Activity
Records of research presentations, awards, academic service, outreach, and laboratory activities.
Awards
6 awardsAwards received by our laboratory and students since April 2022.
- 2026.08.19
Best Presentation Award
60th Tokai Fuzzy Workshop (Gamaken 2026)
Recipient: Keisuke Hara and Hiroyasu Usami
View details - 2026.02.13
Excellence Award
NIBB-Chubu University Hackathon 2025
Recipient: Ayato Tsuboi, Keisuke Hara, Atsuki Kawaguchi, and Yuri Yokochi
View details - 2026.01.20
Encouragement Award
2025 Tokai-Section Joint Conference
Recipient: Hiroki Tominari
View details - 2024.09.24
Jury Award
HACK-Aichi 2024
Recipient: Chubu University Team A “Biz Mate”
View details - 2024.09.24
Corporate Award
HACK-Aichi 2024 (Toho Technology Corporation)
Recipient: Chubu University Team A “Biz Mate”
View details - 2024.02.18
Excellent Presentation Award
55th Tokai Fuzzy Workshop
Recipient: Reiya Fukuoka
View details
Recent Topics
2026.10.20PresentationGenerative AICollaboration
An arXiv preprint on auditing LLM-generated code under execution contracts is now available
We have released an arXiv preprint on candidate admission and task-level candidate selection under execution contracts. The public materials include a 34-page main text and 7-page ancillary material.
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2026.10.20PresentationInternational ConferenceMedical ImagingComputer VisionCollaboration
Presented colonoscopic monocular depth estimation research at ICMV 2026
We presented research on monocular depth estimation in colonoscopy using physical constraints and Privileged Illumination Information at ICMV 2026 in Budapest.
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2026.10.14PresentationGenerative AICollaboration
Dark Current code and supporting records are now available on GitHub
We have released the code and supporting records for the revised LLM Judges Have Dark Current study, conducted with Mitsubishi Heavy Industries, Research & Innovation Center. The repository includes the manuscript, recorded evaluation results, analysis code, and verification and reproduction instructions.
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2026.10.02Academic Service
Joined the Editorial Board of Scientific Reports
Hiroyasu Usami joined the Editorial Board of Scientific Reports, a Nature Portfolio journal, in September 2026, with a focus on computer vision, machine learning, and medical image analysis.
- Role: Editorial Board Member
- Appointment start: September 2026
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2026.09.02Academic ServiceGenerative AI
Serving as a reviewer for the NeurIPS 2026 Workshop TAE
Hiroyasu Usami is serving as a reviewer for the NeurIPS 2026 Workshop on Trustworthy AI Evaluation (TAE).
2026.08.31Conference OrganizationDomestic ConferenceMedical Imaging
Chaired the Medical and Welfare Support session at the Tokai-Section Joint Conference
I chaired the Medical and Welfare Support general session at the 2026 Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, facilitating presentations and discussion on information technologies for medical and welfare support.
- August 31, 2026, 14:15-16:15
- Room 2B (Building 41), Medical and Welfare Support general session
2026.08.30PresentationDomestic Conference
Kento Tsunogai and Wataru Hashizume presented two studies at the Tokai-Section Joint Conference
At the 2026 Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, held at Shizuoka University's Hamamatsu Campus on August 30, Kento Tsunogai presented dynamic BGP route control using an LLM with a verification mechanism, and Wataru Hashizume presented efficient 2D human pose estimation via token compression and cross-attention restoration.
- 2B-2-7: Dynamic BGP Route Control Based on Real-Time Performance Information Using an LLM with a Verification Mechanism
- Authors: Kento Tsunogai, Shugo Yamasaki, Kaito Kawabe, Hiroyasu Usami
- 1C-3-3: Efficient 2D Human Pose Estimation via Token Compression and Cross-Attention Restoration
- Authors: Wataru Hashizume, Hiroyasu Usami
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2026.08.27PresentationRegional CollaborationComputer Vision
Presented a cactus-focused 3D shape reconstruction demo at STATION Ai
At the Harutama Cafe event at STATION Ai, we presented “Reading Cactus Shape with Light,” applying inverse-rendering methods developed in medical imaging research to photographs of cacti. The demonstration introduced shape estimation and relighting from a single image, including a photo-booth-style 3D visualization experience for attendees.
