PYTHON

qr code scanner

    import cv2
    decoder = cv2.QRCodeDetector()
    data, points, _ = decoder.detectAndDecode(img) # size 250 * 250 np.array
    qr_code = data
    print('Decoded data: ' + data)
    if points is not None:
        print('Decoded data: ' + data)
    
        points = points[0]
        for i in range(len(points)):
            pt1 = [int(val) for val in points[i]]
            pt2 = [int(val) for val in points[(i + 1) % 4]]
            cv2.line(img, pt1, pt2, color=(255, 0, 0), thickness=3)
    
        cv2.imshow('Detected QR code', img)