Parametric image registration: how to find set of parameters

Hi all,

I want to calculate the translation parameters from a transformed image. I have the original image and I can obtain the error function by E= abs(Inew-Ioriginal)^2. I have to take derivative of this error function wrt the parameters. And I am not sure how to take derivative wrt the parameters. Can anyone help?

Please see the lecture for details:

http://cdn.intechopen.com/pdfs-wm/297.pdf

Thanks in advance.

Answer 1

[Matt J]

That will be very hard to build from scratch in MATLAB. The quicker route is to just use imregtform().

[Matt J]

Or, if it's just a translation, maybe you can just use a correlation-based method, like normxcorr2.

[ImageProcNaive]

Can't use any built in function.

[Matt J]

You will never be able to avoid builtin functions for something as complicated as this. If you're allowed to use fft2, you could code your own correlation-based registration algorithm.