 <B>-cluster4</B> | <B>-c4</B>
| <B>-cluster8</B> | <B>-c8</B>]

[<B>-value</B> <I>val</I>]

[<B>-clump</B> <I>size</I>]

[<I>pamfile</I>]

<A NAME="lbAD">&nbsp;</A>
<H2>DESCRIPTION</H2>

<p>This program is part of <a href="index.html">Netpbm</a>.

<P><B>pamditherbw</b> dithers a grayscale image.  Dithering means turning
each shade of gray into a pattern of black and white pixels that, from
a distance, look the same as the gray.

<p>The input should be a PGM image or a PAM image of tuple type
GRAYSCALE.  Ho