- Venue: STATION Ai, 3rd floor
- Presenters: Hiroyasu Usami and Goto Cactus
- Title: Reading Cactus Shape with Light
2026.08.19PresentationAwardDomestic ConferenceMedical ImagingComputer Vision
Presented two studies at the 60th Tokai Fuzzy Workshop; Keisuke Hara received the Best Presentation Award
At the 60th Tokai Fuzzy Workshop in Toyohashi (Gamaken 2026), Keima Izuhara and I presented dermoscopic image classification research (S2-03), and Keisuke Hara and I presented single-image inverse rendering research (S3-03). Both papers are also included in the proceedings. The S3-03 presentation was recognized as the workshop's most outstanding research presentation, and Keisuke Hara received the Best Presentation Award. The first study examines complementary errors and the stability of lesion-wise selection across clinical-attribute fusion stages; the second evaluates joint estimation of reflectance, surface normals, and absolute depth under relighting constraints.
- S2-03: Lesion-Wise Selection of Clinical-Attribute Fusion Stages for Dermoscopic Image Classification (pp. 12-13)
- Authors: Keima Izuhara, Hiroyasu Usami
- S3-03: Reflectance Decomposition and 3D Shape Reconstruction via Self-Supervised Single-Image Inverse Rendering with Relighting Constraints (pp. 15-16, Best Presentation Award)
- Authors: Keisuke Hara, Hiroyasu Usami
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2026.08.06PresentationDomestic ConferenceComputer Vision
Presented 2D human pose estimation research at MIRU 2026
Wataru Hashizume and I presented research on 2D human pose estimation via compressed token learning with structural consistency in Interactive Session IS3 at MIRU 2026 on August 6, 13:00-15:00.
- 2D Human Pose Estimation via Compressed Token Learning with Structural Consistency
- Authors: Wataru Hashizume, Hiroyasu Usami
- Presentation ID: IS3-171, Paper ID: 366
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2026.06.30International ConferenceMedical ImagingComputer VisionCollaboration
A paper on physics-guided monocular depth estimation in colonoscopy was accepted at ICMV 2026
A paper introducing physical constraints and Privileged Illumination Information for monocular depth estimation from colonoscopic images was accepted at ICMV 2026. The presentation is scheduled for October 15-18, 2026, in Budapest.
- Physics-Guided Monocular Depth Estimation in Colonoscopy via Privileged Illumination Information
- Authors: Keisuke Hara, Ayato Tsuboi, Shinji Fukui, Shunsuke Kato, Satoshi Ono, Takuya Takahama, Masahide Ebi, Naotaka Ogasawara, Kunio Kasugai, Hiroyasu Usami
- Paper ID: M045; venue: Budapest, Hungary
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2026.06.14PublicationPresentationGenerative AICollaboration
An arXiv preprint on LLM judge reliability evaluation is now available
The preprint “LLM Judges Have Dark Current: A Psychometric Datasheet for LLM-as-a-Judge Evaluation” is now available on arXiv. The work treats LLM-as-a-judge systems as measurement instruments rather than scalar accuracy or agreement devices, and proposes a Judge Datasheet protocol for measuring dark current, positional bias, target sensitivity, and criterion shift.
- arXiv:2606.15610 [cs.CL]
- Authors: Hiroyasu Usami, Keisuke Hara, Ayato Tsuboi, Naohiko Matsuda
- Subject classes: cs.CL, astro-ph.IM, cs.AI, cs.LG
Related Links
2026.06.04PublicationMedical Imaging
A paper on an AI arteriosclerosis diagnosis system was published in Journal of Comprehensive Engineering
A paper on an AI arteriosclerosis diagnosis system using RLHF and adversarial attack was published in Vol. 38 of Journal of Comprehensive Engineering. The study evaluates the robustness of IMT extraction from carotid ultrasound images under adversarial perturbations, focusing on whether attention remains on physician-relevant structures.
