Oceanic SAMM, Руководство пользователя

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SAMM User Manual
69
7.6 Imagery Processing Tutorials
Trimming Tutorial
This example shows how to apply the trimming filters. The observable effect of each function
conveys more information than words, so make sure you are comfortable with how the default
view looks before proceeding. If SAMM is not already playing data, as before, launch SAMM,
create a new project, and add data from the demo_data folder in playback mode (the example
uses the files data.1385510330801_37_ds.msk and data.1385510330801_39_ds.msk and
press “Play”.
1. In the Processing controls panel, drag the Arc slider bars individually to 20 and 80, or
input these values.

The green sector outlines in the Forward Look and mosaic window narrow to 60%
of its range, losing 20% of the arc length from each edge.

The swath width narrows by the same factor as SAMM draws it behind the vessel
in the mosaic window.
2. Return the arc slider bars to 0 and 100.

The sector outline and swath width return to full coverage.
3. In the Processing controls panel, Drag the right Rng (range) slider bar to 60.

The sector outline shrinks to 60% of its full coverage in the Forward Look and
mosaic windows.

The swath coverage shrinks correspondingly as SAMM draws it in the mosaic
window.
4. Drag the left Rng slider bar to 30.

The sector outline retreats to 30% of its coverage from the center of the circle, and
the swath coverage responds.
Rendering Tutorial
This tutorial walks you through changing some of the rendering options available in SAMM. The
rendering options include changing the colormap, and the contrast, opacity, and feathering
values.
1. Click the Configuration icon in the toolbar.
2. In the Swath colormap panel in the Display tab, select Reverse Gray from the Mosaic in
progress dropdown menu .

The mosaic in progress swath changes to a greyscale where objects are light and object
shadows are dark.
3. Change it back to Goldenrod and click Close.
4. In the Processing controls on the sidebar, drag the Brightness slider bar to the left and
right.

Watch the intensity of the PPI and mosaic change for the entire wath currently being
mosaicked(Figure 62).
5. Drag the Gamma slider bar to the left and right.

Changing the gamma value enhances light or dark tones(Figure 62).