1 code implementation • 10 Mar 2025 • Calvin Yeung, Tomohiro Suzuki, Ryota Tanaka, Zhuoer Yin, Keisuke Fujii
Human pose estimation is a critical task in computer vision and sports biomechanics, with applications spanning sports science, rehabilitation, and biomechanical research.
4 code implementations • 5 Feb 2025 • Calvin Yeung, Kenjiro Ide, Taiga Someya, Keisuke Fujii
OpenSTARLab includes the Pre-processing Package that standardizes event and tracking data through Unified and Integrated Event Data and State-Action-Reward formats, the Event Modeling Package that implements deep learning-based event prediction, alongside the RLearn Package for reinforcement learning tasks.
1 code implementation • 24 Jan 2025 • Calvin Yeung, Jeff Yu, King Chau Cheung, Tat Wing Wong, Chun Man Chan, Kin Chi Wong, Keisuke Fujii
Automated grading has become an essential tool in education technology due to its ability to efficiently assess large volumes of student work, provide consistent and unbiased evaluations, and deliver immediate feedback to enhance learning.
no code implementations • 16 Jan 2025 • Haobin Qin, Calvin Yeung, Rikuhei Umemoto, Keisuke Fujii
Our work demonstrates the potential of synthetic datasets to replace real datasets for algorithm training in the field of soccer video analysis.
no code implementations • 9 Dec 2024 • Li Yin, Calvin Yeung, Qingrui Hu, Jun Ichikawa, Hirotsugu Azechi, Susumu Takahashi, Keisuke Fujii
While pedestrian tracking has advanced with Tracking-by-Detection MOT, team sports like basketball pose unique challenges.
1 code implementation • 14 Sep 2024 • Yan Feng, Alexander Carballo, Keisuke Fujii, Robin Karlsson, Ming Ding, Kazuya Takeda
These limitations are tackled accordingly through the following approaches: 1) a linear aggregator to integrate the activation results of the concepts into predictions, which associates concepts of different modalities and provides ante-hoc explanations of the relevance between the concepts and the predictions; 2) a channel-wise recalibration module that attends to local spatiotemporal regions, which enables the concepts with locality; 3) a feature regularization loss that encourages the concepts to learn diverse patterns.
1 code implementation • 3 Sep 2024 • Shunsuke Iwashita, Atom Scott, Rikuhei Umemoto, Ning Ding, Keisuke Fujii
A distinctive aspect of Ultimate is that the player holding the disc is unable to move, underscoring the significance of creating space to receive passes.
1 code implementation • 29 Aug 2024 • Ryota Tanaka, Tomohiro Suzuki, Keisuke Fujii
In the experimental results, we validated the usefulness of 3D pose features as input and the fine-grained dataset for the TAS model in figure skating.
no code implementations • 28 Jun 2024 • Qingrui Hu, Atom Scott, Calvin Yeung, Keisuke Fujii
Recent deep learning-based object detection approaches have led to significant progress in multi-object tracking (MOT) algorithms.
1 code implementation • 13 Jun 2024 • Rikako Kono, Keisuke Fujii
The BMOS model adapts principles from the Off-Ball Scoring Opportunities (OBSO) model, originally designed for soccer, to basketball, whereas the BIMOS model also incorporates the likelihood of interception during ball movements.
1 code implementation • 20 May 2024 • Calvin Yeung, Kenjiro Ide, Keisuke Fujii
The dataset, code, and models are available at: https://github. com/calvinyeungck/3D-Shot-Posture-Dataset.
no code implementations • 22 Apr 2024 • Atom Scott, Ikuma Uchida, Ning Ding, Rikuhei Umemoto, Rory Bunker, Ren Kobayashi, Takeshi Koyama, Masaki Onishi, Yoshinari Kameda, Keisuke Fujii
Multi-object tracking (MOT) is a critical and challenging task in computer vision, particularly in situations involving objects with similar appearances but diverse movements, as seen in team sports.
no code implementations • 12 Mar 2024 • Rory Bunker, Calvin Yeung, Keisuke Fujii
The aim of this chapter is to give a broad overview of the current state and potential future developments in machine learning for soccer match results prediction, as a resource for those interested in conducting future studies in the area.
no code implementations • 4 Mar 2024 • Kazuhiro Yamada, Keisuke Fujii
This study employs two methods to capture the playing styles of players on offense: shooting style clustering using tracking data, and offensive role clustering based on annotated playtypes and advanced statistics.
no code implementations • 15 Feb 2024 • Jiale Fang, Calvin Yeung, Keisuke Fujii
Recent advances in computer vision have made significant progress in tracking and pose estimation of sports players.
