作ったサンプルコードは以下の通り
public class MainActivity extends Activity { static { if (!OpenCVLoader.initDebug()) { // Handle initialization error } else { } } private final static String TAG = "BGsubstractorTest"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (savedInstanceState == null) { getFragmentManager().beginTransaction() .add(R.id.container, new PlaceholderFragment()).commit(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } /** * A placeholder fragment containing a simple view. */ public static class PlaceholderFragment extends Fragment { ImageView mImageView; public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); return rootView; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); Mat input = new Mat(); BackgroundSubtractorMOG mog = new BackgroundSubtractorMOG(); Mat output = new Mat(); Bitmap bitmap1 = loadBitmap(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/IMG_20140818_000833235.jpg"); Utils.bitmapToMat(bitmap1, input); Imgproc.cvtColor(input, input, Imgproc.COLOR_RGBA2RGB); mog.apply(input, output); Bitmap bitmap2 = loadBitmap(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/IMG_20140818_000849955.jpg"); Utils.bitmapToMat(bitmap2, input); Imgproc.cvtColor(input, input, Imgproc.COLOR_RGBA2RGB); mog.apply(input, output); Bitmap bitmap3 = Bitmap.createBitmap(input.width(), input.height(), Bitmap.Config.ARGB_8888); Utils.matToBitmap(output, bitmap3); refreshImage(bitmap3); } private Bitmap loadBitmap(String imagefilePath) { BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = 4; options.inPreferredConfig = Config.ARGB_8888; Bitmap bm = BitmapFactory.decodeFile(imagefilePath, options); return bm; } private void refreshImage(Bitmap bmp) { mImageView = (ImageView)getActivity().findViewById(R.id.imageView1); mImageView.setImageBitmap(bmp); } } }
つまづいた所としてはBackgroundSubtractorMOGに読み込ませる画像がRGBA形式だとエラーになってしまう。
そのため一度RGB形式に直してやらないとうまく動かない。
Imgproc.cvtColor(input, input, Imgproc.COLOR_RGBA2RGB);
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