This Validation section provides input data, processing and
visualization
examples for the Vector Kernel PCA for Meshes code to ensure correctness of
the resultant data. These examples
are useful tests when the program is run on new environments or platforms.
Examples are displayed with available visualization software (CAWorks).
A sample VectorKernelPCA command is posted with the example.
The input data sets are momentum measurements produced by lddmm matching of
each subject in the population against the population's template caudate
surface. The momenta quantify the shape difference between the subjects in the
population.
The example calculates the first 20 principal components of the momenta.
The first principal component captures the areas of greatest shape
difference over the population.
The program produces 20 vtk PolyData files (meshes) that have the principal
component values at each vertex stored as PointData.
The following figures show the program output as displayed in CAWorks.