Get index from spatial point of an 'antsImage'.

antsTransformPhysicalPointToIndex(x, point)

Arguments

x

Image object of S4 class 'antsImage' to get values from.

point

image physical point

Value

array of pixel values

Examples

img<-makeImage(c(10,10),rnorm(100)) pt<-antsTransformPhysicalPointToIndex(img,c(2,2)) arr = as.array(img) testthat::expect_error( antsTransformPhysicalPointToIndex(arr,c(2,2)), "antsImage") testthat::expect_error( antsTransformPhysicalPointToIndex(img,c("2",2)), "point must be") testthat::expect_error( antsTransformPhysicalPointToIndex(img,c(2,2,2)), "matrix must be of")