Here is my code, but I've no idea where to put it and how to code it.

include "opencv/highgui.h"

include "opencv/cv.h"

include <opencv/cxcore.h>

include <iostream>

include <stdio.h>

include <stdlib.h>

using namespace cv; using namespace std;

int main(int, char**) { Mat src; Mat src_gray; int thresh = 100; int max_thresh = 255; RNG rng (12345);

cv::Mat frame;
VideoCapture capture;
capture.open(0);

while (true)
{
    capture.read(frame);
    Mat threshold_output;
    vector<vector<Point>> contours;
    vector<Vec4i> hierarchy;

    cvtColor(frame, src_gray, CV_BGR2GRAY); //produce out2, a one-channel image (CV_BUC1)
    blur(src_gray, src_gray, Size(5,5));

    threshold(src_gray, threshold_output, thresh, max_thresh, CV_THRESH_BINARY_INV);

    findContours(threshold_output, contour

Hi norzanbzura, could you please update your question with the code that you just posted? The comment section has a limited number of characters, so we can not see it all. Thanks

Hi Martin, I have posted updated question with my full code. Kindly please take a look. Thanks for your consideration.