tps2d: Thin Plate Splines for 2D data
Description
tps2d is the core function for Thin Plate Splines. It is used internally for
all TPS graphical functions.tps_apply is the very same function but with
arguments properly named (I maintain tps2d as it is for historical reasons) when
we want a apply a trasnformation grid.
Usage
tps2d(grid0, fr, to)
tps_apply(fr, to, new)
Arguments
grid0
a matrix of coordinates on which to calculate deformations
fr
the reference $(x; y)$ coordinates
to
the target $(x; y)$ coordinates
new
the target coordinates (again)
Value
a matrix of (x; y) coordinates with TPS-interpolated
deformations