- AI Arteriosclerosis Diagnosis System Using RLHF and Adversarial Attack: Quantitative Evaluation of IMT Extraction Robustness by Adversarial Learning
- Author: Hiroyasu Usami
- Journal of Comprehensive Engineering, Vol. 38, pp. 1-11, March 2026
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2026.04.01Academic ServiceIPSJ
Appointed as a representative member of the Information Processing Society of Japan
I became a representative member of the Information Processing Society of Japan for fiscal year 2026. I have been an IPSJ senior member since 2024 and served as an operating committee member and secretary of the Tokai Branch from April 2024 to June 2026.
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2026.03.07OutreachEducation
Served as a poster judge for the 8th Junior and Senior High School Informatics Research Contest
I served as a judge for informatics research poster presentations by junior and senior high school students, supporting exploratory research and education in informatics.
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2026.03.02International ConferenceMedical Imaging
Presented medical image segmentation research at BIOIMAGING 2026
We presented research on Stable Diffusion-based data augmentation for medical image segmentation. The study addresses generative-model use and evaluation design for small medical image datasets.
- Anatomy-Preserving Diffusion-Based Data Augmentation for Medical Image Segmentation
- Authors: Hiroki Tominari, Natsuki Nakayama, Naoko Arakawa, Hiroyasu Usami
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2026.02.13AwardEducation
Received an Excellence Award at the NIBB-Chubu University Hackathon 2025
Ayato Tsuboi, Keisuke Hara, Atsuki Kawaguchi, and Yuri Yokochi received an Excellence Award at the NIBB Hackathon 2025. Their project connected AI with biological images by reconstructing 3D models from citizen-science photographs.
- Result announcement: February 13, 2026
- Project title: Kawasemi is All You Need, second round: rapid 3D kingfisher morphology reconstruction using InstantMesh
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2026.01.23PresentationIoT and GNN
Presented building IoT simulation research at the EST Technical Committee
We presented research on computational optimization in building IoT simulation and physics-informed STGNNs, examining applications of spatiotemporal graph neural networks.
- O(V) Computational Optimization and Physics-informed STGNN for Building IoT Simulation
- Authors: Koichiro Tajima, Hiroyasu Usami
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2026.01.20AwardMedical Imaging
Hiroki Tominari received the 2025 Tokai-Section Joint Conference Encouragement Award
Hiroki Tominari received an Encouragement Award for his presentation on data augmentation for retinal image segmentation at the 2025 Tokai-Section Joint Conference.
- Title: Data augmentation for retinal image segmentation based on ground-truth masks
- Awardee: Hiroki Tominari
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2026.01.12OutreachEducation
Helped organize the Interesting Science Class at Nagoya University
As part of IPSJ Tokai Branch activities, I helped organize the Interesting Science Class at Nagoya University, an outreach event for science and informatics education.
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2025.12.07PresentationDomestic Conference
Presented three studies at WiNF 2025
We presented three studies on outdoor image processing, educational support, and evaluation of image generative AI, showing the laboratory breadth from image understanding to generative AI applications.
- Rain-effect Removal and Weather Estimation for Outdoor Images Using Rain Artifact Separation Learning
- Authors: Manato Kikuta, Wataru Hashizume, Hiroyasu Usami
- A Stabilization Method for Automatic Educational Question Generation Based on Self-consistency in Chain-of-Thought Reasoning
- Authors: Nayuta Shimotsuji, Hiroyasu Usami, Jin Nakane
- Verification of Semantic Biosynthesis in Image Generative AI Through a Modality Conversion-based Generation and Verification Cycle
- Authors: Keima Izuhara, Hiroki Tominari, Hiroyasu Usami
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2025.11.05Intellectual PropertyMedical Imaging
Obtained a patent related to endoscopic image conversion
We obtained a patent for an endoscopic image conversion device, system, and program. This result supports social implementation of medical image processing technology.
