How to construct 3D model using images of the face

[namalak]

does any body know how to construct a 3d face model using 4 images of the face (front, back, right side, left side). I'm using this model for a face recognition system.

[Cristi_Neagu]

You can use FaceGen. There's a free version. I can't exactly remember the limitations, but one of them was that it writes FaceGen on the forehead of the model. It exports to Blender and 3D Studio Max.

[namalak]

can it be implemented using eigenface in opencv? Is it possible to use convex hull type methods for this.

[Cristi_Neagu]

I'm sorry, but i have absolutely no idea what you're talking about
I ran across this program about a year ago, when toying around with the character generator in TESIV Oblivion. Not really went that in depth with it. But you know what they say: the truth is out there...

[namalak]

thanx Cristi. do you think that this constructed face model by facegen can be used for face recognition

[Cristi_Neagu]

I never tried it actually. It generates a surface, complete with texture (from the photos that you feed it). It's as usable as anything you'd be able to create in Blender or 3DSMax. I don't know about Blender, but 3DSMax can export .igs and.stl files, which you can put into any 3D software.
Just take a look for yourself. You can decide on your own how good it is for your application: http://www.facegen.com/modeller.htm

[namalak]

what do you know about texture mapping

[Cristi_Neagu]

Not much... I only found out about that program out of pure curiosity, not because i actually work with this stuff. Also, i'm not that good at 3d modeling either.

[namalak]

does the output of faceGen can be used with opencv? I mean I need this 3D model for further recognition process in opencv.

[Cristi_Neagu]

Don't know about that, but all i can say is that Google is your friend. In other words, start finding the answers on your own. After all, it is your project, isn't it?