Shell: A user interface for accessing an operating system’s servicesI know that I have to change the. Shebang: A String at the beginning of a script to indicate execution. Command line: An interface for interacting with the operating system. There are many shells that can run UNIX commands, and the one used on the Mac Terminal is Bash.Depending on the shell you use: Bash. Bashprofile:It will be /Library/Python/3.6/bin in case of macOS and Python 3.6. This is because it can't find the path to the newer version, and this should be fixed by adding the following to.
Can .Bash_Profile Be Used For Python And Java Code And SetI’ll cover alternative methods (pip and Homebrew) in future installation guides (neither of these methods can be covered until OpenCV 4 is officially released).Finally, we’ll test out our OpenCV 4 install and get our feet wet with a real OpenCV project.To install Xcode, fire up the Apple App Store, find the Xcode app, and install. Compiling from source allows us to have full control over the compile and build as well as to install the full OpenCV 4 build. I post links to all my OpenCV install tutorials there.First, we’ll install Xcode and set up Homebrew.From there, we’ll establish Python virtual environments.Then we’ll compile OpenCV 4 from source. OpenCV 4 is packed with new features, many of which are deep-learning focused.Note: If you landed on the wrong install tutorial (perhaps you want to install OpenCV on Ubuntu or your Raspberry Pi), then you should visit my OpenCV installation guides page. Should i upgrade from office for mac 2011 to 2016When you’re ready, copy the entire command below to install Homebrew: $ /usr/bin/ruby -e "$(curl -fsSL )"Homebrew commands are shortened to brew. Step #2: Install HomebrewFor this step we’re going to install the Mac community package manager, Homebrew.Homebrew runs on Ruby which is a popular programming language. You can install the tools via: $ sudo xcode-select -installFigure 2: Installing Apple Command Line Tools on macOS.Click the “Install” button and wait about 5 minutes for the installation to complete. This is required , so that you’ll have make , gcc , clang , etc. Launch a terminal and enter the following command: $ sudo xcodebuild -licenseTo accept the license, simply scroll down and accept it.Once you’ve accepted the license agreement, let’s install Apple Command Line Tools. To install Xcode, launch the App Store, find Xcode, and run the installation.After Xcode has installed we need to accept a license agreement. If you’re using nano, you’ll see the shortcut keys at the bottom of the window which demonstrate how to save (write) and exit.Once you’re back in bash, source your bash profile: $ source ~/.bash_profileStep #3: Install OpenCV prerequisites using HomebrewIn this section we’ll ensure that Python 3.6 is installed. If you’re more comfortable with vim or emacs, then go for it.Edit your bash profile with nano using the following command: $ nano ~/.bash_profileOnce you’re actively editing the file, append the following lines to the end to update your PATH : # HomebrewFrom there, save the profile. For simplicity, I suggest the nano text editor. This script is run each time you launch a terminal. Install other prerequisitesOpenCV requires a few prerequisites to be installed before we compile it. If you see /usr/bin/python3 then you are using the system Python and you likely need to fix your bash profile and/or source it.Take the time now to verify you are using the Homebrew version of Python and not the system version. It sounds good, but Python 3.7 is unsupported by Keras/TensorFlow (both are used often on this blog) and thus are not a good choice for OpenCV either.These commands will install Python 3.6.5_1: $ brew install Be sure to copy the entire command + URL.Python 3.6.5 (default, Jun 17 2018, 12:13:06) on darwinType "help", "copyright", "credits" or "license" for more information.Great! I can see that we have Python 3.6.5 installed now.Let’s verify one more thing: $ which python3If you see /usr/local/bin/python3 you are using the Homebrew Python (which is what we desire). By default High Sierra and Mojave are coming with Python 3.7 now. Install Python 3.6It is extremely important to use Python 3.6. ![]() And my py2cv2 environment can be used to test legacy Python 2.7 + OpenCV 2.4 code. My py3cv3 virtual environment is used for Python 3 and OpenCV 3. I actually like to name my environments like so:Here my py3cv4 virtual environment can be used for Python 3 + OpenCV 4. You’ll want to read the docs for more information.Let’s take advantage of the first command to create a Python virtual environment for OpenCV: $ mkvirtualenv cv -p python3Running virtualenv with interpreter /usr/local/bin/python3Using base prefix '/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6'New python executable in /Users/admin/.virtualenvs/cv/bin/python3.6Also creating executable in /Users/admin/.virtualenvs/cv/bin/pythonVirtualenvwrapper.user_scripts creating /Users/admin/.virtualenvs/cv/bin/predeactivateVirtualenvwrapper.user_scripts creating /Users/admin/.virtualenvs/cv/bin/postdeactivateVirtualenvwrapper.user_scripts creating /Users/admin/.virtualenvs/cv/bin/preactivateVirtualenvwrapper.user_scripts creating /Users/admin/.virtualenvs/cv/bin/postactivateVirtualenvwrapper.user_scripts creating /Users/admin/.virtualenvs/cv/bin/get_env_detailsNotice that cv is the name of our environment and that I am creating a Python 3 (controlled by the -p python3 switch) environment.Important: Take note in the output that Python 3.6 is being utilized for the environment as well (highlighted).You may name your environment differently if you’d like. deactivate : Deactivates the current virtual environment This is necessary prior to installing packages and compiling OpenCV 4.Each time you wish to use the environment or install packages into it you should use the workon command.Now that our environment is activated, we can install NumPy: $ pip install numpyCompiling from source gives you the most control over your build as opposed to package managers such as pip, Homebrew, and Anaconda. Just in case, let’s workon (activate) the environment: $ workon cvFigure 4: We are “in” the cv virtual environment as is denoted by (cv) before the bash prompt.
0 Comments
Leave a Reply. |
AuthorChristine ArchivesCategories |