX]

ACDC: The Adverse Conditions Dataset with Correspondences for Semantic Driving Scene Understanding
Christos Sakaridis, Dengxin Dai, and Luc Van Gool
International Conference on Computer Vision (ICCV), 2021
[PDF]   [Dataset]   [BibTeX]   [arXiv]   [Supplement]

Fog Simulation on Real LiDAR Point Clouds for 3D Object Detection in Adverse Weather
Martin Hahner, Christos Sakaridis, Dengxin Dai, and Luc Van Gool
International Conference on Computer Vision (ICCV), 2021
[PDF]   [Code]   [Models]   [Project]   [BibTeX]   [arXiv]   [Supplement]

Scale-Aware Domain Adaptive Faster R-CNN
Yuhua Chen, Haoran Wang, Wen Li, Christos Sakaridis, Dengxin Dai, and Luc Van Gool
International Journal of Computer Vision (IJCV), 2021
[Article]   [Code]   [BibTeX]

Curriculum Model Adaptation with Synthetic and Real Data for Semantic Foggy Scene Understanding
Dengxin Dai, Christos Sakaridis, Simon Hecker, and Luc Van Gool
International Journal of Computer Vision (IJCV), 2020
[PDF]   [BibTeX]   [arXiv]   [Project]
The PDF above is a post-peer-review, pre-copyedit version of the article published in IJCV. The final authenticated version is available online here.

Guided Curriculum Model Adaptation and Uncertainty-Aware Evaluation for Semantic Nighttime Image Segmentation
Christos Sakaridis, Dengxin Dai, and Luc Van Gool
International Conference on Computer Vision (ICCV), 2019
[PDF]   [BibTeX]   [arXiv]   [Project]   [UIoU Challenge]   [Supplement]

Semantic Understanding of Foggy Scenes with Purely Synthetic Data
Martin Hahner, Dengxin Dai, Christos Sakaridis, Jan-Nico Zaech, and Luc Van Gool
Intelligent Transportation Systems Conference (ITSC), 2019
[PDF]   [BibTeX]   [arXiv]   [Project]

Active Contour Methods on Arbitrary Graphs Based on Partial Differential Equations
Christos Sakaridis, Nikos Kolotouros, Kimon Drakopoulos, and Petros Maragos
in Handbook of Numerical Analysis, Volume 20: Processing, Analyzing and Learning of Images, Shapes, and Forms: Part 2, Ron Kimmel and Xue-Cheng Tai (Eds.), Ch. 4, pp. 149-190, Elsevier, 2019
[PDF]   [BibTeX]
The PDF above is a post-peer-review, pre-copyedit version of the article published in HNA. The final authenticated version is available online here.

Model Adaptation with Synthetic and Real Data for Semantic Dense Foggy Scene Understanding
Christos Sakaridis, Dengxin Dai, Simon Hecker, and Luc Van Gool
European Conference on Computer Vision (ECCV), 2018
[PDF]   [BibTeX]   [arXiv]   [Project]  
The final authenticated version is available online here.

Domain Adaptive Faster R-CNN for Object Detection in the Wild
Yuhua Chen, Wen Li, Christos Sakaridis, Dengxin Dai, and Luc Van Gool
IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2018
[arXiv]   [BibTeX]   [Code]

Semantic Foggy Scene Understanding with Synthetic Data
Christos Sakaridis, Dengxin Dai, and Luc Van Gool
International Journal of Computer Vision (IJCV), 2018
[PDF]   [Final PDF: view-only]   [BibTeX]   [arXiv]   [Project]  
The first PDF above is a post-peer-review, pre-copyedit version of the article published in International Journal of Computer Vision. The final authenticated version is available online here.

Theoretical Analysis of Active Contours on Graphs
Christos Sakaridis, Kimon Drakopoulos, and Petros Maragos
SIAM Journal on Imaging Sciences (SIIMS), 2017
[PDF]   [BibTeX]   [arXiv]   [Code]   [Project]

Awards

ETH Zurich Career Seed Award 2022. Acquired a funding of CHF 30,000 from ETH Zurich aimed at excellent young researchers at an early postdoc stage to lead an independent research project titled "Nighttime Photorealistic Simulation for Robust Semantic Driving Scene Understanding" in 2023.

Outstanding Reviewer ECCV 2022. Honored as one of the top 215 reviewers for European Conference on Computer Vision (ECCV) 2022 from a total of 4719 reviewers.