Search Results for author: Christophe De Vleeschouwer

Found 38 papers, 23 papers with code

Camera clustering for scalable stream-based active distillation

no code implementations16 Apr 2024 Dani Manjah, Davide Cacciarelli, Christophe De Vleeschouwer, Benoit Macq

We present a scalable framework designed to craft efficient lightweight models for video object detection utilizing self-training and knowledge distillation techniques.

Clustering Knowledge Distillation +2

Multi-task Learning for Joint Re-identification, Team Affiliation, and Role Classification for Sports Visual Tracking

1 code implementation18 Jan 2024 Amir M. Mansourian, Vladimir Somers, Christophe De Vleeschouwer, Shohreh Kasaei

To demonstrate the effectiveness of PRTreID, it is integrated with a state-of-the-art tracking method, using a part-based post-processing module to handle long-term tracking.

Multi-Task Learning Visual Tracking

SoccerNet 2023 Challenges Results

2 code implementations12 Sep 2023 Anthony Cioppa, Silvio Giancola, Vladimir Somers, Floriane Magera, Xin Zhou, Hassan Mkhallati, Adrien Deliège, Jan Held, Carlos Hinojosa, Amir M. Mansourian, Pierre Miralles, Olivier Barnich, Christophe De Vleeschouwer, Alexandre Alahi, Bernard Ghanem, Marc Van Droogenbroeck, Abdullah Kamal, Adrien Maglo, Albert Clapés, Amr Abdelaziz, Artur Xarles, Astrid Orcesi, Atom Scott, Bin Liu, Byoungkwon Lim, Chen Chen, Fabian Deuser, Feng Yan, Fufu Yu, Gal Shitrit, Guanshuo Wang, Gyusik Choi, Hankyul Kim, Hao Guo, Hasby Fahrudin, Hidenari Koguchi, Håkan Ardö, Ibrahim Salah, Ido Yerushalmy, Iftikar Muhammad, Ikuma Uchida, Ishay Be'ery, Jaonary Rabarisoa, Jeongae Lee, Jiajun Fu, Jianqin Yin, Jinghang Xu, Jongho Nang, Julien Denize, Junjie Li, Junpei Zhang, Juntae Kim, Kamil Synowiec, Kenji Kobayashi, Kexin Zhang, Konrad Habel, Kota Nakajima, Licheng Jiao, Lin Ma, Lizhi Wang, Luping Wang, Menglong Li, Mengying Zhou, Mohamed Nasr, Mohamed Abdelwahed, Mykola Liashuha, Nikolay Falaleev, Norbert Oswald, Qiong Jia, Quoc-Cuong Pham, Ran Song, Romain Hérault, Rui Peng, Ruilong Chen, Ruixuan Liu, Ruslan Baikulov, Ryuto Fukushima, Sergio Escalera, Seungcheon Lee, Shimin Chen, Shouhong Ding, Taiga Someya, Thomas B. Moeslund, Tianjiao Li, Wei Shen, Wei zhang, Wei Li, Wei Dai, Weixin Luo, Wending Zhao, Wenjie Zhang, Xinquan Yang, Yanbiao Ma, Yeeun Joo, Yingsen Zeng, Yiyang Gan, Yongqiang Zhu, Yujie Zhong, Zheng Ruan, Zhiheng Li, Zhijian Huang, Ziyu Meng

More information on the tasks, challenges, and leaderboards are available on https://www. soccer-net. org.

Action Spotting Camera Calibration +3

Context-Aware 3D Object Localization from Single Calibrated Images: A Study of Basketballs

1 code implementation7 Sep 2023 Marcello Davide Caio, Gabriel Van Zandycke, Christophe De Vleeschouwer

Accurately localizing objects in three dimensions (3D) is crucial for various computer vision applications, such as robotics, autonomous driving, and augmented reality.

