#!/bin/bash

# STATUS A/O 2016 02 13: untested, indeterminate

# based on https://barclaysapps.wordpress.com/2014/07/06/openalpr-install-for-rpi-and-udoo-and-tre-and-yun/ ,
# http://lukagabric.com/raspberry-pi-license-plate-recognition/, and updated for new packages.
# there are other random notes and googled pages that also informed this tutorial whihc may not be specifically referenced.
#This is not optimized for space or whatever, but does work. well, not as of 2016 01 03 but working to fix that)
# discussion is at https://groups.google.com/forum/#!topic/openalpr/-vckIsPe618: please contribute if you can, and ask questions if you # # have them
# thanks to Timis for tips and hints...

# how to read:

# this is a heading, as denoted by the:
# on a line where you see some text -> some more text
# this is the text in the original tutorial -> this is what you should type instead
# note: this is a note: don't type this.
# if you see a line like this ; or // anything after the ';' or the '//' including the ';'  or '//' is a note and should not be typed

# installed and tested on a raspberry pi 2 model B 1GB using raspbian installed via noobs on a 32 GB memory card.
# note that an 8GB card will fill before this tutorial ends, so you will need a card bigger than that.
# Not tested on a 16GB card so no idea if that will work or not.

# download this tutorial:
# wget https://gist.github.com/amstanley/9da7febc9a3e3c2228ee/archive/a670894f0c0162c3f2efdcd93e527c59628f6c90.zip
# unzip 655ca8d3ca8eb17a3376123950de8445fb83a404.zip

# make it executable (chmod +x filename) so it can run as a script and then run it. 
# when it is done resume manual entry at line 112.

# Create a log file of the build as well as displaying the build on the tty as it runs
exec > >(tee build_gstreamer.log)
exec 2>&1

# Set Up the camera to stream mjpeg. to do this follow this tutorial exactly:
# http://www.linux-projects.org/modules/sections/index.php?op=viewarticle&artid=14
# the steps are: 

curl http://www.linux-projects.org/listing/uv4l_repo/lrkey.asc | sudo apt-key add -

# Add the following line to the file /etc/apt/sources.list (type sudo nano /etc/apt/sources.list) :
sudo -- sh -c "echo deb http://www.linux-projects.org/listing/uv4l_repo/raspbian/ wheezy main >> /etc/apt/sources.list"
 
# Update and Upgrade the Pi, otherwise the build may fail due to inconsistencies
sudo apt-get update && sudo apt-get upgrade -y --force-yes

# Get the required libraries
sudo apt-get install -y --force-yes autoconf build-essential automake libtool  git cmake pkg-config      \
                                    libpng12-dev libjpeg-dev libtiff5-dev zlib1g-dev libjasper-dev       \
                                    libavcodec-dev libavformat-dev libswscale-dev libv4l-dev             \
                                    libxvidcore-dev libx264-dev libgtk2.0-dev libatlas-base-dev          \
                                    gfortran python2.7-dev python3-dev                                   \
                                    libcurl4-openssl-dev liblog4cplus-1.0-4 liblog4cplus-dev uuid-dev    \
                                    uv4l uv4l-raspicam uv4l-raspicam-extras uv4l-server uv4l-mjpegstream \
                                    gstreamer1.0

# Clone openalpr:
cd /home/pi 
git clone https://github.com/openalpr/openalpr.git

# Create a directory and download libraries:
cd openalpr
mkdir libraries
cd libraries

git clone https://github.com/tesseract-ocr/tesseract.git
git clone https://github.com/tesseract-ocr/tessdata.git
wget http://www.leptonica.org/source/leptonica-1.71.tar.gz
# wget http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.11/opencv-2.4.11.zip 
# wget http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip # trying alternate versions  as 2.4.11 fails to compile with ffmpeg.
wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.1.0.zip
wget -O opencv_contrib.zip https://github.com/Itseez/opencv_contrib/archive/3.1.0.zip


