
Editimage(Display Utils)     Khoros      Editimage(Display Utils)

     DISPLAY UTILITIES

     Through the "Display Utilities" pull-down menu, five of
     Editimage's subforms can be accessed, as well as two immedi-
     ate 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 thres-
     holding 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.

     1) Zooming In On Image

          The first subform, Zoom, allows you to zoom in on por-
          tions of the displayed image.

     2) Print Pixel Values

          The second subform, Print Pixels, prints pixel values
          of the currently displayed image.

     3) Interactive LUT

          The third subform, Interactive LUT, brings up the sub-
          form which allows you to use the interactive look up
          table to change the colormap of the currently displayed
          image.

     4) Psuedocoloring

          The fourth subform, PseudoColor, lets you interactively
          pseudocolor an image.

     5) Pixel Windowing / Pixel Thresholding

          The fifth subform, Window/Threshold, allows you to
          threshold an image.

     CHANGE BANDS

          The CHANGE BANDS option of the "Display Utilities"
          pull-down menu allows you to immediately change the
          band that is currently displayed.  When you select the
          CHANGE BAND 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 editimage 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 editimage 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.

     OVERLAY IMAGE(S) The OVERLAY IMAGE(S)

          The OVERLAY IMAGE(S) 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.

          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.

          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 Input/Output
          pane, accessible via the "Image Utilities" pulldown
          menu.

     COMBINE OVERLAY(S)

          If any overlays have been put onto the image using the
          OVERLAY IMAGE(S) option (see above) or using the OVER-
          LAY selection of the  Input/Output 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 com-
          bined, may be written out using the Input/Output sub-
          form. Note that if an image with overlays is output
          without using the COMBINE OVERLAY(S) button, the over-
          lays will be not be written out!

          Colorspace Models

          The zooming, pixel print, interactive look up table,
          pseudocoloring, and thresholding operations offered by
          editimage 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
          editimage can be intelligently used.  These are the
          colorspace models that are available:

          RGB (Red, Green, Blue)
          CMY (Cyan, Magenta, Yellow)
          HSV (Hue, Saturation, Value)
          HLS (Hue, Lightness, Saturation)
          YIQ (Illuminance, Chrominances)
          CIE XYZ
          CIE UVW
          GREY

     Copyright 1991, University of New Mexico. All rights
     reserved.

Khoros                    Release: 1.0                          1

