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<H3><A NAME="SECTION00843100000000000000">
SKY/ROMAFOT</A>
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<TT>SKY/ROMAFOT</TT>
<FONT SIZE="-1"><TT>frame [sky_tab] [area] [nrx,nry]</TT></FONT>
<P>
This command divides the frame into <I>N</I> smaller rectangular areas,
with
<!-- MATH: $N=nrx\times nry$ -->
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WIDTH="106" HEIGHT="41" ALIGN="MIDDLE" BORDER="0"
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ALT="$N=nrx\times nry$">.
It computes the intensity histogram in each
region and determines the sky values of the areas by means of the
mode of the distribution. After having found the sky value of the
individual regions one can do the actual search for objects above a
certain threshold.
<P>
<BR><HR>
<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-15</I>
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