Astrgan's profile - activity

Hello How to Use the opencv_createsamples make a lot of pictures (250) copies for training cascades Haar?

Please show an example.

P.S. sorry for my bad English

Hello. How to convert ROI in gray (monochrome) on android?

I try that, but it does not work:

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {

      Mat image = inputFrame.rgba();
      Rect roi = new Rect(300, 50, 50, 10);
      Imgproc.cvtColor(image.submat(roi), image.submat(roi), Imgproc.COLOR_RGBA2GRAY);
      return image;
}

and

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {

   Mat image = inputFrame.rgba();
   Rect roi = new Rect(300, 50, 50, 10);
   Mat sub =image.submat(roi);
   Imgproc.cvtColor(sub, sub, Imgproc.COLOR_RGBA2GRAY);
   sub.copyTo(image.submat(roi));
   return image;

}

If you use the openCV library for programming on the desktop, how to display the image on the screen (window)?

P.S Sorry,my english is bad

How output image in window (java)?

On С was:

IplImage* image = cvLoadImage("C:\\image.png",1);
cvNamedWindow("image.png",CV_WINDOW_AUTOSIZE);
cvShowImage("image.png",image)