Image Registration

Image registration is the process of precisely overlaying two (or more) images of the same area through geometrically aligning common features (or control points) identified in the images. The images can be taken at different times, from different viewpoints, and/or by different sensors. The registered images can be used for different purposes, such as change detection if the images are taken at different times, digital elevation model generation or shape reconstruction when the images are collected from different viewpoints, information integration when the images are taken by different sensors, and image mosaicking when the images have overlapping areas.

Figure 1 shows an example of image mosaicking, where the features 1, 2, 3, 4, 5, 6 and 1', 2', 3', 4', 5', 6’ are the common control ...