Summary

This repository provides a tutorial and template for integrating OpenCV 4.x.y with Android Studio projects using the Native Development Kit (NDK). It targets Android developers seeking to leverage C++ for high-performance image processing tasks, enabling efficient execution of complex algorithms directly within mobile applications via JNI.

How It Works

The project facilitates a native C++ OpenCV pipeline within an Android application. Developers implement image processing logic, such as adaptive thresholding on camera frames, in C++. This native code is then exposed to the Android UI layer (Kotlin/Java) through the Java Native Interface (JNI), allowing for optimized performance critical for real-time computer vision tasks.

Quick Start & Requirements

To use the template, clone the repository into Android Studio. Download the OpenCV 4.12.0 Android SDK (or a compatible version) and unzip it. Edit the gradle.properties file to point to your OpenCV SDK path. Sync Gradle and run the application on an Android device. Key dependencies include OpenCV 4.12.0, Android Studio (2024.2.1+), Android NDK 27.0, and Gradle 8.13, targeting SDK 34. The project also details steps for bootstrapping entirely new Android projects with native OpenCV support.

Highlighted Details

• Demonstrates a live camera feed with an adaptive threshold filter applied using native C++ OpenCV.
• Provides a clear pathway for integrating C++ OpenCV logic into Android Kotlin or Java applications.
• Includes comprehensive instructions for setting up a new Android project from scratch with NDK and OpenCV integration.

Maintenance & Community

The primary channel for questions and remarks is opening an issue on the GitHub repository. No specific community links (e.g., Discord, Slack) or details on contributors/sponsorships are provided in the README.

Licensing & Compatibility

The license type for this repository is not specified in the README. Compatibility is focused on Android development environments using Android Studio and NDK.

Limitations & Caveats

Setup instructions and file paths provided are specific to a Mac OS environment and may require adaptation for other operating systems. The README mentions specific versions (e.g., OpenCV 4.12.0, NDK 27.0) which might imply potential compatibility issues with significantly older or newer toolchains without modification. The absence of a stated license is a significant adoption blocker.