FFT image registration method

Hello

I have a issue with FFT method for translation, rotation and scalling in image registration. Can U explain me how and why i use FFT method to check if e.g rotated image is the same as original image (my project include that i HAVE to use FFT method). I would be very gratefull if someone show me a Matlab code of how it should work properly, because i really dont have any idea how to start this. Thanks for all replies.

Answer 1

[Alex Taylor]

[1] Reddy, B. S. and Chatterji, B. N., An FFT-Based Technique for Translation, Rotation, and Scale-Invariant Image Registration, IEEE Transactions on Image Processing, Vol. 5, No. 8, August 1996

Reading this paper is the best way to answer your questions.

Answer 2

[Sean de Wolski]

doc imregcorr

Answer 3

[Kamil Tkacz]

I have no access to this link :(

[Sean de Wolski]

Run the command in MATLAB:

>>doc imregcorr

Answer 4

[Kamil Tkacz]

Yea but this is goes automatically. I rather wanna to understand why does it happend. I know that i should calculate FFT from eg lena.png and rotated, scalling lena2.png. But what it comes next?