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<HTML>
<head><title>if1</title></head>

<BODY BGCOLOR=#FFFFFF>
<A NAME="if1"></A><CENTER>
<A HREF="ctsim_contents.html">Contents</A> <A HREF="ctsim92.html#ctsimtext">Up</A> <A HREF="ctsim94.html#ctsimtextlam">&lt;&lt;</A> <A HREF="ctsim96.html#if2">&gt;&gt;</A> </CENTER><HR>

<H2>if1</H2>
Performs math functions on a single image. The commands works with
both real and complex-valued images.<P>
<B>Usage</B><P>

<TT>if1 input-filename output-filename [options...]</TT><P>
<B>Options</B><P>

<TABLE>

  
<TR><TD VALIGN=TOP>
- -<TT>invert</TT>
</FONT></TD>

<TD VALIGN=TOP>
Negate pixel values.
</FONT></TD></TR>

  
<TR><TD VALIGN=TOP>
- -<TT>log</TT>
</FONT></TD>

<TD VALIGN=TOP>
Take natural logrithm of pixel values.
</FONT></TD></TR>

  
<TR><TD VALIGN=TOP>
- -<TT>exp</TT>
</FONT></TD>

<TD VALIGN=TOP>
Take natural exponent of pixel values.
</FONT></TD></TR>

  
<TR><TD VALIGN=TOP>
- -<TT>sqr</TT>
</FONT></TD>

<TD VALIGN=TOP>
Take square of pixel values.
</FONT></TD></TR>

  
<TR><TD VALIGN=TOP>
- -<TT>sqrt</TT>
</FONT></TD>

<TD VALIGN=TOP>
Take square root of pixel values.
</FONT></TD></TR>


</TABLE>
<P>

</FONT></BODY></HTML>