Raspberry Pi 3 People Counter

https://www.youtube.com/watch?v=nu2k0yGO00Y&feature=youtu.be

Requirements

• Raspberry Pi 3 Model B v1.2
• Raspberry Pi OS Lite (https://www.raspberrypi.org/software/operating-systems/)
• OpenCV

OpenCV

More details on https://www.pyimagesearch.com/2019/09/16/install-opencv-4-on-raspberry-pi-4-and-raspbian-buster/

Expand filesystem

Dependences

$ sudo apt-get update && sudo apt-get upgrade
$ sudo apt-get install build-essential cmake pkg-config
$ sudo apt-get install libjpeg-dev libtiff5-dev libjasper-dev libpng-dev
$ sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
$ sudo apt-get install libxvidcore-dev libx264-dev
$ sudo apt-get install libfontconfig1-dev libcairo2-dev
$ sudo apt-get install libgdk-pixbuf2.0-dev libpango1.0-dev
$ sudo apt-get install libgtk2.0-dev libgtk-3-dev
$ sudo apt-get install libatlas-base-dev gfortran
$ sudo apt-get install libhdf5-dev libhdf5-serial-dev libhdf5-103
$ sudo apt-get install libqtgui4 libqtwebkit4 libqt4-test python3-pyqt5
$ sudo apt-get install python3-dev

Python virtual environment and NumPy

$ wget https://bootstrap.pypa.io/get-pip.py
$ sudo python3 get-pip.py

$ sudo pip install virtualenv virtualenvwrapper

Edit ~/.bashrc and append the following lines to the bottom of the file:

export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3
source /usr/local/bin/virtualenvwrapper.sh

Reload bashrc:
$ source ~/.bashrc

virtualenv and virtualenvwrapper

Create Python 3 virtual environment:
$ mkvirtualenv cv -p python3

Install the PiCamera API
$pip3 install "picamera[array]"

OpenCV Installation

$ cd ~
$ wget -O opencv.zip https://github.com/opencv/opencv/archive/4.5.1.zip
$ wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/4.5.1.zip
$ unzip opencv.zip
$ unzip opencv_contrib.zip
$ mv opencv-4.5.1 opencv
$ mv opencv_contrib-4.5.1 opencv_contrib

Edit the CONF_SWAPSIZ variable in /etc/dphys-swapfile CONF_SWAPSIZE=2048

$ sudo /etc/init.d/dphys-swapfile stop
$ sudo /etc/init.d/dphys-swapfile start

for work in Virtual Enviroment
$ workon cv

Install numpy
$ pip install numpy

configure build
$ cd /opencv
$ mkdir build
$ cd build
$ cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D OPENCV_EXTRA_MODULES_PATH=/opencv_contrib/modules \
-D ENABLE_NEON=ON \
-D ENABLE_VFPV3=ON \
-D BUILD_TESTS=OFF \
-D INSTALL_PYTHON_EXAMPLES=OFF \
-D OPENCV_ENABLE_NONFREE=ON \
-D CMAKE_SHARED_LINKER_FLAGS=-latomic \
-D BUILD_EXAMPLES=OFF ..

$ make -j4

$ sudo make install
$ sudo ldconfig

Postgresql

$ sudo apt-get install postgresql
$ sudo apt-get install python-psycopg2
$ sudo apt-get install libpq-dev

$ pip install psycopg2

Create Postgresql PI user
$ sudo su postgres $ createuser pi -P --interactive

Create database $ psql

create database peoplecounterdb;