Work with images and video
Process images, detect features, recognize objects, and analyze motion. OpenCV provides reusable building blocks for research, prototypes, and applications.
Browse the documentationThe nonprofit behind OpenCV
OpenCV.
Open to everyone.
The world’s most popular computer vision library. Open Source Vision Foundation supports its development and maintenance, keeping essential tools freely available to everyone.
2 million+downloads every dayFoundation estimate
2,500+computer vision &
machine learning algorithms
machine learning algorithms
A foundation of the world’s
computer vision infrastructure.
01 / The OpenCV library
A practical toolkit.
A shared foundation.
OpenCV brings together more than 2,500 computer vision and machine learning algorithms. Its public source code lets people inspect how it works, adapt it to their needs, and contribute improvements.
Build across platforms
Use C++, Python, or Java on Linux, Windows, macOS, Android, and iOS. OpenCV’s source and release packages are publicly available.
Download OpenCVContribute to the library
Improve the code, test a change, report a reproducible bug, or make the documentation clearer. Every contribution helps the people building with OpenCV.
Find a way to contributeFrom everyday apps
to medical imaging.
OpenCV is acknowledged in YouTube for iOS and the Google app for iOS, in Adobe Substance 3D Sampler 2025, and in Philips Lumify 4.0 for Android.
These documented examples span consumer apps, creative tools, and medical imaging—part of the broad ecosystem that benefits from an open computer vision library.
02 / The foundation
The nonprofit
behind the library.
Open Source Vision Foundation is the U.S. 501(c)(3) nonprofit that operates OpenCV.
Our mission is to advance computer vision through open software. OpenCV is used by students, researchers, and developers around the world. Its reach depends on the ongoing work of maintainers and a global community of contributors.
Support for the project helps its core developers improve functionality, maintain the code, and review contributions. This ongoing work keeps useful computer vision tools accessible to the people who rely on them.
Open Source Vision Foundation · EIN 45-5202940
03 / Our supporters
Supported by a community.
OpenCV’s members and partners help sustain the project. We also thank the individual donors and contributors who support the library.
- Gold
- Arm · Qualcomm · Google Summer of Code
- Silver
- Roboflow · Orbbec · BMVA · Devpost
- Bronze
- JetBrains · Edge AI + Vision Alliance · OpenMV · Tangram Vision · Amped Software · Intuitivo · Rerun · Intrinsic · BairesDev · Big Vision
OpenCV members and partners · September 2026.
04 / Support OpenCV
The world relies on OpenCV.
OpenCV needs your help.
OpenCV is part of the world’s computer vision infrastructure, yet we maintain it on a tight nonprofit budget. Your support helps the people who keep the library working and moving forward.
Donations are processed securely by the provider you choose.
05 / Organizational sponsorship
Sponsor OpenCV.
If your organization relies on OpenCV, help sustain the library. Sponsorship supports ongoing maintenance, development, testing, and the review of community contributions.
| Sponsorship level | Annual support | Full benefits |
|---|---|---|
| Gold | $100,000 | Gold benefits guide (PDF) |
| Silver | $30,000 | Silver benefits guide (PDF) |
| Bronze | $6,000 | Bronze benefits guide (PDF) |
Support can include funding, development resources, and other agreed contributions. Recognition and benefits vary by tier and can include acknowledgment on OpenCV.org, newsletter mentions, and opportunities to participate in OpenCV Live. Benefits are subject to the terms in each guide.
Tell us about your organization and the support you have in mind. We’ll help you find the right level of participation.