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Through the "Display Utilities" pull-down menu, five of Editimage's subforms
can be accessed, as well as two immediate actions.  The subforms deal with 
Zooming, printing pixel values, psuedocoloring an image, using the interactive
lookup table to change the colormap of an image, and thresholding an image.
The three actions buttons found on the "Display Utilities" pull-down menu
allow you to change the band that is currently displayed, to overlay 
images onto the currently displayed image, and to save those overlays as part of
an image to be output.
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1) Zooming In On Image
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The first subform, \fIZoom\fP, allows you to zoom in on portions of the
displayed image.
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2) Print Pixel Values
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The second subform, \fIPrint Pixels\fP, prints pixel values of the currently 
displayed image.
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3) Interactive LUT
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The third subform, \fIInteractive LUT\fP, brings up the subform which allows 
you to use the interactive look up table to change the colormap of the 
currently displayed image.
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4) Psuedocoloring
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The fourth subform, \fIPseudoColor\fP, lets you interactively pseudocolor an 
image.
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5) Pixel Windowing / Pixel Thresholding
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The fifth subform, \fIWindow/Threshold\fP, allows you to threshold an image.
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CHANGE BANDS
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The \fICHANGE BANDS\fP option of the "Display Utilities" pull-down menu allows
you to \fIimmediately\fP change the band that is currently displayed.  When you
select the \fICHANGE BAND\fP option, a list widget will pop up, listing the
bands that are currently available in the VFF file currently being used.
Selecting a band from the list widget will cause \fBeditimage\fP to immediately 
replace the currently displayed band with the new band.  NOTE: THIS OPTION
IS ONLY VALID WITH MULTI-BAND IMAGES!  Also note that the default option of
\fBeditimage\fP is to display the 0th (first) band of the VFF data provided.  
If the VIFF data has only one image, that is considered the 0th band. 
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OVERLAY IMAGE(S)
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The \fIOVERLAY IMAGE(S)\fP option of the "Display Utilities" pull-down menu
allows you to overlay another image on top of the currently displayed image.
The image to be overlaid should be of data type bit.  If the image to be
overlaid is not of type bit, it will be internally converted to type bit, 
without prompting or warning, before it is overlaid.  Note that this 
conversion will not affect the original file in any way. 
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When an image is overlaid, the overlay image is used as an overlay mask; 
the overlay mask is used to indicate which part of the overlay image is 
transferred onto the currently displayed image.  All pixels of the overlay 
mask that have a value of 1 cause the corresponding pixels of the overlay
image to be transferred onto the currently displayed image.  All pixels of the
overlay mask that have a value of 0 indicate that pixels of the currently
displayed image at those locations will appear normally.  
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The image to be overlaid may be specified in two ways.  If the currently 
displayed image has more than one band, clicking on OVERLAY IMAGE(S) will
cause a list widget to come up, from which you may choose which band to use
as the overlay image.  If the currently displayed image has only one band,
you may input a new file to be used as an overlay using the \fIInput/Output\fP
pane, accessible via the "Image Utilities" pulldown menu. 
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COMBINE OVERLAY(S)
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If any overlays have been put onto the image using the OVERLAY IMAGE(S) option
(see above) or using the OVERLAY selection of the  \fIInput/Output\fP subform 
accessible via the "Image Utilities" pulldown menu, this button allows the user 
to actually make the overlays part of the image.  Note that this WILL NOT affect 
the original input image file that is currently displayed;  rather, it is provided 
so that a new image, with overlays combined, may be written out using the 
\fIInput/Output\fP subform. Note that if an 
image with overlays is output \fIwithout using the COMBINE OVERLAY(S) button\fP,
the overlays will be not be written out!
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Colorspace Models 
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The zooming, pixel print, interactive look up table, pseudocoloring, and 
thresholding operations offered by \fBeditimage\fP each work with any of 
8 colorspace
models. It is very important that the user fully understand these colormodels,
as well as the relationship between each of the colormodels, before the full
functionality of \fBeditimage\fP can be intelligently used.  These are the 
colorspace models that are available:
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RGB (Red, Green, Blue)
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CMY (Cyan, Magenta, Yellow)
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HSV (Hue, Saturation, Value)
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HLS (Hue, Lightness, Saturation)
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YIQ (Illuminance, Chrominances)
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CIE XYZ
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CIE UVW
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GREY 
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