Hacks

#!/bin/bash

# this script can be used to fix and remove the opencv lib dependencies of 
# the codesys opencv package for raspberry pi
#

# first argument can be the full path to the opencv debian package
# if no argument is given, we try to find it in the home directory of the user

opencv_pkg=$1

if [ -z "$opencv_pkg" ];then
    echo "try to use local file";
    opencv_pkg=$(find ~ -name "codesys_raspi_opencv_V3.5.*" | tail -n 1)

fi

if [ ! -f "$opencv_pkg" ];then
    echo "package file not found. please pass the codesys opencv deb file as argument";
    exit -1;

fi 

newpkg=${opencv_pkg/codesys/codesys_nodeps}

echo "package: $opencv_pkg"

# now we unpack this deb package locally
echo "unpack into local folder"
dpkg-deb -R $opencv_pkg "codesys-raspi-opencv-pkg"

# now we can modify the dependency section of the deb package control file
echo "modify dependencies"
sed -i "s/^Depends:.*/Depends:/" "codesys-raspi-opencv-pkg/DEBIAN/control"

# now we pack it again into a deb file
echo "pack into new package: $newpkg"
dpkg-deb -b "codesys-raspi-opencv-pkg" "$newpkg"

# now we remove the temp folder
rm -rf "codesys-raspi-opencv-pkg"

echo "Showing info from new packaged without dependencies:"
dpkg-deb -I "$newpkg"

echo "done!"

#!/bin/bash

# script to download and compile 
# opencv from source in version 2.4.9
# that fits to the codesys package opencv
#
# only execute this directly on the raspberry (as we dont cross compile)
# and at the end we install the compiled libraries on this target
# 

#
# there are some build prerequisites
# sudo apt-get install build-essential git cmake pkg-config 
# these depend on the detailled config of opencv that you want to build:
# sudo apt-get install libjpeg8-dev 
# sudo apt-get install libtiff4-dev 
# sudo apt-get install libjasper-dev 
# sudo apt-get install libpng12-dev 
# sudo apt-get install libavcodec-dev 
# sudo apt-get install libavformat-dev 
# sudo apt-get install libswscale-dev 
# sudo apt-get install libv4l-dev 
# 
# the versions or numbers of the detailled packages might be slightly different to the mentioned ones. just try with autocompletion which ones work
#

# just a test if we are running on a raspi. if that does not work properly and you are sure that you are running
# on a raspi then just comment the next line:
if [ -z "$(grep 'BCM' /proc/cpuinfo)" ]; then 
    echo "execute this script only on a raspberry"; 
    exit -1
fi

echo "creating local working dir: opencv"
mkdir opencv
cd opencv;

if [ ! -f "2.4.9.1.zip" ]; then
    echo "downloading the sources from github"
    wget https://github.com/opencv/opencv/archive/2.4.9.1.zip
fi

echo "unzip the zip"
unzip 2.4.9.1.zip

echo "go into directory"
cd 2.4.9.1

echo "prepare compilation"
mkdir build
cd build

echo "call cmake"
cmake -DCMAKE_BUILD_TYPE=Release -DOPENCV_EXTRA_MODULES_PATH=. ..
echo "cmake done"

echo "now compile"
make all -j4
echo "compilation done"

echo "install now"
sudo make install 

echo "congrats, you made it until here"