Convert label image to a matrix — labels2matrix • ANTsR

Convert a labeled image to an n x m binary matrix where n = number of voxels and m = number of labels. Only includes values inside the provided mask while including background ( img == 0 ) for consistency with timeseries2matrix and other image to matrix operations.

labels2matrix(img, mask, targetLabels = NULL, missingVal = NA)

Arguments

img	input label image
mask	defines domain of interest
targetLabels	defines target regions to be returned. if the target label does not exist in the input label image, then the matrix will contain a constant value of missingVal (default NA) in that row.
missingVal	for missing label values.

Value

matrix is output

Examples


fi = antsImageRead(getANTsRData("r16") ,2) %>% resampleImage(c(60,60),1,0)
mask = getMask( fi )
labs = kmeansSegmentation( fi, 3 )$segmentation
labmat = labels2matrix( labs, mask )