MATLAB Central Newsreader - shape & texture extraction from face image

shape & texture extraction from face image

Nive S — Fri, 10 Oct 2008 11:41:01 -0400

Hi
I m doin project in age estimation in matlab. I m extracting features shape and texture from face image, can anyone have idea of doing this if so , please help me moreover i m new to this area and matlab.

Re: shape & texture extraction from face image

Dave Robinson — Fri, 10 Oct 2008 12:39:02 -0400

"Nive S" <xyz@yahoo.com> wrote in message <gcnf0d$7tn$1@fred.mathworks.com>...
> Hi
> I m doin project in age estimation in matlab. I m extracting features shape and texture from face image, can anyone have idea of doing this if so , please help me moreover i m new to this area and matlab.

Something I have never tried - so this will need some research on your part.

1) Switch your colour space to normalized Red, human skin is relatively racially invariant in this space.

2) Use a threshold value to isolate the face - you will need to experiment to find the optimum value, from this form a binary image (or mask) of the facial position, and extract a greyscale image of the original face.

3) Look up Law's texture analysis on the web, to undertake a texture estimation on the web.

4) Alternatively investigate the use of Wavelets, I would imagine that the 'wrinkles' on an old persons face would provide more information in the fine scale regions than would a smooth skin of a young person - of course you may get thrown by beards etc.

5) Investigate neural nets for processing the texture/wavelet data for age classification.

Hope that helps

Dave Robinson

Re: shape & texture extraction from face image

Badri — Tue, 23 Dec 2008 04:31:04 -0500

Re: shape & texture extraction from face image

ImageAnalyst — Tue, 23 Dec 2008 05:15:27 -0500

On Dec 22, 11:31=A0pm, "Badri " <badrionl...@gmail.com> wrote:
> "Nive S" <x...@yahoo.com> wrote in message <gcnf0d$7t...@fred.mathworks.c=
om>...
> > Hi
> > I m doin project in age estimation in matlab. I m extracting features s=
hape and texture from face image, can anyone have idea of doing this if so =
, please help me moreover i m new to this area and matlab.
>
> Hi Friend,
> =A0 =A0 =A0 =A0 =A0 =A0We are also doing the same project.We too are stuc=
k in the middle.Can you please help us by providing any source code you hav=
e executed successfully or any source of valuable information(books/weblink=
s) regarding this to my mail id:badrionl...@gmail.com.
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Thanks in Advance. =A0

---------------------------------------------------------------------------=
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This may interest you:
http://www.vision-systems.com/display_article/345038/19/none/none/Depar/Vis=
ion-enables-greenhouse-automation

"Imaging software estimates age

"People who hope to keep their age a secret won=92t want to go near a
computer running this software. In addition to performing tasks such
as security control and surveillance monitoring, age-estimation
software also could be used for electronic customer relationship
management or to target specific audiences with advertising, said
Thomas S. Huang, the professor of electrical and computer engineering
at the University of Illinois (Urbana-Champaign, IL, USA; www.illinois.edu)=
.

"Like an age-guesser at a carnival, the computer software can fairly
accurately estimate a person=92s age. But unlike age-guessers, who can
view a person=92s body, the software works by examining only the
person=92s face. Age-recognition algorithms could stop underage drinkers
from entering bars, prevent minors from purchasing tobacco products
from vending machines, and deny children access to adult web sites,
said Huang, who leads the Image Formation and Processing group at the
university=92s Beckman Institute. The software can estimate ages from 1
year to 93 years. The software=92s accuracy ranges from about 50% when
estimating ages to within 5 years, to more than 80% when estimating
ages to within 10 years."

Prof. Thomas Huang'w web site:
http://www.beckman.illinois.edu/directory/t-huang1

100% accuracy is something that can never be achieved because, as you
know, some people just look younger or older than they really are.
For example, they may have wrinkles, sagging facial skin, or hair
color that look like someone of a much different age. So there is a
"visual age appearance" and their "true chronological age." And
they're roughly correlated but there is lots of variance, depending on
genetics, sun exposure, surgical procedures, smoking frequency,
smiling frequency, air temperature and humidity, etc.

Good luck,
ImageAnalyst

Re: shape & texture extraction from face image

Badri — Wed, 21 Jan 2009 08:42:02 -0500

"Dave Robinson" <dave.robinson@somewhere.biz> wrote in message <gcnid6$d9f$1@fred.mathworks.com>...
> "Nive S" <xyz@yahoo.com> wrote in message <gcnf0d$7tn$1@fred.mathworks.com>...
> > Hi
> > I m doin project in age estimation in matlab. I m extracting features shape and texture from face image, can anyone have idea of doing this if so , please help me moreover i m new to this area and matlab.
>
> Something I have never tried - so this will need some research on your part.
>
> 1) Switch your colour space to normalized Red, human skin is relatively racially invariant in this space.
>
> 2) Use a threshold value to isolate the face - you will need to experiment to find the optimum value, from this form a binary image (or mask) of the facial position, and extract a greyscale image of the original face.
>
> 3) Look up Law's texture analysis on the web, to undertake a texture estimation on the web.
>
> 4) Alternatively investigate the use of Wavelets, I would imagine that the 'wrinkles' on an old persons face would provide more information in the fine scale regions than would a smooth skin of a young person - of course you may get thrown by beards etc.
>
> 5) Investigate neural nets for processing the texture/wavelet data for age classification.
>
> Hope that helps
>
> Dave Robinson

hi Mr.Dave,
we are students, we r doin age estimation project We have done face
detection,face normalization.how to perform wavelet transform to facial regions images(which transform eg fourier can you help with function names.?how 2 extract
wrinkles ???
thanx in advance