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I know it is a silly question but it is very important to get the answer.In this blog post, you will learn how to perform remote development on a Raspberry Pi (or Amazon EC2 server). I originally wrote this blog post when the alpha version was released, and it has now been updated on November 30th, 2018 to support the official release.I am using opencv 3.1.0 but the repo on github to which I want to contribute to uses вЂimport cvвЂ™ statement to use it so which OpenCV version should I install to use it. OpenCV 4 was released on November 20th, 2018. An optional step you may wish to perform is installing the VirtualBox Guest Additions on your machine.This tutorial provides step-by-step instructions to install OpenCV 4 (with Python bindings) on your macOS machine.

An Amazon AWS server for remote deep learning Your Raspberry Pi for remote computer vision development Adrian Rosebrock Fashion MNIST with Keras and Deep Learning Keras: Multiple Inputs and Mixed Data macOS Mojave: Install TensorFlow and Keras for Deep.TodayвЂ™s tutorial is actually a chapter for my upcoming book, Raspberry Pi for Computer Vision.As I was writing the chapter I realized that the guide wasnвЂ™t specific to the RPi and could actually be used for anyone who needed to configure a remote system for development (and in particular, using the Python programming language).Therefore, I decided to take the chapter and convert it into a blog post.Using this tutorial you will learn how to configure: You should visit that page and find + follow the appropriate guide for. I maintain an OpenCV Install Tutorials page which contains links to previous OpenCV installation guides for Ubuntu, macOS, and Raspberry Pi. The first step today is to install OpenCV on your system (if you havenвЂ™t already).

The remote machine where your code is executing. Your host machine (also called your local machine) that has your monitor, keyboard, and mouse attached to. What is remote development? Figure 1: Remote Python development flowchart.Remote development assumes that you have two computers:

Why would I want to write my code remotely?If youвЂ™re working with a cloud-based instance such as Amazon EC2, Microsoft Azure, etc., then you do not have physical access to the machine (meaning there is no keyboard/mouse to use).In that situation you need to login to the server and perform remote development вЂ” and youвЂ™ll want to ensure that your local host is configured properly for remote development.If youвЂ™re using a Raspberry Pi then you certainly could connect a keyboard, monitor, and mouse, but thatвЂ™s not always necessary!First, youвЂ™ll have the hassle of setting up the additional hardware вЂ” itвЂ™s clunky to set up, youвЂ™ll lose space on your desk, and worst of all, youвЂ™ll constantly be switching back and forth between your RPi keyboard and your laptop/desktop keyboard.Secondly, even with the release of the Raspberry Pi 4, the RPi itself is still very underpowered compared to your laptop/desktop вЂ” you wonвЂ™t (and shouldnвЂ™t) be able to utilize powerful programming IDEs on the Pi itself.When it comes to Python development, PyCharm is quite literally the standard.However, IDEs like PyCharm, while super powerful, are resource hogs, consuming quite a bit of RAM and CPU cycles вЂ” on a resource-constrained device such as the RPi, running such an IDE is computationally wasteful. WeвЂ™ll be covering these methods later in this guide.Once youвЂ™re connected to the remote machine you can then:Figure 1 illustrates the concept of using your host machine to login to a device, writing code on the remote system, and then executing it.While you are still typing using the keyboard on your local system, the commands/code itself are actually being executed on the remote machine. Your remote machine is the machine you login to via your host machine.To perform development you first connect to the remote machine from your host.There are a number of ways to connect to the remote machine, including SSH, VNC, Jupyter Notebooks, and others.

An SSH client installed on your local machine. An SSH server installed and running on your remote machine. Secure Shell (SSH) Figure 2: Secure Shell (SSH) is essential to remote development with Unix systems such as Ubuntu, macOS, EC2, and Raspbian.The first method, and arguably the most simple, is to utilize Secure Shell (SSH), which is the ssh command on Unix machines. Connecting to a remote machine or Raspberry PiThere are a number of methods, protocols, and procedures to connect to a remote machine.The methods discussed in this section are certainly not exhaustive, but they are my favorites and ones you will absolutely encounter when performing remote development. And then have those files transferred (potentially automatically) to the Pi so you can run the code itself on the remote machine.In the remainder of this tutorial, IвЂ™ll show you how to configure your host machine to create a seamless transition, making it feel like youвЂ™re writing code on your host but youвЂ™re actually writing code on the remote system.

Once logged in, I can now execute any command I wish (provided I have the proper permissions, of course) on the remote machine. The username of the user youвЂ™ll be logging into on the remote machine.Once you have that information, you can use the following command as a template: $ ssh you are using Amazon EC2, you may need to supply a private key instead of a password: $ ssh -i ~/keyfile.pem # AWS EC2For example, if the IP address of my remote machine is 10.0.0.90 and my username is adrian , the ssh command becomes: $ ssh can then supply my password and login to the remote machine. The IP address of the machine you are connecting to. The last I checked PuTTY was still a good option but IвЂ™ll leave SSH install on Windows up to you.Provided you have SSH installed, first open a terminal/command line on your host machine. If you are using Windows you may need to install itNote: I havenвЂ™t used Windows in over 10+ years and do not officially support Windows on the PyImageSearch blog. On Ubuntu, if you need to install an SSH server, simply: $ sudo apt-get install openssh-serverOn macOS, you only need to enable вЂњRemote LoginвЂќ: sudo systemsetup -setremotelogin onSee below for two options to enable an SSH server on the Raspberry Pi.If youвЂ™re working with a Unix-based machine (such as Linux or macOS), the ssh client is installed by default.

Once you turn on SSH you can begin remote development with your Raspberry Pi.Then youвЂ™ll be presented with the interfaces, one of which is SSH: Figure 9: SSH for Raspberry Pi can be turned on from the вЂњP2 SSHвЂќ menu item.A reboot will be required. SSH is essential for remote development on the Raspberry Pi.Option 2: The second method is to use the following command to enable it: $ sudo service ssh startThe problem with this method is that requires you to have physical access to the RPi to type in the command.The second issue is that if you reboot the Raspberry Pi, SSH will not automatically start (i.e., starting SSH will not persist across reboots).Option 3: Similar to Option 1, you may enter the Raspberry Pi Configuration via the command line: Figure 7: The raspi-config command allows you to change system settings.From there, youвЂ™ll be presented with a terminal menu: Figure 8: Select вЂњ5 Interfacing OptionsвЂќ to find SSH and other interface settings for the Raspberry Pi. A quick note on SSH on the Raspberry PiItвЂ™s important to note that SSH is turned off by default on the Raspberry Pi, meaning that you cannot connect to your RPi via SSH without first enabling it.There are a few methods to enable SSH on the Raspberry Pi.Option 1: You may enable it via the Desktop user interface: Figure 5: The Raspberry Pi Configuration desktop GUI is accessed from the main menu.From there, find the вЂњInterfacesвЂќ tab and enable SSH: Figure 6: Enabling SSH on the Raspberry Pi via the Desktop. Do not attempt to use X11 forwarding for apps where the content changes often or there are video feeds.

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