Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/IWORKS|LUT+Editing|LUT+Editor">LUT Editor</a><hr>
<H5>Histogram Area</H5>
There are two option menus in this area. The first one, titled ``Showing'',
is used to select which histograms are drawn in the main editing area.
The second option menu, titled ``Computed From'', is used to select a mask 
which will be used to define an area of the image plane from which the 
histogram is computed.<p>
There are two histograms of interest: the original image data histogram, 
with no LUT applied, and the new histogram, with the LUT applied. Using
the ``Showing'' option menu, it is possible to choose which of these 
histograms is drawn in the main editing area. This option does not apply 
to the LUT Editing panel with the ``postage stamp'' LUTs.<p>
Using the ``Compute From'' option menu, the user may select a mask from
under which to compute the raw or (pre-LUT) histogram. Possible selections 
include ``All Data'' for a histogram of the entire image plane, ``Viewed 
Data'' 
for a histogram of the area currently showing in the main image window, or a 
specific graphic plane for a histogram of the imagery underneath that graphic 
plane.  The histograms shown in the LUT graphs are intended as an aid in
setting function end points, and visualizing data distribution.
<P>
<hr>
Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/IWORKS|LUT+Editing|LUT+Editor">LUT Editor</a><br>
<a href="http://www.pcigeomatics.com/dev_corner/pcihlp_gateway.html">About PCI Help Gateway</a>