QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(textBoxQRCode.Text, QRCodeGenerator.ECCLevel.Q);
pictureBoxQRCode.BackgroundImage = qrCode.GetGraphic(20);<div id="qrcode"></div>
<script type="text/javascript">
new QRCode(document.getElementById("qrcode"), "http://jindo.dev.naver.com/collie");
</script>
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)