QR code is a type of matrix barcode that is machine readable optical label which contains information about the item to which it is attached. In practice, QR codes often contain data for a locator, identifier, or tracker that points to a website or application, etc.
Problem Statement :
Generate and read QR codes in Python using qrcode and OpenCV libraries
Installing required dependencies:
pyqrcode module is a QR code generator. The module automates most of the building process for creating QR codes. This module attempts to follow the QR code standard as closely as possible. The terminology and the encoding used in
pyqrcode come directly from the standard.
pip install pyqrcode
Install an additional module pypng to save image in png format:
pip install pypng
import pyqrcode import png from pyqrcode import QRCode import cv2 import numpy as np
Create QR Code:
# OUTPUT SECTION # String which represents the QR code s = "http://www.raucci.net" # output file name filename = "qrcode.png" # Generate QR Code img = pyqrcode.create (s) # Create and save the svg file naming "brqr.svg" img.svg("brqr.svg", scale=8) # Create and save the svg file naming "brqr.png" img.png("brqr.png", scale=6)
Read QR Code
Here we will be using OpenCV for that, as it is popular and easy to integrate with the webcam or any video.
# INPUT SECTION # read the QRCODE image img = cv2.imread('brqr.png') # initialize the cv2 QRCode detector detector = cv2.QRCodeDetector() val, pts, st_code=detector.detectAndDecode(img) print(val)
Here the output