bookstein2d {shapes}R Documentation

Bookstein's baseline registration for 2D data

Description

Carries out Bookstein's baseline registration and calculates a mean shape

Usage

bookstein2d(A,l1=1,l2=2)

Arguments

A a k x 2 x n real array, or k x n complex matrix, where k is the number of landmarks, n is the number of observations
l1 l1: an integer : l1 is sent to (-1/2,0) in the registration
l2 l2: an integer : l2 is sent to (1/2,0) in the registration

Value

A list with components:

k number of landmarks
n sample size
mshape Bookstein mean shape with baseline l1, l2
bshpv the k x n x 2 array of Bookstein shape variables, including the baseline

Author(s)

Ian Dryden

References

Dryden, I.L. and Mardia, K.V. (1998) Statistical Shape Analysis. Wiley, Chichester. Chapter 2.

Bookstein, F. L. (1986) Size and shape spaces for landmark data in two dimensions (with discussion). Statistical Science, 1:181-242.

Examples

     data(gorf.dat)
     data(gorm.dat)

     bookf<-bookstein2d(gorf.dat)
     bookm<-bookstein2d(gorm.dat)

     plotshapes(bookf$mshape,bookm$mshape,joinline=c(1,6,7,8,2,3,4,5,1))

[Package shapes version 1.1-1 Index]