mask_img: Mask Image

View source: R/mask_img.R

mask_imgR Documentation

Mask Image

Description

Takes an image, masks it by mask, and returns an object of class nifti

Usage

mask_img(img, mask, allow.NA = TRUE)

Arguments

img

object of class nifti

mask

array or object of class nifti, same dimensions as img

allow.NA

allow NAs in the mask

Value

Object of class nifti with values outside mask set to 0 if mask is 0 and NA if mask is NA and img if mask == 1

Examples

  set.seed(5)
  dims = rep(10, 3)
  arr = array(rnorm(prod(dims)), dim = dims)
  nim = oro.nifti::nifti(arr)
  mask = abs(nim) > 1
  masked = mask_img(nim, mask)
  mask[mask == 0] = NA
  na_masked = mask_img(nim, mask, allow.NA = TRUE)
  
set.seed(5)
dims = rep(10, 3)
arr = array(rnorm(prod(dims)), dim = dims)
arr[,,10] = 0
nim = oro.nifti::nifti(arr)
rnifti = RNifti::asNifti(nim)
mask = nim > 0
timg = tempimg(nim)
limg = list(factor(timg), factor(timg))
func = function(...) mask_img(..., mask = mask)
func(arr)
func(nim)
func(rnifti)
func(timg)
lapply(limg, func)

neurobase documentation built on May 29, 2024, 2:17 a.m.