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Forum index » Science and Technology » Math » num-analysis
That would be really cool
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Han de Bruijn
science forum Guru


Joined: 18 May 2005
Posts: 1285

PostPosted: Fri Jun 23, 2006 1:00 pm    Post subject: That would be really cool Reply with quote
Sorry. I forgot to post this in 'num-analysis' as well. In message

http://groups.google.nl/group/sci.math/msg/98abbde4d6534c63?hl=en&

David Petry writes:

Quote:
I haven't tried your programs, but I'm wondering what you mean by
"nearly the same". Does your program detect the parts of one picture
that may be a translation, rotation, magnification, slight distortion,
or color modification of parts of another picture?
That would be really cool if it did.

My old boss said to me: "Always proceed with small but certain steps".

It is demonstrated with the following software that it is possible, in
principle, to find the angle between two congruent pictures (squares).
So it is determined, actually, whether they have the same shape, apart
from a ROTATION. (But no, two-dimensional variances _won't_ help here,
because of symmetry. Most things are symmetrical by coincidence, huh?)

http://hdebruijn.soo.dto.tudelft.nl/jaar2006/KRACHTEN.ZIP (MS Windows)

Make a directory. Unzip in that directory. Run the executable Project2.

The gist of the method is as follows.

Assume there exists a non-singular (= renormalized) conservative force
field between the two pictures. Then minimize the energy. As always:

A little bit of Physics would be NO Idleness in Mathematics.

Han de Bruijn
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Martin Eisenberg
science forum beginner


Joined: 11 May 2005
Posts: 28

PostPosted: Fri Jun 23, 2006 10:27 pm    Post subject: Re: That would be really cool Reply with quote
Han de Bruijn wrote:

Quote:
Make a directory. Unzip in that directory. Run the executable
Project2.

Of course the forthcoming thing would be for you to make a directory
and zip that :)


Martin

--
Quidquid latine scriptum sit, altum viditur.
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