xfinverse

xfinverse(1) General Commands Manual xfinverse(1)
NAME
 xfinverse - forms the inverse of a list of transformations
SYNOPSIS
 xfinverse [options] input_file output_file
DESCRIPTION
 Xfinverse will take the inverse of each transformation in a file. The
 only option is whether to set the translations to zero or retain them
 in the output. The latter would give the true inverse, but the former
 has been useful in arcane realignment procedures.
 The transform file can consist of warping transformations instead of
 simple linear transforms. The warping transforms can consist either of
 displacements at sets of control points or displacements on a regular
 grid. The output file has the same form as the input file.
OPTIONS
 Xfinverse uses the PIP package for input (see the manual page for
 pip). Thus, the following options can be specified either as command
 line arguments (with the -) or one per line in a command file (without
 the -):
 -input OR -InputFile File name
 File with transforms to be inverted. If this option is not
 entered, the first non-option argument will be used for this
 input file.
 -output OR -OutputFile File name
 Output file for inverse transforms. If this option is not
 entered, the second non-option argument will be used for the
 output file.
 -zero OR -ZeroShifts
 Set shifts to zero when taking inverse of linear transforms.
 -help OR -usage
 Print help output
 If no command line arguments are entered, the program takes the follow-
 ing inputs sequentially:
 Input file with list of transformations
 Output file for inverse transformations
 0 to set the translations (shifts) to zero, or one to retain them and
 output the true inverse transformation
HISTORY
 Written by David Mastronarde, added to IMOD 4/21/00
 Warping added, June 2011
BUGS
 Email bug reports to mast at colorado dot edu.
IMOD 5.2.0 xfinverse(1)