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I have an image and I'm trying to find the filled circles inside image (MCQ's). I have found all contours and when drawing its drawing the circles but now I don't know how to find the number of white pixels inside contour. Image is in binary pealse suggest something. Thanks

java.util.List<MatOfPoint> contours_crop = new ArrayList<MatOfPoint>();
Imgproc.findContours(crop.clone(), contours_crop, new Mat() ,Imgproc.RETR_EXTERNAL , Imgproc.CHAIN_APPROX_SIMPLE);

//Imgproc.cvtColor(crop, crop, Imgproc.COLOR_GRAY2BGR);
double noPixels = Core.countNonZero(contours_crop.get(3));
Toast.makeText(MainActivity.this, "Pixels:"+noPixels, 10000).show();

I have an image and I'm trying to find the filled circles inside image (MCQ's). (MCQ's).

I have found all contours and when drawing its drawing the circles but now I don't know how to find the number of white pixels inside contour. Image is in binary pealse suggest something. Thanks

java.util.List<MatOfPoint> contours_crop = new ArrayList<MatOfPoint>();
Imgproc.findContours(crop.clone(), contours_crop, new Mat() ,Imgproc.RETR_EXTERNAL , Imgproc.CHAIN_APPROX_SIMPLE);

//Imgproc.cvtColor(crop, crop, Imgproc.COLOR_GRAY2BGR);
double noPixels = Core.countNonZero(contours_crop.get(3));
Toast.makeText(MainActivity.this, "Pixels:"+noPixels, 10000).show();

I have an image and I'm trying to find the filled circles inside image (MCQ's).

I have found all contours and when drawing its drawing the circles but now I don't know how to find the number of white pixels inside contour. Image is in binary pealse suggest something. Thanks

java.util.List<MatOfPoint> contours_crop = new ArrayList<MatOfPoint>();
Imgproc.findContours(crop.clone(), contours_crop, new Mat() ,Imgproc.RETR_EXTERNAL , Imgproc.CHAIN_APPROX_SIMPLE);

//Imgproc.cvtColor(crop, crop, Imgproc.COLOR_GRAY2BGR);
double noPixels = Core.countNonZero(contours_crop.get(3));
Toast.makeText(MainActivity.this, "Pixels:"+noPixels, 10000).show();