1. Image Warping
2. Forward and inverse warping
3. warping using a mesh
4. image morphing
5. Feature-based image morphing
Transformation Lines remain lines
Warping points are mapped to point
A mathematical function for warping from a plane to the plane
Distorted through simulation of optical aberrations
Projected onto a curved or mirrored surface
Consider a S and T image
S has pixel coordinates(u,v)
T has pixel coordinates(x,y)
Forward(x,y)=[X(u,v),Y(u,v)]
Use a sparse set of corresponding points and interpolate with a displacement field
– triangulate the set of points on source
– use the affine model for each triangle
– triangulate target with displaced points
– use inverse mapping
Animations that changes (or morphs) one image or shape into another through a seamless transition
Widely used in movies
Image morphing approaches
Quadrilateral mesh displaced with variational interpolation
Corresponding features/ points
Corresponding orientated line segments (specifies translation, rotation, scaling)
Feature-based morphing
