# 🚀 ReID-XFD: Video-based Human Recognition at Extreme Far Distances  
### *WACV 2026 Workshop Challenge*  
📍 Tucson, Arizona — March 6–7, 2026  

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## 🌍 Overview

**VReID-XFD 2025** introduces the **first large-scale benchmark** for *video-based human recognition at extreme far distances (XFD)*.  
This challenge aims to evaluate models that can **recognize individuals across UAV (aerial) and ground cameras** under real-world conditions — including extreme variations in **scale, viewpoint, clothing, and illumination**.

🔗 **Official Workshop Website:** [https://www.it.ubi.pt/VReID-XFD/#intro](https://www.it.ubi.pt/VReID-XFD/#intro)

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## 🎯 Challenge Tracks

| Track | Description |
|:------|:-------------|
| **A→G** | Match aerial to ground-view videos |
| **G→A** | Retrieve aerial identities from ground inputs |
| **A→A** | Match subjects across aerial videos |

Each track evaluates **cross-view** and **cross-session** generalization performance.





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## 🗂️ Dataset Highlights

- **553 unique identities** recorded over **two sessions per subject**  
- **13M+ annotated bounding boxes** in video format  
- **16 soft-biometric attributes** (clothing color, hairstyle, accessories, etc.)  
- Data collected from **7 universities across 4 countries**  
- **Predefined train/test splits** for all evaluation tracks  

💻 **Baseline Code:** [VReID-XFD GitHub Repository](https://github.com/VReID-XFD/VReID-XFD.git)

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## 🧮 Evaluation Protocol

- **Primary Metric:** Mean Average Precision (mAP)  
- **Secondary Metrics:** Rank-1, Rank-5, Rank-10  
- **Final Leaderboard:** Average mAP across all tracks (**A→G**, **G→A**, **A→A**)

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## 🏆 Competition Timeline

| Phase | Date (AOE) | Details |
|:------|:------------|:--------|
| **🚀 Competition Launch** | **October 16, 2025** | Kaggle competition page opens. Teams can register and download the training data to begin development. |
| **📊 Validation & Leaderboard Phase** | **October 16 – December 20, 2025** | Submit predictions, monitor progress on the public leaderboard, and refine models based on feedback. |
| **⏰ Submission Deadline** | **December 20, 2025** | Final submission deadline for all competition entries. |
| **📢 Competition Decision Notification** | **December 21, 2025** | Official competition results and decisions will be announced. |
| **📝 Paper Submission Deadline** | **December 27, 2025** | Submission of technical papers describing team approaches and results. *(Strict AOE deadline)* |
| **📬 Paper Acceptance Notification** | **January 6, 2026** | Notification of accepted papers across all competition tracks. |
| **🖋️ Camera-Ready Paper Deadline** | **January 8, 2026** | Final camera-ready versions of accepted papers due. *(Strict AOE deadline)* |
| **🏅 Workshop & Awards Ceremony** | **March 6–7, 2026** | Winners announced and top teams invited to present at the **VReID-XFD Workshop, WACV 2026 (Tucson, Arizona)**. |

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## 🏆 Publication Opportunity

Top-performing teams will be **invited to publish their methods** as part of the **WACV 2026 Workshop Proceedings**.  
Join the challenge to **gain recognition**, **advance research**, and **contribute to the community** on **video-based person re-identification**.

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## 🤝 Workshop Invitation

We invite proposals and participation for workshops held in conjunction with **WACV 2026**,  
to be conducted **in person in Tucson, Arizona, on March 6–7, 2026**.

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## 📬 Contact

For queries or participation details, please visit the  
👉 [Official Workshop Page](https://www.it.ubi.pt/VReID-XFD/#intro)

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**Organized as part of the “Video-based Human Recognition at Extreme Far Distances” Workshop, WACV 2026.**