Inspired by the performance of native OpenCV code for android, this sample is a straight forward port of OpenCV's face detector sample combined with Kyle McDonald's maintained C++ FaceTracker code that was originally proposed by Jason Saragih.
It is available free for non-commercial use, and may be redistributed under these conditions. Please see license.md for complete details. For commercial use, request a quote.
These instructions have been tested on Ubuntu 12.04 Linux. I suspect it will work on other architectures. Modify as necessary.
- Ensure that you have installed what is needed to do OpenCV development on Android. Instructions are here. You should only need address the sections under the heading Manual environment setup for Android development and Native development in C++.
- Note: I have had success with the Android SDK 2.0 when you are installing the SDK from android-manager.
- Clone this repository by running
git clone git://github.com/ndepalma/android-clm-tracker.git. - Import the OpenCV library into your eclipse workspace.
- You'll find basic instructions here.
- See the section under the head Import OpenCV library and samples to the Eclipse
- Import the project into eclipse by right clicking in the package explorer and selecting Import
- Accept the default settings and project name.
- Setup the compilation environment
- Modify the file
jni/Android.mk. Change the lineinclude /home/nd/and_cv/OpenCV-android-sdk/sdk/native/jni/OpenCV.mkto point to your OpenCV makefile in the Android OpenCV. - Modify the file
jni/Application.mk. Change the lineAPP_CPPFLAGS := -frtti -fexceptions -I/home/nd/projects/android-clm-tracker/jni/include/to point to the absolute path of your android-clm-trackerjni/includedirectory. - Right click on the project properties and set up the project to be dependent in the C++ build on the OpenCV Library you imported in Step 3. In the file
project.properties, it should contain a line that looks something like:android.library.reference.1=../OpenCV Library - 2.4.9after this step is completed successfully.
- Modify the file
- Build the
.sofile by changing to the directory of yourandroid-clm-trackerand runningndk-build -B. - Install OpenCV apk to your phone. From this website, find the apk in the OpenCV SDK and install it using:
<Android SDK path>/platform-tools/adb install <OpenCV4Android SDK path>/apk/OpenCV_2.4.9_Manager_2.18_armv7a-neon.apk - Clean and rebuild your eclipse project. There shouldn't be any errors at this point.
- Deploy to an attached phone.
Errata:
- Some people have had trouble building the APK. If this is the case, go to your project android build properties and uncheck "Is library". You'll know it because you'll think to yourself "This must refer to OpenCV being a library. Geez, this is a big misunderstanding!"
- If it keeps asking you to install OpenCV Manager and you have - make sure your tablet has the NEON extensions. Find your tablet online and look up the processor. Android apparently lets you install native libraries that aren't for your processor. So make sure that when you install OpenCV and you build your jni (in the android.mk), you are targetting the right processor for your tablet. I have assumed an ARM processor with the NEON (ARMs SIMD Co-processor) extensions.
Major credit for this project goes primarily to Jason Saragih for the original algorithm and code, Kyle McDonald for maintaining the C++ code and mediating the different FaceTracker spin-off projects, and to the OpenCV team who originally ported OpenCV to Android. This project is meant to be a proof of concept and, as such, can be extended to your project as needed.
android-clm-tracker was forked and modified from the original c++ source at Kyle McDonald's FaceTracker github.