- Patent No. 7769330
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2025.09.18PresentationDomestic Conference
Presented two studies at the Tokai-Section Joint Conference
We presented studies on communication-log analysis and retinal image segmentation. The presentations covered time-series analysis using GNNs and data augmentation for medical image segmentation.
- Application of a Fully Connected Spatio-Temporal GNN Structure for Day-of-week Classification Based on Communication Logs
- Authors: Koichiro Tajima, Yuki Nakashima, Hiroyasu Usami
- Data Augmentation for Retinal Image Segmentation Based on Ground-truth Mask Images
- Authors: Hiroki Tominari, Hiroyasu Usami
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2025.09.18Conference OrganizationDomestic Conference
Organized and chaired sessions at the Tokai-Section Joint Conference
At the 2025 Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, I organized and chaired the OS6 planned session on natural speech dialogue systems and chaired a Media Processing session.
- OS6: Development and Challenges of Natural Speech Dialogue Systems, organizer and chair
- September 18, 13:30-15:15, Room H
- Media Processing session, chair
- September 19, 14:45-16:45, Room H (C3-301)
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2025.07.30PresentationComputer Vision
Presented inverse rendering research at MIRU 2025
We presented research on inverse rendering using single-view polarization cues and shape guidance under ambient light, addressing estimation of object shape and reflectance.
- Inverse Rendering Using Single-view Polarization Cues and Shape Guidance Under Ambient Light
- Authors: Ayato Tsuboi, Hiroyasu Usami
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2025.03.15OutreachEducation
Served as a poster judge for the 7th Junior and Senior High School Informatics Research Contest
I served as a judge for informatics research poster presentations by junior and senior high school students.
Related Links
2025.02.20International ConferenceMedical Imaging
Presented carotid ultrasound image analysis research at BIOIMAGING 2025
We presented a lightweight IMT region extraction method for mobile carotid ultrasound imaging using MobileNetV3 and SegNet.
- Efficient Automatic IMT Region Extraction Using MobileNetV3 and SegNet for Mobile Carotid Ultrasound Imaging
- Authors: Hiroyasu Usami, Natsuki Nakayama, Naoko Arakawa
Related Links
2025.01.13OutreachEducation
Helped organize the 2025 Interesting Science Class at Nagoya University
As part of IPSJ Tokai Branch activities, I helped organize the Interesting Science Class at Nagoya University for local pupils and students.
2024.09.24AwardEducation
Won a Jury Award and a Corporate Award at HACK-Aichi 2024
Yuui Ito, Daito Suzuki, Hiroki Tominari, Ayato Tsuboi, and Jin Nakane won a Jury Award and a Corporate Award at HACK-Aichi, an inter-university hackathon hosted by Aichi Prefecture.
- Project title: Biz Mate
Related Links
2024.08.28Conference OrganizationIPSJ
Organized a special session at the Tokai-Section Joint Conference
I organized a special session on understanding and applying AI technologies and chaired a Learning Support session at the 2024 Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering.
- Special session: organizer for a session on understanding and applying AI technologies
- August 29, H venue, Engineering 106, 10:00-12:00, Learning Support: session chair
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2024.08.05PresentationMedical Imaging
Presented IMT segmentation research at the 56th Tokai Fuzzy Workshop
We presented research on IMT region segmentation in carotid ultrasound images using SegNet, addressing lightweight segmentation for medical image analysis.
- SegNet-based IMT Region Segmentation in Carotid Ultrasound Images
- Authors: Mizuki Doi, Hiroyasu Usami, Natsuki Nakayama, Naoko Arakawa
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2024.07.25Regional CollaborationEducation
Gave a data-utilization seminar at the Kasugai Chamber of Commerce and Industry
I lectured on data utilization and AI for local businesses at a seminar hosted by the commercial division of the Kasugai Chamber of Commerce and Industry.
