Image registration refers to an image processing task where the objective is to align a target image with a source image. In more general terms, it aims to compute the spatial transform (function) that maps (some) points from one image to the corresponding points in the other image. Often, finding a transformation from one image to another is referred to as alignment and then actually performing the image warping procedure using the estimated transform is called registration. There are three general philosophies to compare to determine alignment:
- Intensity-based (compare actual pixel values from one image to another, for example, with mutual information)
- Segmentation-based (register the binary segmentation)
- Landmark (or feature)-based (mark key points in both images and derive a transform that makes every pair of landmarks match)
The transformations that...
