Mat b = new Mat();
Bitmap bmp = getIntent().getExtras().getParcelable("image_send");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_image);
Mat tmp = new Mat (bmp.getWidth(), bmp.getHeight(), CvType.CV_8UC1);
Utils.bitmapToMat(bmp, tmp);
Imgproc.cvtColor(tmp, tmp, Imgproc.COLOR_RGB2GRAY);
//Imgproc.cvtColor(tmp, tmp, Imgproc.COLOR_GRAY2RGB, 4);
Utils.matToBitmap(tmp, bmp);
iv = (ImageView) findViewById(R.id.imageView1);
iv.setImageBitmap(bmp);
}
Can't display the bmp. My app has stopped after taking a picture.
Utils.bitmapToMat
converts an Android Bitmap to an OpenCV Mat. It requires a bitmap of type ARGB_8888
or RGB_565
.
import org.opencv.android.Utils;
Mat mat = new Mat();
Bitmap bmp32 = bmp.copy(Bitmap.Config.ARGB_8888, true);
Utils.bitmapToMat(bmp32, mat);