// main.js function setup() { createCanvas(500, 500); background(0); } function draw() { background(0); point(0, 0); point(0, 500); point(500, 0); point(500, 500); point(250, 250); point(250, 50); point(250, 450); point(50, 250); point(450, 250); point(50, 50); point(50, 450); point(450, 50); point(450, 450); }

#include "opencv2/opencv.hpp"

using namespace cv;

int main(int, char**)
{
    VideoCapture cap(0); // open the default camera
    if(!cap.isOpened())  // check if we succeeded
        return -1;

    Mat edges;
    namedWindow("edges",1);
    for(;;)
    {
        Mat frame;
        cap >> frame; // get a new frame from camera
        cvtColor(frame, edges, CV_BGR2GRAY);
        GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);
        Canny(edges, edges, 0, 30, 3);
        imshow("edges", edges);
        if(waitKey(30) >= 0) break;
    }
    // the camera will be deinitialized automatically in VideoCapture destructor
    return 0;
}