Biomedical Engineering Reference
In-Depth Information
The initial two surfaces
1- Initial alignment
2- Find correspondence between
closest points
3- Calculate an incremental motion
4- Iterate until some convergence criterion
is satisfied
Figure 1.1: A diagram illustrating the distance-based registration algorithm
steps which start by an initial alignment and then finding correspondence from
which incremental motion is calculated and this process iterates until conver-
gence.
Attempts at solving these problems have led to several variants of the original
algorithm. In what follows, we provide a review of these improvements. Another
good review can be found in [5].
1.4.1
Improving Correspondence
The first improvement to the basic algorithm changes the simple point-to-point
correspondence used in many of the methods [4, 6, 7, 8, 9] to that between a
point and a location on the
surface
represented by the other data set. This poten-
tially increases the integration accuracy beyond that of the sampling resolution.
