
vblse(1)                     Khoros                      vblse(1)

PROGRAM
     vblse - Perform band-limited surface extrapolation (adaptive
     apodization)

SYNTAX
     vblse

     -i             input image

     -m             valid data mask image

     -p             extrapolation PSF image

     -o             output image

     [-n]           number of iterations

     [-V]           Gives the version for vblse

     [-U]           Gives the usage for vblse

     [-P]           Prompts for command line options

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

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

DESCRIPTION
     vblse

     performs band-limited surface extrapolation or adaptive
     apodization.  Applications are in spectral estimation, image
     reconstruction and image restoration. The method used is the
     classical Gerchberg-Saxton method except that the relaxation
     constraint is allowed to change bandwidth over the course of
     the iterations. In this implementation, the relaxation
     bandwidth is a linear combination of a unity bandpass with
     the passband of a user specified extrapolation pointspread
     function.  The ratio of these two passbands is determined by
     the percentage of the iterations that have been completed:
     intially, the bandwidth is unity, but decreses to exactly
     that specified by the user at the last iteration.

REQUIRED ARGUMENTS
     -i     type: infile
            desc: input image

     -m     type: infile
            desc: valid data mask image

     -p     type: infile
            desc: extrapolation PSF image

     -o     type: outfile
            desc: output image

OPTIONAL ARGUMENTS
     -n     type: integer
            desc: number of iterations
            default: 100
            bounds: value > 0

EXAMPLES
     % vblse -f feath.missing_data.xv -m feath.good_data_mask.xv
     -n 200 -p gaussian_lowpass.xv -o fixed_feath.xv

     fills in missing data from the input image using the gaus-
     sian lowpass relaxation filter.

SEE ALSO
     intro(1), verror(3), vgparms(3), vutils(3), lvblse(3)

RESTRICTIONS
     Works only on FLOAT or images.

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

Khoros                    Release: 1.0                          1

