recognition questions

[snooza]

 ???first is there a software on the computer where through the webcam it  can recognise your face and then say hello/ hi how are you today? that would be a real help.
also if i make this robot which incorporates my computer to work it. is there a software which would recognise hand gestures and gestures. such as pointing in a direction and the robot goes there and waving it waves back. also going even more advanced be able to detect a sad face/crying and say why are you sad.
thanks in advance (hopefully)
-snooza

[dunk]

so work has been done on recognising a specific face as a security feature. the computer won't unlock unless it recognises the user.
unfortunately all these systems can be defeated with a photograph of the correct user.
start reading here: http://www.face-rec.org/

OpenCV has face detection libraries if you just want to compile some code that can tell where a face is in an image.
http://opencv.willowgarage.com/wiki/FaceDetection


a project i've always thought about (but never got round to doing anything about) is have a webcam watch which direction your eyes are pointing and use that as a mouse input.
maybe a wink could be the equivalent of a button press.


dunk.

[snooza]

im afraid that doesnt really help if anyone else has an answer please give. i want it so the computer would say hello or how are who ever the person is.
and does anyone know the other part to?