
venhpatch(1)                 Khoros                  venhpatch(1)

PROGRAM
     venhpatch - Equalize or stretch image contrast based on
     local histogram information.

SYNTAX
     venhpatch

     -i             input image

     -o             resulting output image

     -w             specifies local width of region

     -h             specifies local height of region

     [-t]           Choose Stretch [False] or Equalize [True]

     [-V]           Gives the version for venhpatch

     [-U]           Gives the usage for venhpatch

     [-P]           Prompts for command line options

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

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

DESCRIPTION
     venhpatch stretches the contrast of an image based on local
     histogram information.  The result is a patch work of dif-
     ferently enhanced subimages.  The -t option allows the user
     to select equalization or stretch within each local region.

REQUIRED ARGUMENTS
     -i     type: infile
            desc: input image

     -o     type: outfile
            desc: resulting output image

     -w     type: integer
            desc: specifies local width of region

     -h     type: integer
            desc: specifies local height of region

OPTIONAL ARGUMENTS
     -t     type: boolean
            desc: Choose Stretch [False] or Equalize [True]
            default: true

EXAMPLES
     venhpatch -i input.image -o output.image -w 25 -h 25 -t 1

     This command patch-wise enhances input.image and stores the
     result in output.image.  The size of the patches is 25 by
     25, and the type of enhancement is equalization.

SEE ALSO
     intro(1), verror(3), vgparms(3), vutils(3) vheq(1), vhstr(1)

RESTRICTIONS
     venhpatch will work very poorly if the region size is
     smaller than the default values.  The data storage type of
     the input image should be BYTE.

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

Khoros                    Release: 1.0                          1

