hi, i am new to image processing and matlab. how can i recognize particular faces in a video stream? i have already divided the video into frames and i have detected the faces. but now how can i recognize particular faces in that frame? whether shoul

hi, i am new to image processing and matlab. how can i recognize particular faces in a video stream? i have already divided the video into frames and i have detected the faces. but now how can i recognize particular faces in that frame? whether should i use a database for that?

Answer 1

[Image Analyst]

See Brett Shoelson's face recognition app about half way down his File Exchange: http://www.mathworks.com/matlabcentral/fileexchange/index?term=authorid%3A911

Answer 2

[Nikolay S.]

Hi there.

That is a hard question, with an answer worth lots of $$$.

But briefly saying- you got many methods to find a face in an image. Lets say you've used Viola & Jones, and got the face. You want to know who it belongs to, right? You must have a database, with tagged faces- faces encoded into some feature vector, labeled with names. Now, if a face found by a face detector is similar to one of the database elements- it is probably it. If not it is either a new person, or the face has undergone a change against which the feature vector is not robust (light, glasses, beard, mustache, haircut, pose scale etc..). Regarding the real question to be asked- what is the best feature space to use- a lecture given by Prof. Wolf on " Deep learning " presented very impressive results. Face recognition vai LBP works nicely. Google scholar is fool with papers. You need to choose and try some...

Best regards,

 Nikolay

[Image Analyst]

Virtually all of the image processing papers are collected in Vision Bibliography, including this section on Face Recognition: http://www.visionbib.com/bibliography/contentspeople.html#Face%20Recognition,%20Detection,%20Tracking,%20Gesture%20Recognition,%20Fingerprints,%20Biometrics