Non-affine transformation

Can someone please tell me now to make a non-affine transformation of an image in matlab ?

Answer 1

[Matt J]

Using imwarp and projective2d you can also do projective transformations.

[Sahithya S Iyer]

Projective transformations are invertible - application of inverse of the geometric transformation leads to the original point. This does not classify as an non-affine transformation.

[Matt J]

Not sure where your terminology is coming from, then. Affine transformations are not defined by invertibility. They are defined as having the form

y=A*x+b

[Sahithya S Iyer]

Please correct me if I am understanding wrong - All non-affine transformations irreversible (non-invertible) ?

[Matt J]

Nope. I don't know where you got that. An affine image transform is one that maps lines to lines in general and parallel lines to parallel lines in particular,

https://en.wikipedia.org/wiki/Affine_transformation