Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/STR|PARAMETERS">PARAMETERS</a><hr>
<H4>EXPO</H4>
<PRE>
  Valid Values:   0.0 &lt;= x &lt;= 100.0
  Default:        0.5
</PRE>
Specifies a positive real number corresponding to the exponent in
the contrast stretching formula:
<P>
<PRE>
   newval = A*(oldval - ISTR(1))**EXPO + OSTR(1)
</PRE>
where newval and oldval are grey levels, A is the scaling factor,
and ISTR(1) and OSTR(1) are the minimum input and output grey
levels. For instance, if EXPO is set to 1, the stretch is linear.<p>
EXPO defaults to 0.5 (this eliminates the typical skewing of
histograms).
<P>
<PRE>
 EASI&gt;EXPO=n
 EASI&gt;EXPO=             | defaults to 0.5
</PRE>
<hr>
Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/STR|PARAMETERS">PARAMETERS</a><br>
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