pixeltint

This repository contains the resources needed to execute the STEM Project Pixel Tint

Tested on the following hardware

1. Hardware: Raspberry Pi 4 Model B
2. Operating System: Raspbian Buster Full

Dependencies

Pixelizer

The pixelizer folder contains two files, namely, cartoon.py and pokeball.png. cartoon.py is a python script that utilizes on the PILLOW library to convert an image into a pixelized images with its respective greyscale output. An sample image "pokeball.png" has been provided to test out the python script.

Sample Output

Installing Pillow Library (with JPEG Support)

download and compile JPEG library

wget http://www.ijg.org/files/jpegsrc.v8c.tar.gz    
tar xvfz jpegsrc.v8c.tar.gz
cd jpeg-8c
./configure --enable-shared --prefix=$CONFIGURE_PREFIX
make
sudo make install

link respective libraries correctly - Raspberry Pi Only

sudo ln -s /usr/lib/arm-linux-gnueabi/libjpeg.so /usr/lib
sudo ln -s /usr/lib/arm-linux-gnueabi/libfreetype.so /usr/lib
sudo ln -s /usr/lib/arm-linux-gnueabi/libz.so /usr/lib

install rest of the libraries, as well as freetype and zlib

sudo apt-get install libjpeg-dev libfreetype6 libfreetype6-dev zlib1g-dev

install PILLOW

sudo pip3 install pillow 
or 
sudo pip3 install pil

Setting up Imageshow.show() preview

sudo apt install imagemagick

MQTT

The MQTT folder contain the following python file, student_pub.py, where it allows the raspberry pi to publish a MQTT Message to a broker, "gateway pi".

Installation

Install MQTT client

sudo apt install -y mosquitto-clients

To run python mqtt script, please install

sudo pip3 install paho-mqtt

If pip3 is not already installed

sudo apt install python3-pip