cannot load image into Mat opencv

Question

I want load image with Mat class on android opencv but i have some errors. I add library on my project. my code: private CameraBridgeViewBase mOpenCvCameraView;
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; } } };

@Override
public void onResume()
{
    super.onResume();
    OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_6, this, mLoaderCallback);
}



 @Override
 public void onCreate(Bundle savedInstanceState) {
     Log.i(TAG, "called onCreate");
     super.onCreate(savedInstanceState);
     getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
     setContentView(R.layout.activity_main);
     mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.HelloOpenCvView);
     mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
     mOpenCvCameraView.setCvCameraViewListener(this);
     if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_9, this, mLoaderCallback))
     {
       Log.e(TAG, "Cannot connect to OpenCV Manager");
     }
     else
         Log.i(TAG, "Load it"); 

     Mat Image = Highgui.imread("/mnt/sdcard/1.jpg");

 }

 @Override
 public void onPause()
 {
     super.onPause();
     if (mOpenCvCameraView != null)
         mOpenCvCameraView.disableView();
 }

 public void onDestroy() {
     super.onDestroy();
     if (mOpenCvCameraView != null)
         mOpenCvCameraView.disableView();
 }

 public void onCameraViewStarted(int width, int height) {
 }

 public void onCameraViewStopped() {
 }


public Mat onCameraFrame(CvCameraViewFrame inputFrame) {  
    return inputFrame.rgba();
}

Log:

enter image description here

Thanks

berak berak · Accepted Answer · 2014-09-03T08:20:31

you can't use any opencv code in onCreate()

the so's with opencv's native code are not loaded yet, you will have to wait, until mLoaderCallback finishes.

so, move any operation on Mat to onCameraViewStarted()

cannot load image into Mat opencv

1 Answers