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CCTag
C++

CCTag

Detection of CCTag markers made up of concentric circles.

by alicevision · GitHub
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computer-visionconcentric-circlesdetectionMPL-2.0C++
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Detect CCTag markers made of circles in images using your computer or graphics card.

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2026-07-202026-08-31
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📄 About

Detection of CCTag markers made up of concentric circles.

CCTag has 410 stars on GitHub. It has been forked 100 times. CCTag is written mainly in C++. It has been in active development since 2015. CCTag is available under the MPL-2.0 license. Its main topics are computer-vision, concentric-circles, detection, fiducial-markers.

Frequently asked questions

What is CCTag?

Detection of CCTag markers made up of concentric circles.

Is CCTag open source?

CCTag is an open-source project. It is released under the MPL-2.0 license.

Is CCTag free?

Yes. CCTag is free and open source — you can use, modify and self-host it. Its MPL-2.0 license is copyleft: if you distribute a modified version, it must remain under the same license.

What license does CCTag use?

CCTag is available under the MPL-2.0 license.

What language is CCTag written in?

CCTag is written mainly in C++.

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