OP-BW(1)

NAME
op-bw - read an image from the Optronics Scanner

SYNOPSIS
op-bw [-hv] [-S step] [-x xoffset] [-y yoffset] [-s squaresize] [-w width] [-n height] > file.bw

DESCRIPTION
Op-bw will read an image from an Optronics Scanner and save it in a bw(5) format file.

By default, the output bw file will be 512x512 pixels. Specifying the -h flag changes the default to 1024x1024. The -s flag will set both the file height and width to be the given size, while -w and -n sets them individually.

The "width" or x axis runs around the drum of the scanner, and the height or y axis runs along the length of the drum. The region saved from the scanner can be offset in x and y by some number of pixels by using the -x and -y flags.

The pixel size is set by the iris wheel on the Optronics. The x spacing (around the drum) is set by the dial on the front pannel. The y spacing is controlled by the step count, which is in multiples of 12.5 microns. A step count of 4 (or 50 microns) is the default. This y spacing can be changed via the -S flag. Your choices of resolution in microns, along with the corresponding step count and resolution in "dots per inch" are as follows:

Microns  Step    Dpi
 12.5     1     2032
 25       2     1016
 50       4      508
100       8      254
200      16      127
400      32       63.5

SEE ALSO
brlcad(1), bw-fb(1), bw(5)

AUTHORS
Phillip Dykstra
Charles M. Kennedy
Douglas Kingston

SOURCE
SECAD/VLD Computing Consortium, Bldg 394
The U. S. Army Ballistic Research Laboratory
Aberdeen Proving Ground, Maryland 21005

BUG REPORTS
Reports of bugs or problems should be submitted via electronic mail to <devs@brlcad.org>.