how to artificially deform an image

i have a dataset of mri images and want to deform them for registration process

Answer 1

[Image Analyst]

How about using imregister() or imtransform()?

http://www.mathworks.com/help/releases/R2012a/toolbox/images/ref/imregister.html

http://blogs.mathworks.com/steve/2006/08/04/spatial-transformations-defining-and-applying-custom-transforms/