Resources
Learn calibration,the visual way.
Tutorials, printable boards, sample datasets, and reference material — everything you need to go from raw captures to production-ready intrinsics.
Pattern boards
Printable calibration targets.
Standard pattern PDFs sized for A4 and US-Letter. Print at 100% scale, then measure with a ruler to confirm the square size before capture.
- Download
PDF
Chessboard · 9 × 6
18 mm square - Download
PDF
ChArUco · 7 × 5
25 mm square / 18 mm marker - Download
PDF
ArUco grid · 4 × 4
32 mm marker · DICT_4X4_50 - Download
PDF
Circles grid · 11 × 4 (asymmetric)
15 mm spacing - Download
PDF
Chessboard · 7 × 9
22 mm square - Download
PDF
ChArUco · 5 × 5
35 mm square / 26 mm marker - Download
PDF
ArUco grid · 5 × 7
26 mm marker · DICT_5X5_100 - Download
PDF
Circles grid · 7 × 7 (symmetric)
20 mm spacing
Quick access
Everything you need at hand.
Documentation
Docs & guides.
Step-by-step guides for the web app, the calibration workflow, and the export formats — everything to go from capture to production.
Open the docsPython SDK
Use results in your code.
Install the official package and pull intrinsics, undistort, and rectify inside your own OpenCV or ROS pipeline — pip install calibrx.
View on GitHubSample data
Example capture sets.
Ready-to-use ChArUco and chessboard image sets. Drop them into a CalibrX project to try the full workflow without a camera.