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OpenCV

A widely used free code library that lets software see and understand images and video.

What it does

OpenCV, short for Open Source Computer Vision Library, is a toolkit programmers use to give software the ability to work with pictures and video. "Computer vision" means getting computers to make sense of what's in an image.

The project offers documentation, courses and a community forum through its website. Many other apps and AI projects use it behind the scenes.

Who it's for

Programmers, researchers and students working with images, cameras or video.

Can I use it without coding?

Developers only. It's a programming library, so you need to write code to use it. New to this? Start here.

Can I run it?

Cost
FreeNothing to pay or sign up for.
API key
Not needed

Try it

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (Apache-2.0): Permissive: free to use, change and share, including for business.
  • More on staying safe

Where people are talking about it