unu-dist - Man Page

unu dist -th,--thresh <val> [-b,--bias <val>] [-t,--type <type>] [-sgn] [-inv] [-i,--input <nin>] [-o,--output <nout>]

Euclidean distance transform. Based on “Distance Transforms of Sampled Functions” by Pedro F. Felzenszwalb and Daniel P. Huttenlocher, Cornell Computing and Information Science TR2004-1963. This function first thresholds at the specified value and then does the distance transform of the resulting binary image. The signed distance (negative values inside object) is also available. Distances between non-isotropic samples are handled correctly.

• Uses nrrdDistanceL2 or nrrdDistanceL2Signed

-th <val> , --thresh <val>

threshold value to separate inside from outside (double)

-b <val> , --bias <val>

if non-zero, bias the distance transform by this amount times the difference in value from the threshold (double); default: “0.0”

-t <type> , --type <type>

type to save output in; default: “float”

-sgn

also compute signed (negative) distances inside objects, instead of leaving them as zero

-inv

values below threshold are considered interior to object. By default (not using this option), values above threshold are considered interior.

-i <nin> , --input <nin>

input nrrd

-o <nout> , --output <nout>

output nrrd (string); default: “-”

unu(1)

unu(1).