This paper analyzes B-spline interpolation techniques of degree 2, 4, and 5
with respect to ah criteria that have been applied to evaluate various int
erpolation schemes in a recently published survey on image interpolation in
medical imaging (Lehmann ct at, 1999), It is shown that high-degree B-spli
ne interpolation has superior Fourier properties, smallest interpolation er
ror, and reasonable computing times. Therefore, high-degree B-splines are p
referable interpolators for numerous applications in medical image processi
ng, particularly if high precision is required. If no aliasing occurs, this
result neither depends on the geometric transform applied for the tests no
r the actual content of images.