scan.py

# MIT License
# 
# Copyright (c) 2017 Akshit Bhalla
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import zbarlight

from PIL import Image
import cv2


def main():

    # Begin capturing video
    capture = cv2.VideoCapture(0)

    while True:
        # To quit this program press q
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

        # Breaks down the video into frames
        ret, frame = capture.read()

        # Displays the current frame
        cv2.imshow('Current', frame)

        # Converts image to grayscale.
        gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

        # Uses PIL to convert the grayscale image into an array that zbarlight can understand.
        pil_im = Image.fromarray(gray)

        # Scans the zbarlight image.
        codes = zbarlight.scan_codes('qrcode', pil_im)

        # Prints data from image.
        print('QR codes: %s' % codes)

if __name__ == "__main__":
    main()