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tend-evecrgb - Man Page

make an RGB volume from an eigenvector and an anisotropy


tend evecrgb -c <evec index> -a <aniso> [-t <thresh>] [-bg <background>] [-gr <gray>] [-gam <gamma>] [-i <nin>] [-o <nout>]


-c <evec index>

which eigenvector will be colored. “0” for the principal, “1” for the middle, “2” for the minor (unsigned int)

-a <aniso>

Which anisotropy to use for modulating the saturation of the colors. All the Westin metrics come in two versions. Currently supported:

  • cl1”, “cl2”: Westin’s linear
  • cp1”, “cp2”: Westin’s planar
  • ca1”, “ca2”: Westin’s linear + planar
  • cs1”, “cs2”: Westin’s spherical
  • ct1”, “ct2”: GK’s anisotropy type (cp/ca)
  • ra”: Basser/Pierpaoli relative anisotropy/sqrt(2)
  • fa”: Basser/Pierpaoli fractional anisotropy
  • vf”: volume fraction = 1-(Basser/Pierpaoli volume ratio)
  • tr”: trace
-t <thresh>

confidence threshold (float) default: “0.5

-bg <background>

gray level to use for voxels whose confidence is zero (double) default: “0

-gr <gray>

the gray level to desaturate towards as anisotropy decreases (while confidence remains 1.0) (double) default: “0

-gam <gamma>

gamma to use on color components (double) default: “1

-i <nin>

input diffusion tensor volume; default: “-

-o <nout>

output image (floating point) (string) default: “-

See Also


Referenced By


April 2021