Yafei Ou

I am now a Researcher at AI Computing Team, RIKEN AIP, hosted by Prof. Shinya Takamaeda. I got my Ph.D. degree from Graduate School of Information Science and Technology, Hokkaido University in March 2023, supervised by Prof. Masayuki Ikebe.

My main interests are in Computer-aided Diagnosis, Multi-modal, and Computer Vision.

We are seeking collaborations in rheumatoid arthritis [link].

Publications Featured By topic

( ^* Equal Contribution and ^# Corresponding Author)

RAM-H1200: A unified evaluation and dataset on hand radiographs for rheumatoid arthritis

Songxiao Yang^*, Haolin Wang^*, Yao Fu^*, Junmu Peng, Lin Fan, Hongruixuan Chen, Jian Song, Masayuki Ikebe, Shinya Takamaeda-Yamazaki, Masatoshi Okutomi, Tamotsu Kamishima, Yafei Ou^#.
In Annual Conference on Neural Information Processing Systems (NeurIPS) (acceptance rate: 25.8%), December 06, 2026.

OFBD: Object-Focused Background Debiasing for Long-Tailed Learning

Shenghan Chen, Yiming Liu, Zhipeng Deng, Haolin Wang, Jiale Zhou, Zhijian Wu, Xiankai Lu, Yafei Ou^#, Yefeng Zheng^#.
In Annual Conference on Neural Information Processing Systems (NeurIPS) (acceptance rate: 25.7%), December 06, 2026.

PipeMFL-240K: A Large-scale Dataset and Benchmark for Object Detection in Pipeline Magnetic Flux Leakage Imaging

Tianyi Qu^*, Songxiao Yang^*, Haolin Wang^*, Huadong Song, Xiaoting Guo, Wenguang Hu, Guanlin Liu, Honghe Chen, Yafei Ou^#.
In Annual ACM SIGKDD Conference (KDD) (acceptance rate: 29%), August 09, 2026.

Prompt-driven multi-instance CLIP: Aligning heterogeneous modalities with missing data tolerance for multi-modal medical analysis

Lin Fan^*, Yafei Ou^*^#, Cenyang Zheng, Xun Gong^#.
In Expert Systems with Applications (IF: 7.5), February 14, 2026.

RAM-W600: A Multi-Task Wrist Dataset and Benchmark for Rheumatoid Arthritis (NeurIPS 2025 Scholar Award)

Songxiao Yang^*, Haolin Wang^*, Yao Fu, Ye Tian, Tamotsu Kamishima, Masayuki Ikebe, Yafei Ou^#, Masatoshi Okutomi.
In Annual Conference on Neural Information Processing Systems (NeurIPS) (acceptance rate: 24.9%), December 02, 2025.

Layer Separation: Towards Adjustable Joint Space Width Images Synthesis

Haolin Wang, Yafei Ou^#, Prasoon Ambalathankandy, Gen Ota, Pengyu Dai, Masayuki Ikebe, Kenji Suzuki, Tamotsu Kamishima.
In ACM International Conference on Multimedia (ACM MM) (acceptance rate: 23.7%), October 27, 2025.

BLS-GAN: A Deep Layer Separation Framework for Eliminating Bone Overlap in Conventional Radiographs

Haolin Wang, Yafei Ou^#, Prasoon Ambalathankandy, Gen Ota, Pengyu Dai, Masayuki Ikebe, Kenji Suzuki, Tamotsu Kamishima.
In Annual AAAI Conference on Artificial Intelligence (AAAI) (acceptance rate: 23.4%), February 25, 2025.

A Sub-pixel Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis (Featured Article, Top 7% & Cover Article of Special Issue, 1/12) (2023 IEEE Sapporo Young Professionals Best Paper Award)

Yafei Ou, Prasoon Ambalathankandy, Ryunosuke Furuya, Seiya Kawada, Tianyu Zeng, Yujie An, Tamotsu Kamishima, Kenichi Tamura, Masayuki Ikebe^#.
In IEEE Journal of Biomedical and Health Informatics (IF: 6.8), October 27, 2022.

Real-Time Tone Mapping: A Survey and Cross-Implementation Hardware Benchmark

Yafei Ou, Prasoon Ambalathankandy, Shinya Takamaeda, Masato Motomura, Tetsuya Asai, Masayuki Ikebe^#.
In IEEE Transactions on Circuits and Systems for Video Technology (IF: 11.1), February 18, 2021.

Long-Tailed Learning

OFBD: Object-Focused Background Debiasing for Long-Tailed Learning

Computer-aided Diagnosis

RAM-H1200: A unified evaluation and dataset on hand radiographs for rheumatoid arthritis

RAM-W600: A Multi-Task Wrist Dataset and Benchmark for Rheumatoid Arthritis (NeurIPS 2025 Scholar Award)

A Sub-pixel Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis (Featured Article, Top 7% & Cover Article of Special Issue, 1/12) (2023 IEEE Sapporo Young Professionals Best Paper Award)

AP-DPM: A Dual-Path Merging Network via Adversarial Anatomical Prior Guidance for Wrist Bone Segmentation (BIBM2025 Student Travel Grant)

Songxiao Yang, Haolin Wang, Masayuki Ikebe, Tamotsu Kamishima, Yafei Ou^#, Masatoshi Okutomi.
In IEEE International Conference on Bioinformatics and Biomedicine (IEEE BIBM), December 15, 2025.

A Deep Registration Method for Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis

Haolin Wang^*, Yafei Ou^*^#, Wanxuan Fang, Prasoon Ambalathankandy, Naoto Goto, Gen Ota, Taichi Okino, Jun Fukae, Kenneth Sutherland, Masayuki Ikebe, Tamotsu Kamishima.
In Computerized Medical Imaging and Graphics (IF: 4.9), July 15, 2023.

