vgettilt(1)

PROGRAM
vgettilt - computes the best-fit plane parameters for the input VIFF file

SYNTAX

vgettilt

-i  input image

-f  output ASCII file

[-m]
    statistics operation masking image

[-V]
    Gives the version for vgettilt

[-U]
    Gives the usage for vgettilt

[-P]
    Prompts for command line options

[-A [file1]]
    Creates the answer file called vgettilt.ans or file1

[-a [file1]]
    Uses vgettilt.ans or file1 as the answer file

DESCRIPTION
vgettilt computes the least-squares best fit plane for an image. The plane will be given by f(x,y)=Ax+By+C with the tilt coefficients in inverse pixels.

If the maskfile is specified then only those points in the input image with a corresponding nonzero maskfile pixel are used in the computation. The number of points actually contributing to the computation is given with the output data.

The output device or file is specified after the -f option, a filename of # will send the output to stderr.

REQUIRED ARGUMENTS

-i  type: infile
    desc: input image

-f  type: outfile
    desc: output ASCII file

OPTIONAL ARGUMENTS

-m  type: infile
    desc: statistics operation masking image

EXAMPLES
vgettilt -i input -f tilt_info -m mask

SEE ALSO
intro(1), verror(3), vgparms(3), vutils(3), lvgettilt(3) vtilt(1), vdetilt(1)

RESTRICTIONS
vgettilt will not operate on bit or complex data storage types, and will not work on multiband images.

COPYRIGHT
Copyright 1991, University of New Mexico. All rights reserved.