Good Night,

I was reading about Facial Recognition and found pam-face-authentication. You must have this packages to use it:
Opencv 1.0.0 +
libpam (dev version)
libX11 (dev version)
Qt4.5 (dev version)

So I decided to try it. Let's start.

Open CV - How to Install
This is a resume of what I did

1. Install the build-essential

$ sudo apt-get install build-essential

2. Access synaptic and search for "CMake", Subversion, GTK+ 2.x, libpng, zlib, libjpeg, libtiff, libjasper, python 2.3+, swig. Don't forget to install the -dev packages too

3. Install libavformat-dev

$ sudo apt-get install libavformat-dev

4. Download the opencv library

$ svn co https://opencvlibrary.svn.sourceforge.net/svnroot/opencvlibrary/tags/latest_tested_snapshot

5. Go to the download folder

$ cd latest_tested_snapshot/opencv

6. Create dir release

$ mkdir release

7. Access it

$ cd release

8. Use cmake (Don't have sure if .. is necessary.)

\
$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_PYTHON_SUPPORT=ON ..

9. Make it

$ make

10. Install it

$ sudo make install

11.

$ sudo ldconfig -v

12.

$ cd bin

13. Verify if the dependencies works.

$ ./cxcoretest

Now go to Synpactic again and look for Libpam, libX11, Qt4.5 (don't forget the -dev version)

How to install pam-face-authentication? Install PAM-FaCE-AUTH (reference)

1. Download pam-face-authentication (download the last version in my time I used 0.3)

$ wget http://pam-face-authentication.googlecode.com/files/pam-face-authentication-0.3.tar.gz

2. Extract it.

$ tar -xf pam-face-authentication-0.3.tar.gz

3. Go to extracted folder

$ cd pam-face-authentication-0.3

4. Create build

$ mkdir build

5. Go to folder

$ cd build

6. (Don't have sure if .. is necessary.)

$ cmake -D CMAKE_INSTALL_DIR=/usr ..

$ make

8.

$ sudo make install

Access Applications - Other - QtFacetrainer. Configure it. Go to Advanced and test it.

If you want to use it when somebody uses the "su" command. Edit "/etc/pam.d/su"

$ sudo vi /etc/pam.d/su

Add this line in the begin of the file

auth sufficient pam_face_authentication.so enableX

Other reference