Linaro + opencv + exercise

Exercises with Ubuntu-Linaro

1º Load an image

2º Contours

	libjpeg	libjpeg-turbo	Linaro
Load	199	63	126
2Gray	61	45	57
Trheshold	12	12	12
Create	32	11	10
find	53	31	71
Draw	47	47	87
Total	404	209	363

 3º Search one pattern

	libjpeg-turbo	Linaro
Load Source	11	6
Load Pattern	11	6
Search	488	487
Total	510	499

4º Haar-Features

The time is quite similar

Conclusion 

The ubuntu-linaro is a little bit more fast, but it'snt a big difference.

I prefer to use raspbian cause it has a big community, and the information it's easy to find, and may be it has more things that I need, but I feel comfortable  in raspbian than in ubuntu-linaro.

But I know that I'm not taking all the power of the cubieboard, I've in mind to improve the compilation using cross compilation, and take advantage of the NEON acceleration, but I'll do latter when I've more knowledge 

Linaro + openCV

Well at the beginning of the blog some one, tell me to use ubuntu-linaro, wich is more focused to ARM processors

The Linaro use the library libjpeg-turbo directly and not is necessary to install as I do in Raspbian + opencv + libjpeg-turbo

The installation of Ubuntu-Linaro is quite simple, and can be downloaded from the berryboot, in the same way as I did with Raspbian.

Installing OpenCV

Well I find some troubles when I tried to install opencv in Linaro.

When I added the requisists to install openCV

sudo apt-get -y install build-essential cmake pkg-config libpng12-0 libpng12-dev libpng++-dev libpng3 libpnglite-dev zlib1g-dbg zlib1g zlib1g-dev pngtools libtiff4-dev libtiff4 libtiffxx0c2 libtiff-tools

sudo apt-get -y install libjpeg8 libjpeg8-dev libjpeg8-dbg libjpeg-progs ffmpeg libavcodec-dev libavcodec53 libavformat53 libavformat-dev libgstreamer0.10-0-dbg libgstreamer0.10-0 libgstreamer0.10-dev libxine1-ffmpeg libxine-dev libxine1-bin libunicap2 libunicap2-dev libdc1394-22-dev libdc1394-22 libdc1394-utils swig libv4l-0 libv4l-dev

I had to add this library, if not our programs will give us errors, but there are a lot of information in google to solve the problems.

sudo apt-get install libgtk2.0-dev 

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_EXAMPLES=ON ..

and after that continue the installation of openCV