Thread Subject: face extraction from an image

hello
i want to know how can i extract the face from a given image; when i input an image for the whole body how can i extract the face and just the face and save the extarction information as a new image?
is my quistion clear??

On Mar 14, 10:45 am, "fida khalid" <fida2_aburma...@hotmail.com>
wrote:
> hello
> i want to know how can i extract the face from a given image; when i input an image for the whole body how can i extract the face and just the face and save the extarction information as a new image?
> is my quistion clear??

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Well sort of. But you didn't say if you're using an algorithm, which
one is it, or if you even looked. I believe there are several face
detection apps uploaded to the file exchange. Have you looked at
them? Have you contacted the authors? Have you done a more general
web search? There must be hundreds of algorithms - I have no idea
which one is best. I'm sure each one that is published will claim to
be the best. If you want a list of them all, go here:
http://iris.usc.edu/Vision-Notes/bibliography/contents.html
and look at section 21:
"21 Face Recognition, Detection, Tracking, Gesture Recognition,
Fingerprints, Biometrics "

If you have a question related to MATLAB programming specifically,
rather than an image processing algorithm, then come back here with
your code.

Hi Fida,

I suggest you to look into MATLAB Central as a start. Here is something that
is similar to what you are asking for:

http://www.mathworks.com/matlabcentral/fileexchange/11073-face-detection-system

If your question is however about cropping the face from an image to store
it somewhere else for preprocessing purposes, then an easy way to do this
would be using

Adobe Photoshop's Lasso Tool as a mean to do that.
http://help.adobe.com/en_US/Photoshop/11.0/WSfd1234e1c4b69f30ea53e41001031ab64-76f8a.html

Hope this helps,
Murad




"fida khalid" <fida2_aburmayis@hotmail.com> wrote in message
news:hnispi$g1a$1@fred.mathworks.com...
> hello
> i want to know how can i extract the face from a given image; when i input
> an image for the whole body how can i extract the face and just the face
> and save the extarction information as a new image?
> is my quistion clear??
>

good evning Mr Murad
and thank you a lot for yr sugestions , i will see this then i will told you the new :D
thnaxxxxxxxxx
"Murad Abu-Khalaf" <mabukhal@mathworks.com> wrote in message <hnlasl$fpf$1@fred.mathworks.com>...
> Hi Fida,
>
> I suggest you to look into MATLAB Central as a start. Here is something that
> is similar to what you are asking for:
>
> http://www.mathworks.com/matlabcentral/fileexchange/11073-face-detection-system
>
> If your question is however about cropping the face from an image to store
> it somewhere else for preprocessing purposes, then an easy way to do this
> would be using
>
> Adobe Photoshop's Lasso Tool as a mean to do that.
> http://help.adobe.com/en_US/Photoshop/11.0/WSfd1234e1c4b69f30ea53e41001031ab64-76f8a.html
>
> Hope this helps,
> Murad
>
>
>
>
> "fida khalid" <fida2_aburmayis@hotmail.com> wrote in message
> news:hnispi$g1a$1@fred.mathworks.com...
> > hello
> > i want to know how can i extract the face from a given image; when i input
> > an image for the whole body how can i extract the face and just the face
> > and save the extarction information as a new image?
> > is my quistion clear??
> >
>

On Mar 14, 10:45 am, "fida khalid" <fida2_aburma...@hotmail.com>
wrote:
> hello
> i want to know how can i extract the face from a given image; when i input an image for the whole body how can i extract the face and just the face and save the extarction information as a new image?
> is my quistion clear??

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Check chapter 14 in Richard Szeliski's prerelease book:
http://research.microsoft.com/en-us/um/people/szeliski/Book/drafts/SzeliskiBook_20100324_draft.pdf

hi Mr.Murad;
i have the same problem as Mr.Fida posted.i m working on class attendance sytem using image processing.i have extracted faces of students from a sample class group photo now how should i exactly crop faces to save these face images and compare each picture with students images already storeed in database and make the attendance decision.