no code implementations • 1 Dec 2023 • Yoshiaki Kawase, Kosuke Mitarai, Keisuke Fujii
Since quantum states are higher dimensional objects that can only be seen via observables, our visualization method, which inherits the similarity of quantum data, would be useful in understanding the behavior of quantum circuits and algorithms.
no code implementations • 29 Nov 2023 • Kohei Morimoto, Yusuke Takase, Kosuke Mitarai, Keisuke Fujii
In this paper, we introduce the quantum adaptive distribution search (QuADS), a quantum continuous optimization algorithm that integrates Grover adaptive search (GAS) with the covariance matrix adaptation - evolution strategy (CMA-ES), a classical technique for continuous optimization.
no code implementations • 11 Nov 2023 • Yingjie Niu, Ming Ding, Keisuke Fujii, Kento Ohtani, Alexander Carballo, Kazuya Takeda
The DRUformer is a transformer-based multi-modal important object detection model that takes into account the relationships between all the participants in the driving scenario.
1 code implementation • 18 Oct 2023 • Tomohiro Suzuki, Kazushi Tsutsui, Kazuya Takeda, Keisuke Fujii
However, most of the current studies on player re-identification in multi- or single-view sports videos focus on re-identification in the closed-world setting using labeled image dataset, and player re-identification in the open-world setting for automatic video analysis is not well developed.
1 code implementation • 26 Sep 2023 • Calvin Yeung, Rory Bunker, Rikuhei Umemoto, Keisuke Fujii
The original training set of matches and features, which was provided for the competition, was augmented with additional matches that were played between 4 April and 13 April 2023, representing the period after which the training set ended, but prior to the first matches that were to be predicted (upon which the performance was evaluated).
2 code implementations • 27 Jul 2023 • Calvin C. K. Yeung, Keisuke Fujii
To address this issue, we proposed a novel framework to analyze such scenarios based on game theory, where we estimate the expected payoff with machine learning (ML) models, and additional features for ML models were extracted with a theory-based shot block model.
1 code implementation • 29 Jun 2023 • Leonardo Placidi, Ryuichiro Hataya, Toshio Mori, Koki Aoyama, Hayata Morisaki, Kosuke Mitarai, Keisuke Fujii
In fact, also the Machine Learning research related to quantum computers undertakes a dual challenge: enhancing machine learning exploiting the power of quantum computers, while also leveraging state-of-the-art classical machine learning methodologies to help the advancement of quantum computing.
noisy quantum circuit classification (quantum ML, error mitigation)
quantum circuit classification (classical ML)
+1
no code implementations • 29 May 2023 • Hiroshi Nakahara, Kazushi Tsutsui, Kazuya Takeda, Keisuke Fujii
In this paper, we propose a method of valuing possible actions for on- and off-ball soccer players in a single holistic framework based on multi-agent deep reinforcement learning.
no code implementations • 22 May 2023 • Keisuke Fujii, Kazushi Tsutsui, Atom Scott, Hiroshi Nakahara, Naoya Takeishi, Yoshinobu Kawahara
In the experiments, using chase-and-escape and football tasks with the different dynamics between the unknown source and target environments, we show that our approach achieved a balance between the reproducibility and the generalization ability compared with the baselines.
1 code implementation • 7 May 2023 • Ning Ding, Kazuya Takeda, Wenhui Jin, Yingjiu Bei, Keisuke Fujii
In this work, we present the first annotated drone dataset from top and back views in badminton doubles and propose a framework to estimate the control area probability map, which can be used to evaluate teamwork performance.
1 code implementation • 26 Apr 2023 • Robin Karlsson, Alexander Carballo, Francisco Lepe-Salazar, Keisuke Fujii, Kento Ohtani, Kazuya Takeda
We demonstrate how to infer global navigational patterns by fitting a maximum likelihood graph to the DSLP field.
Ranked #1 on
Lane Detection
on nuScenes
1 code implementation • 18 Feb 2023 • Calvin C. K. Yeung, Tony Sit, Keisuke Fujii
However, most sports sequential events modeling methods and performance metrics approaches could be incomprehensive in dealing with such large-scale spatiotemporal data (in particular, temporal process), thereby necessitating a more comprehensive spatiotemporal model and a holistic performance metric.
1 code implementation • 12 Jan 2023 • Robin Karlsson, Alexander Carballo, Keisuke Fujii, Kento Ohtani, Kazuya Takeda
By extending HVAEs to cases where complete ground truth states do not exist, we facilitate continual learning of spatial prediction as a step towards realizing explainable and comprehensive predictive world models for real-world mobile robotics applications.
1 code implementation • 30 Nov 2022 • Rikuhei Umemoto, Kazushi Tsutsui, Keisuke Fujii
Using the open-source location data of all players in broadcast video frames in football games of men's Euro 2020 and women's Euro 2022, we investigated the effect of the number of players on the prediction and validated our approach by analyzing the games.
