Read images into rows of a matrix, given a mask - much faster for large datasets as it is based on C++ implementations.

imagesToMatrix(imageList, mask)

Arguments

imageList

A character vector containing a list of image files to read, in order.

mask

An antsImage containing a binary mask, voxels in the mask are placed in the matrix.

Value

A matrix containing the masked data, the result of calling as.numeric(image, mask) on each input image.

See also

Examples

# make some simulated images and convert them to a matrix n <- 2 tdir<-tempdir() for ( i in 1:n ) { simimg<-as.antsImage( replicate(64, rnorm(64) ) ) antsImageWrite( simimg, tempfile(fileext='.mha')) } imageList = list.files(tdir, pattern = ".mha", full.names = TRUE) mask = getMask( antsImageRead( imageList[1] ) ) mat = imagesToMatrix(imageList, mask) print(dim(mat))
#> [1] 3 18017