PipeMFL-240K: A Large-scale Dataset and Benchmark for Object Detection in Pipeline Magnetic Flux Leakage Imaging

Multi-modal

Prompt-driven multi-instance CLIP: Aligning heterogeneous modalities with missing data tolerance for multi-modal medical analysis

Lin Fan^*, Yafei Ou^*^#, Cenyang Zheng, Xun Gong^#.
In Expert Systems with Applications (IF: 7.5), February 14, 2026.

Synthetic Data

Layer Separation: Towards Adjustable Joint Space Width Images Synthesis

BLS-GAN: A Deep Layer Separation Framework for Eliminating Bone Overlap in Conventional Radiographs

Real-Time Tone Mapping: A Survey and Cross-Implementation Hardware Benchmark

Medical Visual Question Answering

GoCa: Trustworthy Multi-Modal RAG with Explicit Thinking Distillation for Reliable Decision-Making in Med-LVLMs

Pengyu Dai, Yafei Ou^#, Yuqiao Yang, Ze Jin, Kenji Suzuki.
In International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI) (acceptance rate: 30%), September 27, 2025.

Cycle-VQA: A Cycle-Consistent Framework for Robust Medical Visual Question Answering

Lin Fan, Xun Gong^#, Cenyang Zheng, Xuli Tan, Jiao Li, Yafei Ou.
In Pattern Recognition (IF: 7.6), March 13, 2025.

Tri-VQA: Triangular Reasoning Medical Visual Question Answering for Multi-Attribute Analysis

Lin Fan, Xun Gong, Cenyang Zheng, Yafei Ou^#.
In IEEE International Conference on Bioinformatics and Biomedicine (IEEE BIBM), December 03, 2024.

MRI Reconstruction

Domain Adaptation

Award

NeurIPS 2025 Scholar Award, NeurIPS, December 2025.

2023 IEEE Sapporo Young Professionals Best Paper Award, IEEE Sapporo Young Professionals, July 2023.

Featured Article (Top 7%), IEEE Journal of Biomedical and Health Informatics, January 2023.

Cover Article of Special Issue (1/12), IEEE Journal of Biomedical and Health Informatics, January 2023.

Academic Service

Senior Program Committee

Annual AAAI Conference on Artificial Intelligence (AAAI)

Publications Featured By topic

RAM-H1200: A unified evaluation and dataset on hand radiographs for rheumatoid arthritis

OFBD: Object-Focused Background Debiasing for Long-Tailed Learning

PipeMFL-240K: A Large-scale Dataset and Benchmark for Object Detection in Pipeline Magnetic Flux Leakage Imaging

Prompt-driven multi-instance CLIP: Aligning heterogeneous modalities with missing data tolerance for multi-modal medical analysis

RAM-W600: A Multi-Task Wrist Dataset and Benchmark for Rheumatoid Arthritis (NeurIPS 2025 Scholar Award)

Layer Separation: Towards Adjustable Joint Space Width Images Synthesis

BLS-GAN: A Deep Layer Separation Framework for Eliminating Bone Overlap in Conventional Radiographs

A Sub-pixel Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis (Featured Article, Top 7% & Cover Article of Special Issue, 1/12) (2023 IEEE Sapporo Young Professionals Best Paper Award)

Real-Time Tone Mapping: A Survey and Cross-Implementation Hardware Benchmark

Long-Tailed Learning

OFBD: Object-Focused Background Debiasing for Long-Tailed Learning

Computer-aided Diagnosis

RAM-H1200: A unified evaluation and dataset on hand radiographs for rheumatoid arthritis

RAM-W600: A Multi-Task Wrist Dataset and Benchmark for Rheumatoid Arthritis (NeurIPS 2025 Scholar Award)

A Sub-pixel Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis (Featured Article, Top 7% & Cover Article of Special Issue, 1/12) (2023 IEEE Sapporo Young Professionals Best Paper Award)

AP-DPM: A Dual-Path Merging Network via Adversarial Anatomical Prior Guidance for Wrist Bone Segmentation (BIBM2025 Student Travel Grant)

A Deep Registration Method for Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis

Computer-aided Engineering

PipeMFL-240K: A Large-scale Dataset and Benchmark for Object Detection in Pipeline Magnetic Flux Leakage Imaging

Multi-modal

Prompt-driven multi-instance CLIP: Aligning heterogeneous modalities with missing data tolerance for multi-modal medical analysis

Synthetic Data

Layer Separation: Towards Adjustable Joint Space Width Images Synthesis

BLS-GAN: A Deep Layer Separation Framework for Eliminating Bone Overlap in Conventional Radiographs

SaSaMIM: Synthetic Anatomical Semantics-Aware Masked Image Modeling for Colon Tumor Segmentation in Non-contrast Abdominal Computed Tomography

Tone Mapping

Real-Time Tone Mapping: A Survey and Cross-Implementation Hardware Benchmark

Medical Visual Question Answering

GoCa: Trustworthy Multi-Modal RAG with Explicit Thinking Distillation for Reliable Decision-Making in Med-LVLMs

Cycle-VQA: A Cycle-Consistent Framework for Robust Medical Visual Question Answering

Tri-VQA: Triangular Reasoning Medical Visual Question Answering for Multi-Attribute Analysis

MRI Reconstruction

PixelINR: Scan-specific self-supervised MRI reconstruction based on implicit neural representations

Domain Adaptation

Bi-directional Mutual Supervision for Adversarial Domain Adaptation in Medical Imaging

Award

Academic Service

Senior Program Committee