Open the built-in Android camera using OpenCV

Question

I just need to know how I can start with this, in fact I need to open my own Android camera using opencv.

Where can I find relevant documents or any useful material? I set up my eclipse by working with opencv sample projects!

Answer 1

Look at the shipped opencv samples in opencv / samples / android /, there you can find some good examples. There is also a link to documents that show how to open the camera . Be sure to request permission to access the camera.

Short version, see the link for complete information: Add a layout:

<org.opencv.android.JavaCameraView android:layout_width="fill_parent" android:layout_height="fill_parent" android:visibility="gone" android:id="@+id/HelloOpenCvView" opencv:show_fps="true" opencv:camera_id="any" /> 

Initialization Procedure:

 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_3, this, mLoaderCallback); } 

Implement CVFrameListener2 interface:

  private CameraBridgeViewBase mOpenCvCameraView; @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.HelloOpenCvLayout); mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.HelloOpenCvView); mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE); mOpenCvCameraView.setCvCameraViewListener(this); } @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(); }