Calling OpenCV2.4 APIs in AOSP

Here is a sample of calling OpenCV2.4 static library we have discussed in the other blog.
This sample is also compiled by NDS as an external package, which locates, for example, external/pprotector.

The directory tree is as follows and we called OpenCV2.4 APIs in privacy_detect.cpp. 

.

|-- Android.mk

|-- ImageUtils.h

|-- ImageUtils_0.7.cpp

|-- detectObject.cpp

|-- detectObject.h

|-- haarcascades

|   |-- faces.jpeg

|   |-- fist.xml

|   |-- haarcascade_eye.xml

|   |-- haarcascade_eye_tree_eyeglasses.xml

|   |-- haarcascade_frontalface_alt2.xml

|   |-- haarcascade_profileface.xml

|   |-- haarcascade_smile.xml

|   |-- lbpcascade_frontalface.xml

|   |-- palm.xml

|-- preprocessFace.cpp

|-- preprocessFace.h

|-- privacy_detect.cpp

|-- privacy_detect.h

|-- recognition.cpp

`-- recognition.h

As the compilation of OpenCV2.4 to AOSP, the big part is how to set up the NDK compiling configuration, which is Android.mk. Please note that the value of LOCAL_STATIC_LIBRARIES  includes the static library of OpenCV2.4 (i.e., libopencv24) and other built-in static libraries with OpenCV 2.4 SDK.


Here is the content of my Android.mk :

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE     := libpprotector24

LOCAL_SRC_FILES  := privacy_detect.cpp detectObject.cpp ImageUtils_0.7.cpp preprocessFace.cpp recognition.cpp

LOCAL_STATIC_LIBRARIES += libopencv24 opencv_contrib  opencv_legacy  opencv_stitching  opencv_superres  opencv_ocl opencv_objdetect  opencv_ml  opencv_ts  opencv_videostab  opencv_video  opencv_photo  opencv_calib3d  opencv_features2d  opencv_highgui  opencv_imgproc  opencv_flann opencv_androidcamera  opencv_core tbb libjpeg libpng libtiff libjasper IlmImf

LOCAL_CFLAGS := -Wall -Wextra -Wno-error=non-virtual-dtor -Werror=return-type -std=c++11 -frtti -fexceptions

LOCAL_LDLIBS := prebuilts/ndk/9/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a/libgnustl_static.a -lc  -llog  -lm  -ldl  -lz