JavaCV & Android

JavaCV-0.5基于OpenCV-2.4.5，在Android上运行按照教程设置即可，有几个注意事项：

教程：https://code.google.com/p/javacv/

Eclipse (Android 2.2 or newer):

1.Follow the instructions on this page: http://developer.android.com/training/basics/firstapp/
2.Go to File > New > Folder, select your project as parent folder, type "libs/armeabi" as Folder name, and click Finish.
3.Copy javacpp.jar and javacv.jar into the newly created "libs" folder.
4.Extract all the *.so files from javacv-android-arm.jar, opencv-2.4.5-android-arm.jar, and ffmpeg-1.2-android-arm.jar directly into the newly created "libs/armeabi" folder, without creating any of the subdirectories found in the JAR files.
5.Navigate to Project > Properties > Java Build Path > Libraries and click "Add JARs...".
6.Select both javacpp.jar and javacv.jar from the newly created "libs" folder.

注意事项：
1.上面第三步和第四步是分别复制到libs和libs/armeabi目录
2.该库运行需要CPU支持FPU（要在不支持FPU的机器上运行，需要自己修改参数重新编译库，运行效果可能很差）
查看CPU是否支持FPU方法：http://stackoverflow.com/questions/8161184/detecting-fpu-presence-on-android

# cat /proc/cpuinfo 
Processor       : ARMv7 Processor rev 3 (v7l)
BogoMIPS        : 249.96
Features        : swp half thumb fastmult vfp edsp neon vfpv3 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x1
CPU part        : 0xc08
CPU revision    : 3
[ ... ]
If the "Features" line lists at least vfp, then the ARM SoC has an FPU.

3.模拟器不支持摄像头
4.如果没有后置摄像头，需要修改示例代码
FacePreview.java中
mCamera = Camera.open(); 改为 mCamera = Camera.open(0);