ated edge pixel (=2),
or an isolated pixel (=255).
</DD>
</DL>
<BR>
<BR>

<P>

<A NAME="39916"></A>
<B>overlay-edge</B> <EM>ximg edgeimg </EM>[function]

<DL COMPACT>
<DT> 
<DD> 
displays <EM>edgeimg</EM> obtained by <B>edge1</B> on top of
x-display-able pixel image <EM>ximg</EM>.
Strong edge pixels are colored in red, weak pixels in green, and
isolated pixels in blue.
</DD>
</DL>
<BR>
<BR>

<P>

<A NAME="39929"></A>
<PRE><TT>
<B>edge2</B> <I>img1 edge1result &amp;key (kvalue 8.0) [function]
<BR>(curve-thre