# extract the packages:
tar -zxvf leptonica-1.71.tar.gz
# unzip opencv-2.4.9.zip
unzip opencv.zip
unzip opencv_contrib.zip

# clean up the downloads
rm leptonica-1.71.tar.gz
# rm opencv-2.4.9.zip
rm opencv.zip
rm opencv_contrib.zip

# compile leptonica:
cd leptonica-1.71
./configure
make -j4                
sudo make install

# compile tesseract:
cd ../tesseract
sudo apt-get install -y --force-yes autoconf automake libtool
./autogen.sh   # script crapped here, missing aclocal. ran sudo apt-get install -y --force-yes autoconf automake libtool, seemed to fix it.
./configure
make -j4
sudo make install
sudo ldconfig
export TESSDATA_PREFIX=/home/pi/openalpr/libraries/tessdata

# installing openCV 3 with Python 2.7
# see http://www.pyimagesearch.com/2015/10/26/how-to-install-opencv-3-on-raspbian-jessie/ 
# as referenced by timis at  https://groups.google.com/d/topic/openalpr/-vckIsPe618

wget https://bootstrap.pypa.io/get-pip.py
sudo python get-pip.py
sudo pip install virtualenv virtualenvwrapper
sudo rm -rf ~/.cache/pip
echo 'export WORKON_HOME=$HOME/.virtualenvs' >> ~/.profile
echo 'source /usr/local/bin/virtualenvwrapper.sh' >> ~/.profile
source ~/.profile
mkvirtualenv cv
source ~/.profile
workon cv
pip install numpy

cd /home/pi/openalpr/libraries/opencv-3.1.0
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE \
	-D CMAKE_INSTALL_PREFIX=/usr/local \
	-D INSTALL_C_EXAMPLES=OFF \
	-D INSTALL_PYTHON_EXAMPLES=ON \
	-D OPENCV_EXTRA_MODULES_PATH=/home/pi/openalpr/libraries/opencv_contrib-3.1.0/modules \
	-D BUILD_EXAMPLES=ON ..
make -j4
sudo make install
sudo ldconfig
cd ~/.virtualenvs/cv/lib/python2.7/site-packages/
ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so

# Compile openALPR:
cd /home/pi/openalpr/src

# nano CMakeLists.txt
# add the following lines in the section near the top that has SET() statements
# SET(OpenCV_DIR "/home/pi/openalpr/libraries/opencv-2.4.11/release")
# SET(Tesseract_DIR "/home/pi/openalpr/libraries/tesseract")
# do this using sed
sed -i '11 i SET(Tesseract_DIR "/home/pi/openalpr/libraries/tesseract")' /home/pi/openalpr/src/CMakeLists.txt
sed -i '11 i SET(OpenCV_DIR "~/openalpr/libraries/opencv-3.1.0/build")' /home/pi/openalpr/src/CMakeLists.txt 

cmake ./
make -j4
sudo make install
sudo cp -r /usr/local/lib/* /lib 
# sudo cp /home/pi/openalpr/libraries/opencv-2.4.11/release/lib/* /lib
# note: seems like this last step is just a path issue... surely better way to do this)

# test the library (from https://github.com/openalpr/openalpr/wiki/Compilation-instructions-(Ubuntu-Linux)):
wget http://plates.openalpr.com/ea7the.jpg
alpr -c us ea7the.jpg

# result: 
# plate0: 10 results
#    - EA7THE	 confidence: 92.4795
#    - EA7TBE	 confidence: 84.0421
#    - EA7TRE	 confidence: 83.1932
#    - EA7TE	 confidence: 82.0527
#    - EA7T8E	 confidence: 81.7845
#    - EA7TME	 confidence: 80.8062
#    - EA7THB	 confidence: 76.6468
#    - EA7TH6	 confidence: 76.6153
#    - EA7TH	 confidence: 75.2232
#    - EA7TBB	 confidence: 68.2095

# wget http://plates.openalpr.com/h786poj.jpg
# alpr -c eu h786poj.jpg