## Name

bwhist — display a histogram of a black and white bw file on a framebuffer

## Synopsis

`bwhist` [-v ] [`file.bw`]

## DESCRIPTION

Bwhist displays a histogram of the pixel values in a bw(5) format file. If a file is not given, standard input is read. The output will be displayed on the frambuffer selected via the `FB_FILE` environment variable (see libfb(3)).

The relative frequency is displayed on the x axis scaled so that the maximum is full screen. The value 0 is at the bottom of the screen, 255 is at the top. The output is overlaid on whatever is currently on the display.

The `-v` flag will output the histogram values on the terminal.

## SEE ALSO

brlcad(1), bwhisteq(1), bwstat(1), bw(5)

## BUGS

This program assumes it has at least 512 lines in y to work with.

## AUTHOR

BRL-CAD Team

## COPYRIGHT

This software is Copyright (c) 1989-2013 by the United States Government as represented by U.S. Army Research Laboratory.

## BUG REPORTS

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