Bar and QR Code Reader using Python

 Bar and QR Code Reader using Python 

To create a bar and QR code reader using Python, we'll use the pyzbar library for decoding barcodes and QR codes and the opencv-python library for capturing and processing images.F

irst, you need to install the required libraries. Open your terminal or command prompt and run the following commands:

pip install pyzbar
pip install opencv-python

Once the libraries are installed, you can use the following code:

import cv2
from pyzbar import pyzbar
 
def read_barcodes(image):
    # Convert the image to grayscale
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
 
    # Use the pyzbar library to decode the barcodes
    barcodes = pyzbar.decode(gray)
 
    for barcode in barcodes:
        # Extract the barcode's bounding box coordinates and draw a rectangle around it
        (x, y, w, h) = barcode.rect
        cv2.rectangle(image, (x, y), (x + w, y + h), (0, 255, 0), 2)
 
        # Extract the barcode data and type from the barcode object
        barcode_data = barcode.data.decode("utf-8")
        barcode_type = barcode.type
 
        # Display the barcode data and type on the image
        text = "{} ({})".format(barcode_data, barcode_type)
        cv2.putText(image, text, (x, y - 10), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 255, 0), 2)
 
        # Print the barcode data and type
        print("Found {} barcode: {}".format(barcode_type, barcode_data))
 
    # Display the image
    cv2.imshow("Barcode Reader", image)
    cv2.waitKey(0)
 
# Open the camera for video capture
cap = cv2.VideoCapture(0)
 
while True:
    # Read a frame from the camera
    _, frame = cap.read()
 
    # Call the function to read barcodes in the frame
    read_barcodes(frame)
 
    # Break the loop if the 'q' key is pressed
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
 
# Release the camera
cap.release()
 
# Close all OpenCV windows
cv2.destroyAllWindows()
 

Save the code in a Python file (e.g., barcode_reader.py), and then run it. It will open your computer's camera and start reading barcodes and QR codes in real-time. When a barcode or QR code is detected, it will draw a rectangle around it and display the decoded information on the image.

To stop the program, press the 'q' key.

Please note that you'll need a webcam or a camera connected to your computer to run this code.