vdither(1)

PROGRAM
vdither - Perform dithering using ordered (matrix) technique.

SYNTAX

vdither

-i  input image filename

-o  output image filename

[-t]
    Select Dither Matrix (Star) [True] or (Box) [False]

[-V]
    Gives the version for vdither

[-U]
    Gives the usage for vdither

[-P]
    Prompts for command line options

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

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

DESCRIPTION
vdither performs 5x5 ordered dithers. These dithers provide a reasonable compromise between grey levels and spatial resolution.

The output file is of type BIT, suitable for sending to the laser printer using one of the Khoros printing (hardcopy) routines. The type of dithering matrix used is either (1 for Star or 2 for Box).

1 - Star (default):
    The Star matrix makes superpixels that look like four-pointed stars. The Star dither looks best at close range.

2 - Box:
    The Box matrix makes superpixels that look like boxes.

REQUIRED ARGUMENTS

-i  type: infile
    desc: input image filename

-o  type: outfile
    desc: output image filename

OPTIONAL ARGUMENTS

-t  type: boolean
    desc: Select Dither Matrix (Star) [True] or (Box) [False]
    default: true

EXAMPLES
vdither -i ball.xv -o dith_ball.xv

This will perform the 5x5 ordered matrix dithering on the input image, and store the result in dith_ball.xv. The output image will be of data storage type BIT.

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

RESTRICTIONS
vdither operates only on BYTE data storage type images.

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