# oreillymedia/Learning-OpenCV-3_examples

Repository: https://github.com/oreillymedia/Learning-OpenCV-3_examples
Canonical: https://ross.abutalabs.com/products/learning-opencv-3_examples
Language: C++
License Family: other
Last push: 2021-02-19T19:42:48+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3557, "days_push": 2021, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2267, forks 882 (observed 2026-08-28T04:06:32.844196+00:00)

## What it is
The official companion repository of example code and chapter exercises for the book 'Learning OpenCV 3' by Adrian Kaehler and Gary Bradski, written in C++. It includes a CMake build setup and a Dockerfile that provisions a complete Ubuntu environment with OpenCV 3.2 and opencv_contrib.

## Use cases
- learn OpenCV 3 by running the book's example programs
- build and run C++ computer vision demos like edge detection and video capture
- set up a self-contained OpenCV 3.2 development environment with Docker
- work through chapter exercises for Learning OpenCV 3
- study sample code for image loading, smoothing, pyramids, and log-polar transforms
- get a ready-made OpenCV build with opencv_contrib on Ubuntu

## When to choose
- you are reading Learning OpenCV 3 and want the accompanying example code and exercises
- you want runnable C++ snippets demonstrating core OpenCV 3 APIs
- you need a reproducible Docker environment preloaded with OpenCV 3.2 and opencv_contrib

## When to avoid
- you need a maintained computer vision library rather than book sample code
- you are working with OpenCV 4 or newer APIs, since the code targets OpenCV 3.x
- you want a production-ready application or reusable library

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: computer-vision, image-processing, video-processing
- domain: computer-vision, education, tutorials, image-processing
- platform: cpp, cross-platform
- tags: opencv, example-code, book-companion, cmake, c-plus-plus, docker-environment, exercises, linux, docker

## Member repositories
- oreillymedia/Learning-OpenCV-3_examples (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:32.844196+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:42:21.339801+00:00, confidence not recorded.
  - readme: https://github.com/oreillymedia/Learning-OpenCV-3_examples (fetched 2026-08-28T04:06:32.844196+00:00, sha 678c9aa1d1fe)
- Data as of 2026-08-30T08:39:29.467469+00:00.