Usage: 3danisosmooth [options] dataset Smooths a dataset using an anisotropic smoothing technique.
The output dataset is preferentially smoothed to preserve edges.
Options :
-prefix pname = Use ‘pname’ for output dataset prefix name.
-iters nnn = compute nnn iterations (default=10)
-2D = smooth a slice at a time (default)
-3D = smooth through slices. Can not be combined with 2D option
-mask dset = use dset as mask to include/exclude voxels
- -automask = automatically compute mask for dataset
- Can not be combined with -mask
- -viewer = show central axial slice image every iteration.
- Starts aiv program internally.
-nosmooth = do not do intermediate smoothing of gradients
- -sigma1 n.nnn = assign Gaussian smoothing sigma before
- gradient computation for calculation of structure tensor. Default = 0.5
- -sigma2 n.nnn = assign Gaussian smoothing sigma after
- gradient matrix computation for calculation of structure tensor. Default = 1.0
-deltat n.nnn = assign pseudotime step. Default = 0.25
- -savetempdata = save temporary datasets each iteration.
- Dataset prefixes are Gradient, Eigens, phi, Dtensor. Ematrix, Flux and Gmatrix are also stored for the first sub-brick. Where appropriate, the filename is suffixed by .ITER where ITER is the iteration number. Existing datasets will get overwritten.
- -save_temp_with_diff_measures\ : Like -savetempdata, but with
- a dataset named Diff_measures.ITER containing FA, MD, Cl, Cp, and Cs values.
-phiding = use Ding method for computing phi (default)
-phiexp = use exponential method for computing phi
-noneg = set negative voxels to 0
-setneg NEGVAL = set negative voxels to NEGVAL
- -edgefraction n.nnn = adjust the fraction of the anisotropic
- component to be added to the original image. Can vary between 0 and 1. Default =0.5
- -datum type = Coerce the output data to be stored as the given type
- which may be byte, short or float. [default=float]
-matchorig - match datum type and clip min and max to match input data
-help = print this help screen
This program accepts datasets that are modified on input according to the following schemes:
‘r1+orig[3..5]’ {sub-brick selector} ‘r1+orig<100..200>’ {sub-range selector} ‘r1+orig[3..5]<100..200>’ {both selectors} ‘3dcalc( -a r1+orig -b r2+orig -expr 0.5*(a+b) )’ {calculation}
For the gruesome details, see the output of ‘afni -help’.
++ Compile date = Dec 16 2015