How can I find the coordinate transformation between two different images?

[Lando]

Hi,

I'm trying to create a VI that should find the coordinate transformation between 2 images with 2 different coordinate system, but I'm not going anywhere.

There's anyone here that could know how to do it?

If so, please answer me. It's very important!

Thanks a lot!

[muks]

By co-ordinate transformation do you mean the shift?

[Lando]

It could be a rotation, a shift, a scaling or a combnation of two or three of them.

[Andrey_Dmitriev]

Hi, Lando,

You can use Fourier-Mellin transform for recovering shift, rotation and scale invariants from two images.

best regards,

Andrey.

[Lando]

Unfortunately it was not what I needed.

What I'm trying to do is to obtain the transformation between two images, so that to be able to apply it to other images.

[Andrey_Dmitriev]

Then I'm not fully understand, what you needed... Lets say, you have two images. One is shifted, rotated and scaled in comparizon with another one. You need to calculate shift, angle and scale factor between two images, and then apply this transformation to other images, isn't?

[Lando]

That's exactly what I meant. Do you know a way to do it?

[muks]

From what i understand you can use "co-ordiante system" vi.That will take a reference from an image and compare the subsequent image for their rotation,shift etc.HAve you tried this?

[Andrey_Dmitriev]

muks,

As far, as I can understand, Find Coordsys will give us the only shift and rotation, but not scaling factor.

Fourier Mellin Transform will give us shift, rotation and scale as well.

Otherwise there are different possible techniques available (Pattern Matching, Shapes Matching, etc). Which one will give acceptable result - depends from the given images.

Andrey.

[muks]

andrey you are right co-ordinate system will not give you scaling factor.