2024.04.01Academic ServiceIPSJ
Participating in IPSJ Tokai Branch operations
I served as an operating committee member and secretary of the IPSJ Tokai Branch from April 2024 to June 2026. I have also been an IPSJ senior member since 2024.
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2024.02.18PresentationGenerative AIAward
Presented image generative AI research and received an Excellent Presentation Award at the 55th Tokai Fuzzy Workshop
We presented research on purpose-oriented prompts for image generative AI, and Reiya Fukuoka received an Excellent Presentation Award.
- A Study of Purpose-oriented Prompts for Image Generative AI
- Authors: Reiya Fukuoka, Hiroki Tominari, Hiroyasu Usami, Yuji Iwahori
- Award: Excellent Presentation Award, awardee: Reiya Fukuoka
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2023.12.10PresentationDomestic Conference
Presented two studies at WiNF 2023
We presented research on dangerous worker-action recognition and prompt evaluation for Stable Diffusion-based image generative AI.
- Image Processing-based Support System for Recognizing Dangerous Worker Actions and Preventing Machine Accidents
- Authors: Wataru Hashizume, Hiroyasu Usami, Yusuke Noguchi, Hiroyuki Tsuchida, Yuji Iwahori
- Research and Evaluation of Effective Prompts for Stable Diffusion-based AI Image Generation Tools
- Authors: Hiroki Tominari, Reiya Fukuoka, Hiroyasu Usami
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2023.11.30Invited TalkOutreach
Gave an invited talk in a special session at MWE 2023
I gave an invited talk in the Microwave Workshop and Exhibition 2023 special session on future and foundational technologies, reviewing the technical transition from AI to machine learning and deep learning.
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2023.04.01Collaboration
Joined a collaborative mHealth research project in rural Thailand
I joined a KAKENHI research project on developing an mHealth application to improve follow-up for patients with lifestyle-related diseases in rural Thailand.
2023.01.27PresentationComputer Vision
Presented biomass ash sample image-analysis research at the EST Technical Committee
We presented research on extracting sample regions from biomass ash dissolution image data using time-series information.
- Sample-region Extraction in Biomass Ash Dissolution Image Data Using Time-series Information
- Authors: Haruki Yamane, Hiroyasu Usami, Yuri Suzuki, Yoshihiko Ninomiya
2022.12.17PresentationDomestic Conference
Presented four studies at WiNF 2022
We presented four studies on generative AI, edge computing, medical image analysis, and coal image analysis.
- A Text-to-image Model Considering Latent Information Specific to Japanese
- Authors: Reiya Fukuoka, Daiki Yamazaki, Haruki Yamane, Hiroyasu Usami, Yuri Suzuki
- Adaptive Virtualization Environment Using Edge Computing
- Authors: Yuto Hayashi, Haruki Yamane, Hiroyasu Usami
- Segmentation of Laterally Spreading Tumors Using an Attention Mechanism
- Authors: Mizuki Doi, Hiroyasu Usami, Yuji Iwahori, Naotaka Ogasawara, Kunio Kasugai
- Coal Image Segmentation Using an Attention Mechanism Considering Relationships Between Coal and Included Minerals
- Authors: Koichiro Tajima, Mizuki Doi, Hiroyasu Usami, Yoshihiko Ninomiya
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2022.09.29Invited TalkOutreach
Gave an invited talk at an information exchange meeting hosted by Tohoku Electric Power Engineering and Construction and Tohoku Ryokka Environmental Preservation
I gave a lecture on the technical transition from artificial intelligence to machine learning and deep learning from the perspective of image processing.
2022.04.01Lab Activity
Usami Laboratory was founded
Usami Laboratory was founded on April 1, 2022, starting research activities around light, image understanding, and medical applications.