openbr on ubuntu12.04 facial recognition [Compile from source!!!]

翻译来源：http://www.cnblogs.com/spaceship9/p/4096383.html

OpenBR 是一个很好的人脸检测（facial detecting）工程。  

System：linuxmint 13 X86_64

人脸识别、表情/性别/年龄/检测

website：

github：

警告：

只需要尝试下面比较酷的东西，安装教程：http://openbiometrics.org/doxygen/latest/installation.html

但是由于lib/package的原因上面教程是针对Ubuntu13.04的。

结论：你需要安装或处理一系列的libs/packages在你编译openbr之前。

准备（Materials）：

（1）cmake（版本高于2.8.11）

（2）QT5（版本高于5.0）

（3）opencv sources files and libs

step1、编译cmake（compiling cmake）

git clone https://github.com/Kitware/CMake
cd CMake
./configure --prefix=/usr/local
make
make install
ldconfig

step2、安装QT5（installing QT

wget -c http://download.qt-project.org/official_releases/qt/5.3/5.3.2/qt-opensource-linux-x64-5.3.2.run
chmod +x qt-opensource-linux-x64-5.3.2.run
sudo ./qt-opensource-linux-x64-5.3.2.run

# Then a wizard window would jump out, install it as you wish . 
# By default a /opt/Qt5.3.2/ will be the default directory

step3、编译opencv（building opencv）

（注意：openbr 0.5或更早版本不能工作在opencv3.0+上。如果用opencv3.0+编译openbr，openbr将会报出如下错误）

In file included from /usr/local/src/openbr/build/stasm/src/external_stasm/stasm/stasm/src/stasm_lib.cpp:7:0:
/usr/local/src/openbr/build/stasm/src/external_stasm/stasm/stasm/include/misc.h:422:1: error: ‘CvScalar’ does not name a type
make[5]: *** [stasm/CMakeFiles/stasm.dir/stasm/src/stasm_lib.cpp.o] Error 1
make[4]: *** [stasm/CMakeFiles/stasm.dir/all] Error 2
make[3]: *** [all] Error 2
make[2]: *** [stasm/src/external_stasm-stamp/external_stasm-build] Error 2
make[1]: *** [openbr/CMakeFiles/external_stasm.dir/all] Error 2
make: *** [all] Error 2

所以，我们需要安装opencv2.4.9。下载链接http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip/download

unzip opencv-2.4.9.zip -d /usr/local/src # or the path you store source files
cd /usr/local/src/opencv-2.4.9/
# Then use 'cmake' to compile opencv sources
mkdir release
cd release
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..
#

# Notice when building, cmake would look for some 3rdparty modules from internet. If you see something "-- ICV: Downloading ippicv_linux_20141027.tgz... " , do not be panic, take your time. A cup of coffee is calling you :)
sudo make
sudo make install

step4、编译openbr（building openbr）——更新的cmake，跨平台的QT5，匹配的opencv

git clone https://github.com/biometrics/openbr.git
cd openbr
git checkout master # Or here git checkout 0.5 ## coz some times master changes a lot  LOL
git submodule init
git submodule update

# It will cost your minutes to download those sub-modules. Take that easy.

# Then, try to build the openbr 
sudo cmake -DCMAKE_PREFIX_PATH=/opt/Qt5.3.2/5.3/gcc_64 -DOpenCV_DIR=/usr/local/src/opencv-2.4.9/release -DCMAKE_BUILD_TYPE=Release .. 
sudo make j4
sudo make install

step5、编译opencv GUI（building the openbr GUI）

Hack OpenBR!
Open Qt Creator IDE
$ qtcreator &
From the Qt Creator "File" menu select "Open File or Project...".
Select "openbr/CMakeLists.txt" then "Open".
Browse to your pre-existing build directory "openbr/build" then select "Next".
Select "Run CMake" then "Finish".
You're all set! You can find more information on Qt Creator here http://qt-project.org/doc/qtcreator if you need.