Autonomous Driving Camera Calibration +2

1st Workshop on Maritime Computer Vision (MaCVi) 2023: Challenge Results

no code implementations24 Nov 2022 Benjamin Kiefer, Matej Kristan, Janez Perš, Lojze Žust, Fabio Poiesi, Fabio Augusto de Alcantara Andrade, Alexandre Bernardino, Matthew Dawkins, Jenni Raitoharju, Yitong Quan, Adem Atmaca, Timon Höfer, Qiming Zhang, Yufei Xu, Jing Zhang, DaCheng Tao, Lars Sommer, Raphael Spraul, Hangyue Zhao, Hongpu Zhang, Yanyun Zhao, Jan Lukas Augustin, Eui-ik Jeon, Impyeong Lee, Luca Zedda, Andrea Loddo, Cecilia Di Ruberto, Sagar Verma, Siddharth Gupta, Shishir Muralidhara, Niharika Hegde, Daitao Xing, Nikolaos Evangeliou, Anthony Tzes, Vojtěch Bartl, Jakub Špaňhel, Adam Herout, Neelanjan Bhowmik, Toby P. Breckon, Shivanand Kundargi, Tejas Anvekar, Chaitra Desai, Ramesh Ashok Tabib, Uma Mudengudi, Arpita Vats, Yang song, Delong Liu, Yonglin Li, Shuman Li, Chenhao Tan, Long Lan, Vladimir Somers, Christophe De Vleeschouwer, Alexandre Alahi, Hsiang-Wei Huang, Cheng-Yen Yang, Jenq-Neng Hwang, Pyong-Kun Kim, Kwangju Kim, Kyoungoh Lee, Shuai Jiang, Haiwen Li, Zheng Ziqiang, Tuan-Anh Vu, Hai Nguyen-Truong, Sai-Kit Yeung, Zhuang Jia, Sophia Yang, Chih-Chung Hsu, Xiu-Yu Hou, Yu-An Jhang, Simon Yang, Mau-Tsuen Yang

The 1$^{\text{st}}$ Workshop on Maritime Computer Vision (MaCVi) 2023 focused on maritime computer vision for Unmanned Aerial Vehicles (UAV) and Unmanned Surface Vehicle (USV), and organized several subchallenges in this domain: (i) UAV-based Maritime Object Detection, (ii) UAV-based Maritime Object Tracking, (iii) USV-based Maritime Obstacle Segmentation and (iv) USV-based Maritime Obstacle Detection.

Object object-detection +2

Body Part-Based Representation Learning for Occluded Person Re-Identification

2 code implementations7 Nov 2022 Vladimir Somers, Christophe De Vleeschouwer, Alexandre Alahi

Firstly, individual body part appearance is not as discriminative as global appearance (two distinct IDs might have the same local appearance), this means standard ReID training objectives using identity labels are not adapted to local feature learning.

Human Parsing Part-based Representation Learning +3

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

Forward Error Correction applied to JPEG-XS codestreams

no code implementations11 Jul 2022 Antoine Legrand, Benoît Macq, Christophe De Vleeschouwer

JPEG-XS offers low complexity image compression for applications with constrained but reasonable bit-rate, and low latency.

Image Compression

Accelerating the creation of instance segmentation training sets through bounding box annotation

no code implementations23 May 2022 Niels Sayez, Christophe De Vleeschouwer

Various strategies are then investigated to balance the human manual annotation resources between bounding-box definition and mask correction, including when the correction of instance masks is prioritized based on their overlap with other instance bounding-boxes, or the outcome of an instance segmentation model trained on a partially annotated dataset.

Instance Segmentation Object +2

Ball 3D Localization From A Single Calibrated Image

2 code implementations30 Mar 2022 Gabriel Van Zandycke, Christophe De Vleeschouwer

In this work, we propose to address the task on a single image from a calibrated monocular camera by estimating ball diameter in pixels and use the knowledge of real ball diameter in meters.

DeepSportLab: a Unified Framework for Ball Detection, Player Instance Segmentation and Pose Estimation in Team Sports Scenes

1 code implementation1 Dec 2021 Seyed Abolfazl Ghasemzadeh, Gabriel Van Zandycke, Maxime Istasse, Niels Sayez, Amirafshar Moshtaghpour, Christophe De Vleeschouwer

In addition to the increased complexity resulting from the multiplication of single-task models, the use of the off-the-shelf models also impedes the performance due to the complexity and specificity of the team sports scenes, such as strong occlusion and motion blur.

Instance Segmentation Pose Estimation +3

Ordinal Pooling

1 code implementation3 Sep 2021 Adrien Deliège, Maxime Istasse, Ashwani Kumar, Christophe De Vleeschouwer, Marc Van Droogenbroeck

More importantly, they also demonstrate that ordinal pooling leads to consistent improvements in the accuracy over average- or max-pooling operations while speeding up the training and alleviating the issue of the choice of the pooling operations and activation functions to be used in the networks.

Intraclass clustering: an implicit learning ability that regularizes DNNs

1 code implementation ICLR 2021 Carbonnelle Simon, Christophe De Vleeschouwer

Several works have shown that the regularization mechanisms underlying deep neural networks' generalization performances are still poorly understood.

Clustering Data Augmentation

Improved anomaly detection by training an autoencoder with skip connections on images corrupted with Stain-shaped noise

1 code implementation29 Aug 2020 Anne-Sophie Collin, Christophe De Vleeschouwer

In industrial vision, the anomaly detection problem can be addressed with an autoencoder trained to map an arbitrary image, i. e. with or without any defect, to a clean image, i. e. without any defect.

