In a very simple way, in order to achieve what you've refered you need to have a reference image, i.e. the bakground with the persons. Then if you have another image with the same background plus the persons you want to segment, if you subtract the two images the result will be one black image with only the persons on it.
A = imread(.../reference_image.jpg);
B = imread(.../test_image.jpg);
result = imsubtract(B,A);
I hope this have helped you.
Good luck!
Boothaya <sadheerav@gmail.com> wrote in message <4e515326-89e9-4116-8e76-a6230e9ee814@1g2000prd.googlegroups.com>...
> hi all
> i am new to matlab and i need to segment people from a video file.
> please help me the matlab version i use is R2007b.
> thanks in advance.
On Oct 12, 10:03=A0pm, "Filipe " <filipe.ti...@remove.this.sapo.pt>
wrote:
> Hi!
>
> In a very simple way, in order to achieve what you've refered you need to=
have a reference image, i.e. the bakground with the persons. Then if you h=
ave another image with the same background plus the persons you want to seg=
ment, if you subtract the two images the result will be one black image wit=
h only the persons on it.
>
> A =3D imread(.../reference_image.jpg);
> B =3D imread(.../test_image.jpg);
> result =3D imsubtract(B,A);
>
> I hope this have helped you.
>
> Good luck!
>
> Boothaya <sadhee...@gmail.com> wrote in message <4e515326-89e9-4116-8e76-=
a6230e9ee...@1g2000prd.googlegroups.com>...
> > hi all
> > i am new to matlab and i need to segment people from a video file.
> > please help me the matlab version i use is R2007b.
> > thanks in advance.
Thanks a lot Filipe.
Your method totally works.if u can guide me with how to mark the
people with a square, separated region etc. i mean when the video file
is being played the region has to be marked.i hope you understand my
problem. Please help me.
thanks a million. My task is to build a video survelliance application
and therefore i have to look if people are looking at the
camera.therefore the first step is segmenting people, and then i have
to target their eyes.
thanks again.
cheers
Just some questions.
What is the resolution of the surveillance cammera you're using? Will you be able to detect the persons' eyes with that resolution?
I think you could do a rough people detection (by image subtraction) as you've said and then detect their faces and in their faces detect their eyes...
In order to detect the faces you can use Haarclassifiers...
OpenCV implements this with great detail and it really works.
Perhaps you should try to read something about this subject and try to get a good background from where you can start more easily...
Good luck!
Boothaya <sadheerav@gmail.com> wrote in message <ec09ebbc-57e3-4dbe-9ffc-a5a30893b7e6@25g2000prz.googlegroups.com>...
> On Oct 12, 10:03=A0pm, "Filipe " <filipe.ti...@remove.this.sapo.pt>
> wrote:
> > Hi!
> >
> > In a very simple way, in order to achieve what you've refered you need to=
> have a reference image, i.e. the bakground with the persons. Then if you h=
> ave another image with the same background plus the persons you want to seg=
> ment, if you subtract the two images the result will be one black image wit=
> h only the persons on it.
> >
> > A =3D imread(.../reference_image.jpg);
> > B =3D imread(.../test_image.jpg);
> > result =3D imsubtract(B,A);
> >
> > I hope this have helped you.
> >
> > Good luck!
> >
> > Boothaya <sadhee...@gmail.com> wrote in message <4e515326-89e9-4116-8e76-=
> a6230e9ee...@1g2000prd.googlegroups.com>...
> > > hi all
> > > i am new to matlab and i need to segment people from a video file.
> > > please help me the matlab version i use is R2007b.
> > > thanks in advance.
>
>
> Thanks a lot Filipe.
> Your method totally works.if u can guide me with how to mark the
> people with a square, separated region etc. i mean when the video file
> is being played the region has to be marked.i hope you understand my
> problem. Please help me.
> thanks a million. My task is to build a video survelliance application
> and therefore i have to look if people are looking at the
> camera.therefore the first step is segmenting people, and then i have
> to target their eyes.
> thanks again.
> cheers
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