squeezevol(1)                                                    squeezevol(1)



NAME
       squeezevol - Reduce or expand a volume in all dimensions by interpola-
       tion.

SYNOPSIS
       squeezevol  [options]  input_file  output_file

DESCRIPTION
       Squeezevol provides a command-line interface to the program
       Matchvol, for reducing (or expanding) an image volume in size in all
       dimensions by 3-D interpolation.  There are options for specifying the
       overall scaling factor, independent scaling factors for each dimension,
       and the extent of the input volume to be scaled.  The size of the out-
       put volume is automatically set to the appropriate size to contain the
       scaled input volume.  There is a default global scaling factor, which
       can be changed with either -f or -e The factors are referred to as
       "squeezing" factors because the volume is actually scaled by the
       inverse of each factor.  When you enter and expansion factor instead,
       the volume is expanded by that factor.

       Pixel size and origin values in the header of the output file are set
       so that the coordinate system matches that of the input file.  Thus,
       models drawn on the input file in 3dmod should load correctly onto the
       output file, and vice versa.

OPTIONS
       Squeezevol uses the PIP package for input (see the manual page for
       pip).  Options can be specified either as command line arguments
       (with the -) or one per line in a command file (without the -).
       Options can be abbreviated to unique letters; the currently valid
       abbreviations for short names are shown in parentheses.

       -f OR -factor   Floating point
              Global factor to squeeze by, default = 1.6

       -e OR -expand   Floating point
              global expansion factor

       -x OR -xFactor       Floating point
              Factor to squeeze in X dimension, default is global factor or
              1/expansion

       -y OR -yFactor       Floating point
              Factor to squeeze in Y dimension, default is global factor or
              1/expansion

       -z OR -zFactor       Floating point
              Factor to squeeze in Z dimension, default is global factor or
              1/expansion

       -ix OR -ixSize       Integer
              Input size in X dimension, default is full X size of volume

       -iy OR -iySize       Integer
              input size in Y dimension, default is full Y size of volume

       -iz OR -izSize       Integer
              input size in Z dimension, default is full Z size of volume

       -t OR -tempdir       File name
              Directory to use for temporary files

       -l OR -linear
              Use linear interpolation; default is quadratic

       -PID   Print process ID

       -StandardInput
              Read parameter entries from standard input


FILES
       If the output file already exists a backup image of the original is
       created with the ~ extension.

AUTHOR
       David Mastronarde  <mast at colorado dot edu>

SEE ALSO
       matchvol



BL3DEMC                              4.7.3                       squeezevol(1)