Anomaly Detection

How semantic and geometric information mutually reinforce each other in ToF object localization

no code implementations27 Aug 2020 Antoine Vanderschueren, Victor Joos, Christophe De Vleeschouwer

We propose a novel approach to localize a 3D object from the intensity and depth information images provided by a Time-of-Flight (ToF) sensor.

Object Object Localization

Real-time CNN-based Segmentation Architecture for Ball Detection in a Single View Setup

2 code implementations23 Jul 2020 Gabriel Van Zandycke, Christophe De Vleeschouwer

This paper considers the task of detecting the ball from a single viewpoint in the challenging but common case where the ball interacts frequently with players while being poorly contrasted with respect to the background.

Data Augmentation Sports Ball Detection and Tracking

Adapting JPEG XS gains and priorities to tasks and contents

no code implementations18 May 2020 Benoit Brummer, Christophe De Vleeschouwer

Most current research in the domain of image compression focuses solely on achieving state of the art compression ratio, but that is not always usable in today's workflow due to the constraints on computing resources.

Image Compression

Associative Embedding for Game-Agnostic Team Discrimination

no code implementations1 Jul 2019 Maxime Istasse, Julien Moreau, Christophe De Vleeschouwer

Assigning team labels to players in a sport game is not a trivial task when no prior is known about the visual appearance of each team.

Natural Image Noise Dataset

3 code implementations1 Jun 2019 Benoit Brummer, Christophe De Vleeschouwer

We introduce the Natural Image Noise Dataset (NIND), a dataset of DSLR-like images with varying levels of ISO noise which is large enough to train models for blind denoising over a wide range of noise.

Benchmarking Image Denoising

Layer rotation: a surprisingly simple indicator of generalization in deep networks?

1 code implementation ICML Workshop Deep_Phenomen 2019 Simon Carbonnelle, Christophe De Vleeschouwer

Our work presents empirical evidence that layer rotation, i. e. the evolution across training of the cosine distance between each layer's weight vector and its initialization, constitutes an impressively consistent indicator of generalization performance.

An experimental study of layer-level training speed and its impact on generalization

no code implementations27 Sep 2018 Simon Carbonnelle, Christophe De Vleeschouwer

How optimization influences the generalization ability of a DNN is still an active area of research.

Layer rotation: a surprisingly powerful indicator of generalization in deep networks?

2 code implementations5 Jun 2018 Simon Carbonnelle, Christophe De Vleeschouwer

Our work presents extensive empirical evidence that layer rotation, i. e. the evolution across training of the cosine distance between each layer's weight vector and its initialization, constitutes an impressively consistent indicator of generalization performance.

I-HAZE: a dehazing benchmark with real hazy and haze-free indoor images

2 code implementations13 Apr 2018 Codruta O. Ancuti, Cosmin Ancuti, Radu Timofte, Christophe De Vleeschouwer

This represents an important advantage of the I-HAZE dataset that allows us to objectively compare the existing image dehazing techniques using traditional image quality metrics such as PSNR and SSIM.

Image Dehazing SSIM

O-HAZE: a dehazing benchmark with real hazy and haze-free outdoor images

1 code implementation13 Apr 2018 Codruta O. Ancuti, Cosmin Ancuti, Radu Timofte, Christophe De Vleeschouwer

Haze removal or dehazing is a challenging ill-posed problem that has drawn a significant attention in the last few years.

SSIM

Discovering the mechanics of hidden neurons

no code implementations ICLR 2018 Simon Carbonnelle, Christophe De Vleeschouwer

Neural networks trained through stochastic gradient descent (SGD) have been around for more than 30 years, but they still escape our understanding.

Cell segmentation with random ferns and graph-cuts

no code implementations17 Feb 2016 Arnaud Browet, Christophe De Vleeschouwer, Laurent Jacques, Navrita Mathiah, Bechara Saykali, Isabelle Migeotte

To isolate individual cells in live imaging data, we introduce an elegant image segmentation framework that effectively extracts cell boundaries, even in the presence of poor edge details.

Cell Segmentation Image Segmentation +1

Iterative hypothesis testing for multi-object tracking in presence of features with variable reliability

no code implementations1 Sep 2015 Amit Kumar K. C., Damien Delannay, Christophe De Vleeschouwer

This paper assumes prior detections of multiple targets at each time instant, and uses a graph-based approach to connect those detections across time, based on their position and appearance estimates.

Multi-Object Tracking Two-sample testing

Compressive Optical Deflectometric Tomography: A Constrained Total-Variation Minimization Approach

no code implementations4 Sep 2012 Adriana Gonzalez, Laurent Jacques, Christophe De Vleeschouwer, Philippe Antoine

Optical Deflectometric Tomography (ODT) provides an accurate characterization of transparent materials whose complex surfaces present a real challenge for manufacture and control.

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