• Raspberry Pi Install Software

Earlier day’s computer obtained input information from keyboards and mouse, now they have evolved to be able to process information from images and videos. The ability of a computer (machine) to extract, analyze and understand information from an image is called as Computer Vision. In recent years the capability of Computer vision has become sophisticated enough, not only to recognize people/objects but also to also analyze their nature or read even their emotions. All these were made possible with the help of deep learning / AI where an algorithm trained with many similar images so that it can look for information in a new image. Today the technology has become reliable enough to be used in Security, hospitality and even in Financial Payment Portals. The most commonly used library for Computer vision is OpenCV. It is an open source free to use cross-platform library from Intel, meaning it could work on every operating system like windows, mac or Linux.

Raspberry Pi Install Software

We already explained and also done some. Today we will learn how to install the OpenCV4 library on Raspberry Pi 3 so that we can use it for Computer vision applications. This will allows OpenCV to run on a portable device like Pi opening doors to many possibilities. So let’s get startedInstalling OpenCV on Pi is a daunting process, mainly because it is very time consuming and the chances of stumbling across an error is high. So I have made this tutorial as simple and informative as possible based on the difficulties that I had and making sure you don’t face the same. At the time of writing this tutorial OpenCV has already released the 4.0.1 version three months back, but I decided to stick on to the previous version that is 4.0.0 since the new version had some problem in getting compiled.PrerequisitesBefore we dive in, I assume you have already installed the latest OS on your Raspberry PI and have access to it via SSH.

If not, follow the tutorial before proceeding. Here I am using Rasbian Stretch installed on Raspberry Pi 3.Pip Installing OpenCV on Raspberry PIAs we all know python has its own package manager called pip which can be used to easily add libraries for the python. And yes there is also a way to use PIP to install openCV within minutes on Pi, but sadly it did not work for me and for many others as well. Also installing through pip does not allow us to get full control over the OpenCV library, but still if you are looking for the quickest way then you might give this a try as well.Make sure pip is installed on your pi and is upgraded to latest version. Then enter the following commands on your terminal one by one sudo apt-get install libhdf5-dev libhdf5-serial-dev sudo apt-get install libqtwebkit4 libqt4-test sudo pip install opencv-contrib-python​This should install OpenCV on your Pi, if you are successful with this step then you can skip the tutorial and scroll down to Step 13 to check if OpenCV is installed properly with python. Else, take a deep breath and start following the tutorial below.Installing OpenCV 4 on Raspberry Pi using CMakeIn this method we will download the source package of OpenCV and compile it on our Raspberry Pi using CMake. Some people tend to install OpenCV on virtual environment so that they can use different version of python or OpenCV on the same machine.

The menu makes it easy to install software, but you might find that not all the software works well on the Raspberry Pi. It’s easy enough to try something, though, and remove it if it doesn’t do what you need. It’s all free.

Sudo dnf install python-devel python-opencv wxPython python-pip python-matplotlib pygame python-lxml redhat-rpm-config. On some older Linux systems, python-wxgtk3.0. On Raspberry Pi (Raspian) systems, the libxml2-dev package is required to be installed too. Then download and install MAVProxy via Pypi. Now since your SD card is ready, Boot your Pi. First thing you want to do is Enable Camera. To do this run. Sudo raspi-config. And chose Enable Camera (menu 6) also chose the correct speed for your Raspberry Pi from Overclock option (menu 8). Reboot your Raspberry Pi. Now its is time to Install python wrapper for OpenCV, to do this run. Sudo apt-get install python-opencv sudo pip install imutils. Now we are almost done. Let's test the Pi camera connected to Raspberry Pi for proper operation.

But I am not opting for that since I would like to keep this article short and also I don’t see any need for it anytime soon.Step 1: Before we begin let’s make sure the system is updated to the current version, to do this enter the following command sudo apt-get update && sudo apt-get upgradeThis should download any latest packages if available and install it. Any advice from experienced readers? When I execute step 12, make -j4, the Raspberry Pi will lockup.The symptoms of lockup, the Raspberry Pi green LED lites solid all the time, and the raspberry pi real time clock on Desktop stops keeing time, and no progress seen on make command%.I started with a 16Gb uSD card, but the first time using STEP 12 on the make step, the uSD card filled up.I got a fresh 32 Gb uSD card, installed NOOBs, and retry.In fact, I retried several times, reformatting the uSD card (somethimes quick format sometime full overwrite, using SD card format SW), installing Noobs, after reboot, then install openCV. Repeat after lockup.I have tried make -j1, make -j2, make - j3 AND make -j4. After some tries, after raspberry pi lockup, I just reboot and repeat STEP 12, it continues on, but never finishes before raspberry Pi lockup.I also am using both a Raspberry Pi 3B+ and a Raspberry Pi 3A, and they both behave the same way with this uSD card load.I am following instructions to the letter, and dont understand why the Raspberry Pi locks up. I really want to use this install procedure because the article explains this application very well, and is good for begineers.Please any advice?

Let’s walk through how to get Python 3.6 installed on Raspbian Linux for Raspberry Pi.I’m assuming you have a recent copy of Raspbian (Jessie) for your Raspberry Pi. If not, either run apt-get to update or download the latest iso.As I write this, the current distro of Raspbian (Jessie) includes Python 3.4.2. I had a specific requirement for 3.6.0. Here’s what I did to get it installed.

Note these instructions would also work for 3.6.1. Pre-requisitesOpen the terminal (command prompt) and run the following commands. These will install the pre-requisites. I have tried the suggested method of changing default python and it seems to work really well. It uses a command ‘update-alternatives’ which ‘maintains symbolic links determining default commands’.There are often recommendations not to mess with default python command because of system requirements. But when I’m introducing a complete beginner to the command line, programming, and python, the last thing I want to be distracted by is explaining why ‘print’ works in one place but not another. I just want to start with latest Python 3.

I’ll deal with the version details much much later.By the way, thanks Ben for an excellent, concise how-toLike.