resize ( frame, width = 400 ) # find the barcodes in the frame and decode each of the barcodes barcodes = pyzbar. sleep ( 2.0 ) # open the output CSV file for writing and initialize the set of # barcodes found thus far csv = open ( args, "w" ) found = set () # loop over the frames from the video stream while True : # grab the frame from the threaded video stream and resize it to # have a maximum width of 400 pixels frame = vs. start () #vs = VideoStream(usePiCamera=True).start() time. parse_args ()) # initialize the video stream and allow the camera sensor to warm up print ( " starting video stream." ) vs = VideoStream ( src = 0 ). add_argument ( "-o", "-output", type = str, default = "barcodes.csv", help = "path to output CSV file containing barcodes" ) args = vars ( ap. # import the necessary packages from import VideoStream from pyzbar import pyzbar import argparse import datetime import imutils import time import cv2 # construct the argument parser and parse the arguments ap = argparse. Now match for OpenCV + ZBar + Python barcode scanner project! Press q to quit
$ pip install pyzbar install numpy $pip install numpy If you are not using a Pythonvirtual environment you can just do:
Now that I have a Python 3 virtual environment named barcode on my machine, I activated the barcode environment (yours might have a different name) and installed pyzbar:Īn OpenCV barcode and QR code scanner with ZBar Installing ZBar for macOSusing brew is equally as easy (assuming you have homebrew installed): Installing ZBar for Ubuntu can be accomplished with the following command: Step 4: Installing ZBar (with Python Bindings) for Barcode Decoding To quit, hit the key q "on" the video window(s) to stop thecamera. You should see two images from your webcam-one in gray scale, one in color just like the one above, albeit with your face!. # When everything done, release the capture Gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) Step 3: OpenCV and Python Webcam Quick TestĬreate a Python file, say camera-test.py containing: import numpy as np Test OpenCV Installation $ python3 # or python2 (newcvtestpy2) $ cd lib/python3.6/site-packages (newcvtest) $ ln -S /usr/local/Cellar/opencv/3.3.1_1/lib/python3.6/site-packages/ cv2.so (newcvtest) $ cd lib/python3.6/site-packages OpenCV Python2.7 Path : /usr/local/Cellar/opencv/3.3.1_1/lib/python2.7/site-packages/cv2.soĪll you haveto do is add the cv2.so to your virtualenv's site-packages. Get the Python 2.7 cv2.so file path: $ cd /usr/local/Cellar/opencv/3.3.1_1Ĭv2.so # this name might be different but. OpenCV Python3.6 Path : /usr/local/Cellar/opencv/3.3.1_1/lib/python3.6/site-packages/ usr/local/Cellar/opencv/3.3.1_1/lib/python3.6/site-packagesĬv2.cpython-36m-darwin.so # this name might be different but. Get the Python 3.6 cv2.so file path: $ cd /usr/local/Cellar/opencv/3.3.1_1 You can installwhatever version you want. In the meantime, let's get the cv2.so for each version of Python. I'll just need to add the correct cv2.so to your Python's site packages. If I want both versionsto have OpenCV, I can.
I have Python 3.6 and Python 2.7 installed on my system. Now we needto link it to our version of Python. Okay, so wehave the OpenCV version we're going to use and where it's located. We're very close to getting the cv2.so we need. Thisis the OpenCV Version we want to use.
You'll want the highest version number listed here, in my case it's 3.3.1_1 $ cd 3.3.1_1Īwesome. In my case, the numbers 3.3.0_3 and 3.3.1_1 are different versions of OpenCV. Since weinstalled OpenCV with Homebrew, the package was should be listed in homebrew'sCellar ( /usr/local/Cellar/ ) To see what's in the Brew Cellar, do this: $ brew list
Install OpenCV with homebrew including Python 3 $ brew install opencv3 -with-contrib -with-python3 Tap homebrew-bio $ brew tap brewsci/bioģ.
Install and update homebrew $ /usr/bin/ruby -e "$(curl -fsSL )"Ģ. Step 2: Install OpenCV 3 for Python on Macġ. To install virtualenv via pip run: $ pip3 install virtualenvĬreation of virtualenv: $ virtualenv -p python3 Īctivate the virtualenv: $ source /bin/activate
Step 1: Setting Up and Using Python 3 Virtualenv on Mac $ brew install python3