pyzbar_opencv_comparison.py

import os

import cv2
from pyzbar.pyzbar import decode

from qreader import QReader

SAMPLE_IMG_1 = os.path.join(
    os.path.dirname(__file__), "documentation", "resources", "test_draw_64x64.jpeg"
)
SAMPLE_IMG_2 = os.path.join(
    os.path.dirname(__file__), "documentation", "resources", "64x64.png"
)

if __name__ == "__main__":
    # Initialize the three tested readers (QRReader, OpenCV and pyzbar)
    qreader_reader, cv2_reader, pyzbar_reader = QReader(), cv2.QRCodeDetector(), decode

    for img_path in (SAMPLE_IMG_1, SAMPLE_IMG_2):
        # Read the image
        img = cv2.imread(img_path)

        # Try to decode the QR code with the three readers
        qreader_out = qreader_reader.detect_and_decode(image=img)
        cv2_out = cv2_reader.detectAndDecode(img=img)[0]
        pyzbar_out = pyzbar_reader(image=img)
        # Read the content of the pyzbar output (double decoding trick is needed to solve possible encoding issues)
        pyzbar_out = tuple(
            out.data.data.decode("utf-8").encode("shift-jis").decode("utf-8")
            for out in pyzbar_out
        )

        # Print the results
        print(
            f"Image: {img_path} -> QReader: {qreader_out}. OpenCV: {cv2_out}. pyzbar: {pyzbar_out}."
        )