OpenCV

license

Apache-2.0(OSI

source

public(github.com/opencv/opencv)

core features withheld

no — maintained by a non-profit foundation

OpenCV is Apache-2.0 and the library builds from its public repository, with extra modules in the equally public opencv_contrib. The only algorithms missing from the PyPI wheels are patented ones such as SURF, left out because they cannot be redistributed, not held back for a paid tier.

• https://causes.benevity.org/causes/840-455202940 recorded 2026-09-26

  Charity listing: "The Open Source Vision Foundation, which maintains the OpenCV library, is a non-profit organization dedicated to advancing the beneficial uses of computer vision in society."

• https://cdn.jsdelivr.net/gh/opencv/opencv-python@4.x/README.md recorded 2026-09-26

  opencv-python README: "The repository contains only OpenCV-Python package build scripts, but not OpenCV itself." and "Non-free algorithms such as SURF are not included in these packages because they are patented / non-free".

• https://raw.githubusercontent.com/opencv/opencv-python/HEAD/LICENSE.txt recorded 2026-09-26

  opencv-python packaging repository LICENSE.txt: "MIT License", "Copyright (c) Olli-Pekka Heinisuo".

• https://raw.githubusercontent.com/opencv/opencv/HEAD/LICENSE recorded 2026-09-26

  LICENSE is the Apache License, Version 2.0; the separate COPYRIGHT file lists Intel, the OpenCV Foundation, OpenCV AI and other holders.

• https://ungh.cc/repos/opencv/opencv/files/HEAD recorded 2026-09-26

  Repository tree of 7,370 files with no ee, enterprise, commercial or pro directory.

Measured on monthly PyPI downloads of opencv-python; the contrib and headless wheels are separate packages and not counted.

• https://pypistats.org/api/packages/opencv-python/recent recorded 2026-09-26

  last_month 29,918,110 downloads of opencv-python

OpenCV supplies the building blocks of computer vision - filtering, geometry, features, video and a fast engine for running networks trained in other frameworks - rather than training a predictor itself. Its classical learners now sit in the separate contrib repository, so the main library fits no model of its own.

• https://cdn.jsdelivr.net/gh/opencv/opencv_contrib@5.x/modules/ml/include/opencv2/ml.hpp recorded 2026-09-27

  opencv_contrib 5.x ml.hpp declares the learners NormalBayesClassifier, KNearest, SVM, EM, DTrees, RTrees, Boost, ANN_MLP, LogisticRegression and SVMSGD.

• https://ungh.cc/repos/opencv/opencv/files/HEAD recorded 2026-09-26

  Tree at HEAD: modules calib, core, dnn, features, flann, geometry, highgui, imgcodecs, imgproc, objdetect, photo, stereo, stitching, video, videoio and others; modules/ml holds only four perf files, and modules/dnn has ONNX, TensorFlow and TFLite importers.