Corner2Tag

Checkerboard-Based Event Camera Calibration

Taehun Ryu · Changwoo Kang · Kyungdon Joo

CVPR 2026 Highlight

Official repository for Corner2Tag, presented at CVPR 2026 and currently being extended for a journal version.

News

• 26.04.09. :tada: Our CVPR paper was selected as Highlight! (14.1% of accepted papers, 3.6% of total submissions.)
• 26.02.23. :tada: Corner2Tag was accepted to CVPR 2026! (acceptance rate: 25.42%)

Publications

Journal Extension

An extended journal version of Corner2Tag is currently in preparation.
We apologize for the temporary unavailability of the code after its initial release.
The code has been taken offline while we prepare a unified implementation for the journal extension.
Updates will be posted here when available.

CVPR 2026 — Highlight

From Corners to Fiducial Tags: Revisiting Checkerboard Calibration for Event Cameras
Taehun Ryu, Changwoo Kang, and Kyungdon Joo
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2026

Paper · Supplement · Project Page · Video

How to use

This repository maintains a single unified implementation of Corner2Tag.

For detailed setup and usage instructions, please refer to the full documentation.

Acknowledgments

This work is built on several great research works. We thank the authors for making their implementations publicly available.

• Event Cameras, Contrast Maximization and Reward Functions: An Analysis [CVPR 2019]
• Target-free Extrinsic Calibration of Event-LiDAR Dyad using Edge Correspondences [RA-L 2023]

Citation

If you find Corner2Tag useful in your research, please cite our CVPR 2026 paper:

@InProceedings{ryu2026corner2tag,
    author    = {Taehun Ryu and Changwoo Kang and Kyungdon Joo},
    title     = {From Corners to Fiducial Tags: Revisiting Checkerboard Calibration for Event Cameras},
    booktitle = {IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)},
    year      = {2026},
}