Triton Isis - Manual (Page 131)

June 2004 Isis® Sonar User's Manual, Volume1
117
Table 7-1. Options in the Select Color Palette dialog box
Side-Scan Colors Select one of the five gradational side-scan LUTs. The Gray Scale
LUT has 236 levels and the others have 16 levels.
Seismic Colors As an alternative to the side-scan LUTs, select one of the 16-level
high-contrast Seismic LUTs.
Squelch This slide bar allows removal of background noise in the displayed
image by coloring a progressively greater percentage of the lower
value pixels with the lowest level of the color LUT as the slide bar is
moved to the right. The small button to the left of the slide bar turns
the squelch off.
Reverse Palette Inverts the order of the colors in the selected LUT by clicking in the
box to invoke this option.
Strong Returns Red Replaces the LUT’s high-intensity color with red to highlight the
strongest returns. Click in the box to invoke this option.
The color palette is displayed to the right of the menu items on the menu bar.
The Select Color Palette dialog box can also be displayed by clicking on the color
palette itself.
Figure 7-3: The color palette gradient
To the left and right of the displayed color palette are arrow buttons. These
buttons allow rotation of the color LUT displayed on the palette. The keyboard
right and left arrow keys have the same function as these buttons. The arrow
keys can also be held down for continuous LUT rotation. A rotated LUT can be
returned to its original configuration by clicking once on the palette. A second
click will open the Select Color Palette dialog box.
Chapter 7: Using the Color Menu