A 90,000-star vision library that forgot to pitch itself
OpenCV is an open-source C++ computer vision library whose own README acts as a portal rather than a product page.

What it does
OpenCV is an open-source computer vision library written in C++. That much is clear from the metadata; the README itself, however, offers no feature list, no architecture overview, and no code samples. It behaves like a terse reception desk, pointing visitors toward external documentation, training courses, a Q&A forum, and a separate opencv_contrib repository for extra functionality.
The interesting bit
The repository has racked up nearly 90,000 stars despite a front page that refuses to pitch itself. The README treats GitHub as a lobby, not a showroom, funneling readers to opencv.org, the docs site, and even the core team’s commercial arm, OpenCV.ai. The implicit message is that if you have to ask what it does, you are probably in the wrong building.
Key highlights
- C++ foundation with topic tags covering deep learning and image processing
- 89,520 GitHub stars at time of writing
- Extended modules live in the companion
opencv_contribrepo - Ecosystem includes official courses, a streaming show, and a dedicated Q&A forum
- The core team offers paid development services through OpenCV.ai
Caveats
- The README is essentially a link farm; you will not learn what the library actually does without leaving the repository
- No build requirements, platform support, or even a terse feature summary appears in the source provided
Verdict
A fixture for developers already immersed in computer vision and C++; a frustrating dead end for anyone hoping to discover capabilities from the GitHub page alone.
Frequently asked
- What is opencv/opencv?
- OpenCV is an open-source C++ computer vision library whose own README acts as a portal rather than a product page.
- Is opencv open source?
- Yes — opencv/opencv is open source, released under the Apache-2.0 license.
- What language is opencv written in?
- opencv/opencv is primarily written in C++.
- How popular is opencv?
- opencv/opencv has 90.3k stars on GitHub and is currently cooling off.
- Where can I find opencv?
- opencv/opencv is on GitHub at https://github.com/opencv/opencv.