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Multisegment NITF Images

Using Multisegment NITF Files as Input

To be valid, the image segments comprising an incoming NITF file must be mosaickable. They must have compatible resolutions, colorspaces, and datatypes, and must all fall on the same coordinate space.

To view the image segments in a multisegment NITF image, right-click on the job in the Job List and select NITF Image Segments. The segments can be removed from the output image by clearing the check boxes beside each image segment.

If no segments are selected, the input image is considered invalid.

When the image is encoded, the selected segments are mosaicked into a single flat image.

NITF mosaic tiles behave the same way as other image tiles in the encoding process; the selected segments of each tile are mosaicked together first, and then the tiles are mosaicked together for the final output.

Using a NITF Image Segment as a Component Band in a Color Composite Image

To use a multisegment NITF file as a component band in a color composite image:

  1. Click the File menu and select Add color composite image to encode.

    The Add Color Composite Image dialog box appears.

  2. Select RGB or Multispectral from the Color Space drop-down list at upper right.

  3. Select a band and click Edit File Name….

    The Edit File Name dialog box appears.

  4. Enter a file name or click Browse… to locate the file, then click OK. If the file you selected is a multiple image segment NITF file, a third dialog box (the Image Segment Selector dialog box) appears.

  5. Select which 1-banded image segment of the selected NITF file you wish to use as the “active segment” for the selected band, then click OK.

Changing the Active Segment in a Color Composite Image

You can change the active segment in a color composite image at any time.

To change the active segment:

  1. Click the File menu and select Add color composite image to encode.

    The Add Color Composite Image dialog box appears.

  2. Click Select Image Segment....

    The Image Segment Selector dialog box appears.

  3. Select a different 1-banded image segment from the drop-down list and click OK.

Creating Multisegment NITF Files

To create a NITF file with multiple image segments, the individual segments must be mosaickable. This is because they must be placed on a common grid. All of the mosaicking rules for other kinds of images apply to multisegment NITF images. For more information on mosaics, Mosaics.

To create a multisegment NITF file:

  1. Click the Create New Mosaic button on the toolbar.

    The Create New Mosaic dialog box appears.

  2. Select NITF as the output format.
  3. Select the Create multiple image segments radio button.

NOTE: Multisegment NITF encoding supports up to 999 image segments. If you attempt to encode more than 999 tiles as a multisegment NITF file, an error message informs you that you have exceeded the maximum number of image segments and asks whether or not you would like to flatten the input tiles first. Clicking “Yes” will result in a single image segment NITF file. This is equivalent to clearing the “Create multiple image segments” check box. Clicking “No” simply cancels the addition of that tile.