Re: Face recognition in GDM ...

[José Miguel Buenaposada Biencinto <jmbuenaposada escet urjc es>]

Thanks a lot for your advise, I'm only a long time GNU/Linux user and not
really known very much how to program specifically for Linux.

I'm thinking in giving the posibility to the user (and to debug the vision
algorithms) of seeing the captured video stream in a window with the
detected/recognized faces highlighted. In this case I supouse we have to
modify the GDM user interface, haven't we? How do you think is the
best way (in the sense of minimum number of changes) of modify the
GDM user interface?

Thanks a lot for your help. You have been quite helpfull.
Jose M. Buenaposada.

Bob Doolittle wrote:

> Hi Jose,
>
> Just a note that the right way to do any kind of
> biometric authentication is through the use of the
> Pluggable Authentication Module framework (PAM).
> GDM will work with PAM, by calling
> pam_authenticate().  You can write a PAM module
> that implements pam_sm_authenticate(), and put
> whatever fun stuff you want into it, and then
> create a PAM stack in pam.conf that either uses
> this module in isolation for gdm or combine it
> with a module that acquires a password or uses
> a smartcard or does something else useful.
>
> Do not consider modifying GDM code directly
> for this purpose, a PAM module would be much
> more generally useful (for instance it could be used
> to unlock a screen-lock program as well as log in).
>
> It's easier to test, too.  You can write a very simple
> PAM client that calls pam_authenticate and debug
> your code outside of the GDM framework, then
> drop it in by configuring pam.conf when it's ready.
>
> Regards,
>   Bob
>
> José Miguel Buenaposada Biencinto wrote:
>
> > Hi to all GDM developers,
> >
> > I'm a researcher in Computer Vision and I'd like to add some sort of 
> > face recognition
> > sytem to the Linux login. The idea is to use real-time face 
> > recognition throught a video
> > camera to select the right user's name from a little database 
> > containing an image of
> > each user. The user, of course, will have to type the password but 
> > not the login name
> > (for extra security). I'm thinking in implementing one of the state 
> > of the art face detectors
> > and face recognition algorithms (as it will not be the main user's 
> > identification method,
> > as the passwd will remain in place, it has not to be very sofisticated).
> >
> > The idea is to be developed within a master thesis of one of our 
> > students. What
> > I'd like to know, before even look for a student to do it, is what do 
> > you think
> > (GDM developer) will be the best way to modify the GDM code?, the 
> > place in the
> > code to loook for? what to modify with the minimum impact in 
> > stability? What version
> > of the code is best to start? And what ever do you think will be 
> > interesting ...
> > I have not even taken a look into the GDM code yet.
> >
> > I think it will be very cool to have such a thing as face recogtion 
> > in the linux login
> >
> > Best regards.
> > JM.
>
>
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Jose Miguel Buenaposada Biencinto
Escuela Superior de Ciencias Experimentales y Tecnologia (ESCET).
Universidad Rey Juan Carlos
C/ Tulipan, s/n. E-28933 Mostoles. Madrid (Spain)
phone: (+34) 914888129
email: jmbuenaposada escet urjc es
web  : http://www.ia.escet.urjc.es/~jmbuena
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