convert Bitmap to Mat after capture image using android camera

Question

Mat b = new Mat();
Bitmap bmp = getIntent().getExtras().getParcelable(\"image_send\");

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCr         


        

Answer 1

With Camera2 this task is very fast, only you need config the ImageReader with ImageFormat on YUV_420_888 and then proccess frames with OpenCV like this:

// You can read image with differents patterns for example grayscale:
Mat mGray(height, width, cv::IMREAD_GRAYSCALE, pFrameData); 

A complete implementation in the next answer: https://stackoverflow.com/a/49331546/471690