convolution-based shape identification — segmentShapeFromImage • ANTsR

takes an image and a shape and relates the 2nd with the first to yield a feature image - the function is user modifiable but defaults to cor

segmentShapeFromImage(
  img,
  shape,
  mask = NULL,
  rad = NA,
  scfun,
  maskZeroes = TRUE
)

Arguments

img	antsImage
shape	to define features
mask	with values 1 or 0
rad	max radius ( optional, not recommended )
scfun	function to apply to create feature image (defaults to cor)
maskZeroes	if TRUE (default), zeroes will not influence the result

Value

feature image

Author

Brian B. Avants

Examples


set.seed(123)
fi<-makeImage(c(20,20),rnorm(400,mean=1,sd=0.1))
mask<-getMask(fi,0.8,Inf,0)
segs<-kmeansSegmentation( fi ,3 , mask)$segmentation
segs[ segs != 1 ]<-0
shp<-labelClusters( segs,1)
shp[ shp != 1 ]<-0
fimg<-segmentShapeFromImage(fi,shp,mask)
#> Warning: the standard deviation is zero