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<head><title>if1</title></head>
<BODY BGCOLOR=#FFFFFF>
<A NAME="if1"></A><CENTER>
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<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>
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