OpenCV(Cpp) QRcode scanner - minho0315/OpenCV GitHub Wiki

#include "opencv2/opencv.hpp"
#include <iostream>

using namespace cv;
using namespace std;

int main(void)
{
	QRCodeDetector detector;

	Mat frame, gray;
	frame = imread("qr1.jpg");

	if (frame.empty()) {
		cerr << "Frame load failed!" << endl;
		return -1;
	}

	cvtColor(frame, gray, COLOR_BGR2GRAY);

	vector<Point> points;

	if (detector.detect(gray, points)) {
		polylines(frame, points, true, Scalar(0, 255, 255), 2);

		String info = detector.decode(gray, points);
		if (!info.empty()) {
			polylines(frame, points, true, Scalar(0, 0, 255), 2);
			cout << "Decoded Data : " << info << endl;
		}
	}

	imshow("frame", frame);
	waitKey(0);

	return 0;
}