Mapping the Problem Space of Image Registration

In this paper we explore a conceptual mapping of the image registration problem into an N-Dimensional problem space based on the properties of the images being registered, in contrast to traditional surveys of image registration which divide the field algorithmically. The five main dimensions of our proposed mapping are variations in: spatial alignment, intensity, focus, sensor type, and structure. Individual algorithms can be thought of as supporting a volume of solutions within the problem domain map, although they are typically designed to solve problems along a single dimension. Existing image registration papers and techniques are taxonomized within this mapping according to these major dimensions. The focus of this paper is threefold. First, an up-to-date survey of image registration techniques is provided, building from previous seminal surveys. Second, a novel taxonomy is presented that organizes the registration problem space based on the variation between the images being registered. Finally, a number of new research areas made possible under this novel taxonomy are examined, and a path is laid out for future research in the field.