Am trying to use opencv in my android project. Here is a complete list of events i did over the past few weeks:
1- I used my mobile phone camera to take a picture stored it as bitmap
2- Ran face detection on it
3- Now i was supposed to use android opencv to highlight the edges in the face detection bitmap
I do not know much about ndk stuff. All I did was downloaded the android opencv sdk imported into my project workspace used this as library project for my application and am using the following code in my android application:
Bitmap canny_image = Bitmap.createBitmap(bmFace.getWidth(), bmFace.getHeight(), Config.ARGB_8888);
canny_image = bmFace.copy(Config.ARGB_8888, true);
Mat mImg = new Mat();
Utils.bitmapToMat(canny_image,mImg);
//Converting to grayscale
Mat mGray = new Mat(mImg.rows(), mImg.cols(), CvType.CV_8UC1, new Scalar(0));
Imgproc.cvtColor(mImg , mGray, Imgproc.COLOR_BGRA2GRAY, 4);
//Applying Canny
Imgproc.Canny(mGray, mGray, 80, 90);
//Converting back to 4 channel image
Imgproc.cvtColor(mGray , mImg, Imgproc.COLOR_GRAY2RGBA, 4);
canny_image.recycle();
System.gc();
canny_image = Bitmap.createBitmap(mImg.cols(), mImg.rows(), Bitmap.Config.ARGB_8888);
Utils.matToBitmap(mImg, canny_image);
However the logcat is showing unsatisfied link error. Now using the documentation from here.
In this link there is a point:
If your application project doesn’t have a JNI part, just copy the corresponding OpenCV native libs from <OpenCV-2.4.6-android-sdk>/sdk/native/libs/<target_arch> to your project directory to folder libs/<target_arch>.
In case of the application project with a JNI part, instead of manual libraries copying you need to modify your Android.mk file: add the following two code lines after the "include $(CLEAR_VARS)" and before "include path_to_OpenCV-2.4.6-android-sdk/sdk/native/jni/OpenCV.mk"
I did the same. In my application i made a folder libs and copied all the .so and .h files in the /sdk/native/libs/
but then again my library project does not contain the application.mk and android.mk files. Am totally messed up how to use opencv in my android application. I thought the linking problem was due to the fact that i have not loaded the library in my code but again when i use this code in my application it gives an exception:
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
mOpenCvCameraView.enableView();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
Referenced from the same link as i mentioned above. Please experts help me on this. I need some serious help. Been stuck here for like almost a week. How can i successfully use opencv in my android application. What am i missing?