1 code implementation • 24 Aug 2022 • Tomohiro Suzuki, Kazuya Takeda, Keisuke Fujii
We also revealed that the machine learning model detects faults according to the rules of race walking.
1 code implementation • Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) Workshops 2022 • Atom Scott, Ikuma Uchida, Masaki Onishi, Yoshinari Kameda, Kazuhiro Fukui, Keisuke Fujii
Finally, we evaluate the tracking accuracy among a GNSS, fish-eye camera and drone camera data.
1 code implementation • 4 Jun 2022 • Masakiyo Teranishi, Kazushi Tsutsui, Kazuya Takeda, Keisuke Fujii
However, it has remained difficult to evaluate an attacking player without receiving the ball, and to reveal how movement contributes to the creation of scoring opportunities for teammates.
no code implementations • 4 Jun 2022 • Keisuke Fujii, Koh Takeuchi, Atsushi Kuribayashi, Naoya Takeishi, Yoshinobu Kawahara, Kazuya Takeda
Evaluation of intervention in a multiagent system, e. g., when humans should intervene in autonomous driving systems and when a player should pass to teammates for a good shot, is challenging in various engineering and scientific fields.
no code implementations • 4 Jun 2022 • Hiroshi Nakahara, Kazuya Takeda, Keisuke Fujii
The weighted on base average (wOBA) is well known as a measure of an batter's hitting contribution.
no code implementations • 9 Feb 2022 • Yoshiaki Kawase, Kosuke Mitarai, Keisuke Fujii
In this paper, we propose to use quantum neural networks for parametric t-SNE to reflect the characteristics of high-dimensional quantum data on low-dimensional data.
1 code implementation • 24 Nov 2021 • Robin Karlsson, Tomoki Hayashi, Keisuke Fujii, Alexander Carballo, Kento Ohtani, Kazuya Takeda
Recent self-supervised models have demonstrated equal or better performance than supervised methods, opening for AI systems to learn visual representations from practically unlimited data.
no code implementations • 24 Nov 2021 • Atom Scott, Keisuke Fujii, Masaki Onishi
Recent advances in reinforcement learning (RL) have made it possible to develop sophisticated agents that excel in a wide range of applications.
no code implementations • 4 Nov 2021 • Norihito Shirai, Kenji Kubo, Kosuke Mitarai, Keisuke Fujii
In this work, we explore a quantum machine learning model with a deep parameterized quantum circuit and aim to go beyond the conventional quantum kernel method.
1 code implementation • NeurIPS 2021 • Keisuke Fujii, Naoya Takeishi, Kazushi Tsutsui, Emyo Fujioka, Nozomi Nishiumi, Ryoya Tanaka, Mika Fukushiro, Kaoru Ide, Hiroyoshi Kohno, Ken Yoda, Susumu Takahashi, Shizuko Hiryu, Yoshinobu Kawahara
In this paper, we propose a new framework for learning Granger causality from multi-animal trajectories via augmented theory-based behavioral models with interpretable data-driven models.
no code implementations • 17 Mar 2021 • Kosuke Toda, Masakiyo Teranishi, Keisuke Kushiro, Keisuke Fujii
Results show that the proposed classifiers predicted the true events (mean F1 score $>$ 0. 483) better than the existing classifiers which were based on rare events or goals (mean F1 score $<$ 0. 201).
no code implementations • 19 Feb 2021 • Naoya Takeishi, Keisuke Fujii, Koh Takeuchi, Yoshinobu Kawahara
Extracting coherent patterns is one of the standard approaches towards understanding spatio-temporal data.
no code implementations • 15 Feb 2021 • Keisuke Fujii
This survey focuses on data-driven analysis for quantitative understanding of invasion team sports behaviors such as basketball and football, and introduces two main approaches for understanding such multi-agent behaviors: (1) extracting easily interpretable features or rules from data and (2) generating and controlling behaviors in visually-understandable ways.
1 code implementation • 16 Dec 2020 • M. Cerezo, Andrew Arrasmith, Ryan Babbush, Simon C. Benjamin, Suguru Endo, Keisuke Fujii, Jarrod R. McClean, Kosuke Mitarai, Xiao Yuan, Lukasz Cincio, Patrick J. Coles
Applications such as simulating complicated quantum systems or solving large-scale linear algebra problems are very challenging for classical computers due to the extremely high computational cost.
1 code implementation • 29 Oct 2020 • Rory Bunker, Keisuke Fujii, Hiroyuki Hanada, Ichiro Takeuchi
Given a set of sequences comprised of time-ordered events, sequential pattern mining is useful to identify frequent subsequences from different sequences or within the same sequence.
no code implementations • 8 Oct 2020 • Yasunari Suzuki, Suguru Endo, Keisuke Fujii, Yuuki Tokunaga
In the early years of fault-tolerant quantum computing (FTQC), it is expected that the available code distance and the number of magic states will be restricted due to the limited scalability of quantum devices and the insufficient computational power of classical decoding units.
