</DD>
</DL>
<BR>
<BR>

<A NAME="39571"></A>
<B>:optimum-threshold</B> [method]

<DL COMPACT>
<DT> 
<DD> 
returns levels that is maximum of this image's brightness-distribution.
</DD>
</DL>
<BR>
<BR>

<A NAME="39581"></A>
<B>:project-x</B> [method]

<DL COMPACT>
<DT> 
<DD> adds all pixel values of the same x coordinate
and returns a vector of these values.
</DD>
</DL>
<BR>
<BR>

<A NAME="39591"></A>
<B>:project-y</B> [method]

<DL COMPACT>
<DT> 
<DD> adds all pixel values of the same y coordinate
and returns