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From: ImageAnalyst <imageanalyst@mailinator.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Gender detection
Date: Thu, 2 Jul 2009 18:16:10 -0700 (PDT)
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On Jul 2, 5:57 pm, "Sprinceana " <mihai...@yahoo.com> wrote:
> After I detect the face of a person which I stored in an axes component(guide matlab) and compute the haussdorf distance using that formula between the eyes for example(which represent the distance between two points)
>
> Formula for distance Hausdorff:
>
> distance_Hausdorff=sqrt( (x1-x2)*(x1-x2) + (y1-y2)*(y1-y2) ) ; for instance is the generalisde Pytagora theorem in analytical geometry. That works!
>
> My problem is now how can I determine if the person which I load the picture in axes component is a man or female.
>
> Any ideas of links or topics?
>
> Thanks!
----------------------------------------------------------------------
I like Tidman's response.  But this has been a well studied topic.  A
Google search on "male female face differences" turns up over 4
million hits.  There was even a famous article about it about 3-5
years ago.  I forget which - Nature or Scientific American or
something like that.  I don't know who are the most prominent
researchers in the field.  I saw one site where they could use sliders
to change a person's gender, ethnicity, and something else (age?) on a
continuous scale - very cool!  A theory was put forth many years ago
that the most beautiful face is the average of all faces, and that set
forth a flurry of experiments to see if that's true.  It's a
complicated subject but perhaps you'll find something.

But how can you say that is the Hausdorf distance?  You gave the
formula for a simple Euclidean distance - square root of the sum of
the squares.  Here's a link on Hausdorf distance that you might use to
better understand it:
http://cgm.cs.mcgill.ca/~godfried/teaching/cg-projects/98/normand/main.html
If you have the very special case of only two isolated points, you'd
be right, but the Hausdorf distance was made for shapes (collections
of points) and in that more general situation (which it was designed
for), your formula is wrong.


http://www.virtualffs.co.uk/difference%20examples.htm
http://www.theage.com.au/news/national/beautiful-computer-says-yes/2007/03/17/1174080223528.html
http://www.cs.cmu.edu/afs/andrew/scs/cs/15-463/f07/proj3/www/lisachan/
http://morph.cs.st-andrews.ac.uk//fof/index.html