i have a set of images in the database..
and i am given an image at hand..
now i have to retrieve an image match exactly as the image at hand.. 
can any one give me some suggestions..

Advance Thanks and wishes..

On Feb 12, 3:00=A0am, "Radhakrishnan Kandasamy"
<krishnanrock...@gmail.com> wrote:
> i have a set of images in the database..
> and i am given an image at hand..
> now i have to retrieve an image match exactly as the image at hand..
> can any one give me some suggestions..
>
> Advance Thanks and wishes..

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--------
You're kind of asking for two different things.

If you want to find an "image match exactly as the image" the best way
to do that is subtraction, after checking for agreement on number of
rows, columns, and color bands of course.  If the image matches
EXACTLY, the subtraction will have NO non-zero pixels.

On the other hand, if you want to use edge detection on the images and
then find approximate matches, then you might try Hausdorf distance
based image comparison.  See the bottom of this page:
http://cgm.cs.mcgill.ca/~godfried/teaching/cg-projects/98/normand/main.html
And, no, I don't have any demo code for this method.

Good luck,
ImageAnalyst

ImageAnalyst <imageanalyst@mailinator.com> wrote in message <80baa259-8edf-4276-9443-900fa8ca3161@n11g2000vbm.googlegroups.com>...
> On Feb 12, 3:00 am, "Radhakrishnan Kandasamy"
> <krishnanrock...@gmail.com> wrote:
> > i have a set of images in the database..
> > and i am given an image at hand..
> > now i have to retrieve an image match exactly as the image at hand..
> > can any one give me some suggestions..
> >
> > Advance Thanks and wishes..
> 
> -----------------------------------------------------------------------------------
> You're kind of asking for two different things.
> 
> If you want to find an "image match exactly as the image" the best way
> to do that is subtraction, after checking for agreement on number of
> rows, columns, and color bands of course.  If the image matches
> EXACTLY, the subtraction will have NO non-zero pixels.
> 
> On the other hand, if you want to use edge detection on the images and
> then find approximate matches, then you might try Hausdorf distance
> based image comparison.  See the bottom of this page:
> http://cgm.cs.mcgill.ca/~godfried/teaching/cg-projects/98/normand/main.html
> And, no, I don't have any demo code for this method.
> 
> Good luck,
> ImageAnalyst



I Thank you very much for your kind, valuable suggestion.. .. I will Try On It..  
Thanks again :)