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.