scan_warp

purpose
usage
examples
comments
error messages
see also

Purpose:

Displays information stored in a .warp file

Usage:

scan_warp .warp-file

where the following definitions apply:

.warp-file: name of the .warp file

Examples:

scan_warp atlas10.warpself

standard file: atlas10
identifier: 0024248492
file dimensions: 138 by 170 by 143 pixels (x,y,z)
voxel dimensions: 1.000000e+00 by 1.000000e+00 by 1.750000e+00 (x,y,z)

reslice file: atlas10
identifier: 0024248492
file dimensions: 138 by 170 by 143 pixels (x,y,z)
voxel dimensions: 1.000000e+00 by 1.000000e+00 by 1.750000e+00 (x,y,z)

Equations refer to voxel coordinates
x,y, and z are coordinates in standard file
x',y', and z' are coordinates in reslice file
        x'=             y'=             z'=
        0.000000e+00    0.000000e+00    0.000000e+00
+       1.000000e+00    0.000000e+00    0.000000e+00    x
+       0.000000e+00    1.000000e+00    0.000000e+00    y
+       0.000000e+00    0.000000e+00    1.000000e+00    z

Comment: align_warp t=(7000 7000) sf=(81 9 3) prec=0.5000 its=50 2 model=1 1 1

The file atlas10.warpself was generated by warping the file atlas10 to itself with a first order polynomial. The reslice and standard files are displayed analogously to scanair. The first order warp is represented by the coefficients used to compute each output coordinate arrayed vertically. The input coordinates which refer to the standard file are multiplied by the coeffients that appear on the same horizontal row.

Comments:

Note that these coordinates are voxel based coordinates in the internal coordinate system used by the AIR package and may not correspond in a straightforward way to coordinates generated by your image display package.
Polynomial terms up to twelfth order will be listed, but the program will not list high order terms if all terms of that order are zero. If you ran a fifth order registration, you might only see terms up through second order if the registration program failed to find any improvement in the cost function as a result of modifying the higher order terms.
If your voxels are not cubic and you need a real world (as opposed to voxel coordinate) version of the transformation, you will need to use manualreslice or zoomer to create .air files for interpolating your reslice and standard files to cubic voxels and then use combine_warp to create a new .warp file that would register cubic versions of the files. The resulting .warp file can then be displayed by this program.

scan_warp

Purpose:

Usage:

Examples:

Comments:

Error messages: (alphabetical by case)

See also: