Angus angus151

OpenALPR for Ubuntu 18.04

This is a slightly modified update to Daniel Kornev's excellent post which goes into more detail about why building from source is necessary on 18.04. His post was missing a few dependencies that I didn't have installed namely cmake, opencv and pkg-config. The following steps should get you a working build of openalpr on a fresh install of Ubuntu 18.04.

If you're not working with a fresh install, this might be a good time to clean and update your system before proceeding. (Optional)

$ sudo apt update #fetch list of available updates
$ sudo apt upgrade #install updates – does not remove packages

	# Installs Home Assistant on VirtualBox following https://www.home-assistant.io/installation/linux
	# Install VirtualBox
	sudo apt-get -y install virtualbox
	# Create a new VM
	VBoxManage createvm --name homeassistant --register
	# Select OS type "Other Linux (64-bit)"
	VBoxManage modifyvm homeassistant --ostype Linux_64
	# Set RAM to 6GB (modify to your needs, TODO: make this an option, default value 2GB), video memory to 16MB (TODO: make this an option, default value 16MB)
	VBoxManage modifyvm homeassistant --memory 6144 --vram 16
	# 2 vCPUs (TODO: make this an option, default value 2)

	# test_camera.py
	#
	# Open an RTSP stream and feed image frames to 'openalpr'
	# for real-time license plate recognition.

	import numpy as np
	import cv2
	from openalpr import Alpr