Image warping

Warping may be used for correcting image distortion as well as for creative purposes (e.g., morphing[1]).

Some methods are: The most obvious approach to transforming a digital image is the forward mapping.

This applies the transform directly to the source image, typically generating unevenly-spaced points that will then be interpolated to generate the required regularly-spaced pixels.

This applies the inverse transform to the target pixels to find the unevenly-spaced locations in the source image that contribute to them.

To work out what kind of warping has taken place between consecutive images, one can use optical flow estimation techniques.

Image warping example