Quantum Physics
1 code implementation • 7 Jul 2020 • Keisuke Fujii, Naoya Takeishi, Yoshinobu Kawahara, Kazuya Takeda
Extracting the rules of real-world multi-agent behaviors is a current challenge in various scientific and engineering fields.
1 code implementation • 28 May 2020 • Katsuhiro Endo, Taichi Nakamura, Keisuke Fujii, Naoki Yamamoto
The self-learning Metropolis-Hastings algorithm is a powerful Monte Carlo method that, with the help of machine learning, adaptively generates an easy-to-sample probability distribution for approximating a given hard-to-sample distribution.
Quantum Physics
1 code implementation • 24 May 2020 • Keisuke Fujii, Julian C. Berengut
We show that the distribution of $\gamma$-decay intensities from heavy nuclei follows a power law.
Nuclear Theory
1 code implementation • 21 May 2020 • Shunsuke Kanda, Koh Takeuchi, Keisuke Fujii, Yasuo Tabei
To address this problem, we present the trajectory-indexing succinct trit-array trie (tSTAT), which is a scalable method leveraging LSH for trajectory similarity searches.
1 code implementation • 13 May 2019 • Keisuke Fujii, Naoya Takeishi, Motokazu Hojo, Yuki Inaba, Yoshinobu Kawahara
A fundamental question addressed here pertains to the classification of collective motion network based on physically-interpretable dynamical properties.
no code implementations • 5 Mar 2019 • Philip Bambade, Tim Barklow, Ties Behnke, Mikael Berggren, James Brau, Philip Burrows, Dmitri Denisov, Angeles Faus-Golfe, Brian Foster, Keisuke Fujii, Juan Fuster, Frank Gaede, Paul Grannis, Christophe Grojean, Andrew Hutton, Benno List, Jenny List, Shinichiro Michizono, Akiya Miyamoto, Olivier Napoly, Michael Peskin, Roman Poeschl, Frank Simon, Jan Strube, Junping Tian, Maksym Titov, Marcel Vos, Andrew White, Graham Wilson, Akira Yamamoto, Hitoshi Yamamoto, Kaoru Yokoya
In this report, we review of all aspects of the ILC program: the physics motivation, the accelerator design, the run plan, the proposed detectors, the experimental measurements on the Higgs boson, the top quark, the couplings of the W and Z bosons, and searches for new particles.
High Energy Physics - Experiment High Energy Physics - Phenomenology Accelerator Physics
no code implementations • 31 Dec 2018 • Kosuke Mitarai, Keisuke Fujii
However, in certain cases, the indirect measurement can be reduced to the direct measurement, where a quantum state is destructively measured.
Quantum Physics
1 code implementation • 30 Aug 2018 • Keisuke Fujii, Yoshinobu Kawahara
In this paper, we formulate Koopman spectral analysis for NLDSs with structures among observables and propose an estimation algorithm for this problem.
no code implementations • 3 Aug 2018 • Keisuke Fujii, Chihiro Suzuki, Masahiro Hasuo
The first step to realize automatic experimental data analysis for fusion plasma experiments is fitting noisy data of temperature and density spatial profiles, which are obtained routinely.
2 code implementations • NeurIPS 2018 • Isao Ishikawa, Keisuke Fujii, Masahiro Ikeda, Yuka Hashimoto, Yoshinobu Kawahara
The development of a metric for structural data is a long-term problem in pattern recognition and machine learning.
5 code implementations • 2 Mar 2018 • Kosuke Mitarai, Makoto Negoro, Masahiro Kitagawa, Keisuke Fujii
Hybridizing a low-depth quantum circuit and a classical computer for machine learning, the proposed framework paves the way toward applications of near-term quantum devices for quantum machine learning.
Quantum Physics
no code implementations • 1 Dec 2017 • Kosuke Fukui, Akihisa Tomita, Atsushi Okamoto, Keisuke Fujii
To reduce this requirement, we propose a high-threshold fault-tolerant quantum computation with GKP qubits using topologically protected measurement-based quantum computation with the surface code.
Quantum Physics
1 code implementation • 27 Oct 2016 • Alexander G. de G. Matthews, Mark van der Wilk, Tom Nickson, Keisuke Fujii, Alexis Boukouvalas, Pablo León-Villagrá, Zoubin Ghahramani, James Hensman
GPflow is a Gaussian process library that uses TensorFlow for its core computations and Python for its front end.
no code implementations • 26 Feb 2016 • Keisuke Fujii, Kohei Nakajima
Quantum computer has an amazing potential of fast information processing.