A Color-to-grayscale Android app using Android NDK r12b under Android Studio 2.1.2 with OpenCV 3.1.0 Android SDK.
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README.md

OpenCV3JNI

A Color-to-grayscale Android app using Android NDK r12b under Android Studio 2.1.2 with OpenCV 3.1.0 Android SDK.

如果您懂中文,欢迎来阅读我的文章http://johnhany.net/2016/07/opencv-3-1-ndk-dev-on-android-studio-2/

Requirements

Android Studio 2.1.2

Gradle version 2.10 Gradle Android Plugin 2.1.2

JDK 1.8.0

Android development requires JDK environment.

Android 6.0(API 23)

Test passed on x86 target-arch.

OpenCV 3.1.0 Android SDK

I'm only using OpenCV JNI. OpenCV Java API is not required.

Android NDK r12b

Directly downloaded inside Android Studio.

License

OpenCV3JNI is released under the MIT license.