imagesToMatrix.Rd
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)
imageList | A character vector containing a list of image files to read, in order. |
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mask | An |
A matrix containing the masked data, the result of calling
as.numeric(image, mask)
on each input image.
# 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