OpenCV + Contrib for Android

The opencv_contrib modules the official AAR doesn't ship — prebuilt, one Gradle line, no NDK, no rebuild.

The official OpenCV package (org.opencv:opencv, maintained by the OpenCV team) is great but ships core only. To get contrib modules — face recognition, tracking, ArUco, text detection — you normally have to rebuild the whole SDK from source (CMake, NDK, hours lost). We prebuild them for you.

Install (Free)

dependencies {
    implementation("dev.ffmpegkit-maintained:opencv-contrib-android:5.0.0")
}

OpenCV 5.0 core + the most-requested contrib modules — arm64-v8a:

Included (Free)
Core	core, imgproc, video, calib, features, dnn, objdetect (incl. ArUco in 5.0), photo
Contrib	face (recognition), tracking (CSRT/KCF/MOSSE), text (scene text)

→ See examples/ for ready-to-use Kotlin (edge detection, DNN face detection, face recognition).

Free vs Pro vs Official

	Official AAR	Free (this)	Pro
Core modules	✅	✅	✅
face, tracking, text (contrib)	✗	✅	✅
Full contrib (ml, Haar/HOG, gapi, ximgproc, +25)	✗	✗	✅
Optimised DNN + pre-integrated models (face, OCR, doc-scan)	✗	✗	✅
ABI	arm64-v8a	arm64-v8a	arm64-v8a + x86_64
Channel	Maven Central	Maven Central + GitHub Release	jokobee.com
Price	Free	Free	$24 / $62 team

Pro adds, on top of everything in Free:

• Full contrib module set — ml, Haar/HOG (xobjdetect), G-API (gapi), ximgproc, and 25+ other opencv_contrib modules not in Free.
• Optimised DNN builds with pre-integrated models for face recognition, OCR, and document scanning — ready to use, no separate model wrangling.
• x86_64 ABI, in addition to arm64-v8a, for emulator/desktop-class testing.

→ Get OpenCV Pro for the complete contrib set, optimised DNN builds, and pre-integrated models (document scanning, face, OCR). Free users who need the full contrib set can pick it up there.

Upgrading from OpenCV 4.x to 5.0?

ml, Haar/HOG (xobjdetect), and G-API moved out of core into contrib in 5.0 — so the official AAR no longer resolves them. Those are in Pro. See the Migration Guide.

What's here

• examples/ — copy-paste Kotlin (basic imgproc, DNN face detection, face recognition).
• docs/official-vs-contrib.md · migration · faq
• Wiki — Quick Start, comparison, migration, FAQ, Pro integration.

By Jokobee

Prebuilt Android native libraries so you keep shipping instead of fighting CMake. Also: FFmpegKit · yt-dlp · Whisper

Jokobee · contact@jokobee.com · Apache-2.0 (same as OpenCV upstream).

License

This project redistributes OpenCV under the Apache License 2.0. See LICENSE. The upstream source is not modified.

Third-Party Notices

Third-party components bundled or built into this project retain their original licenses. See THIRD-PARTY-NOTICES.txt, which is also copied into the AAR assets at build time (readable at runtime via context.assets.open("THIRD-PARTY-NOTICES.txt")).