Triton Isis - Manual (Page 198)

June 2004 Isis® Sonar User's Manual, Volume1 184
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9.7.1 Applying Standard Filters
Standard kernel sizes of 3X3 and 5X5 are available for either spatial filter
mode (Sweep image or Run continuously).
To create a non-standard 3X3 or 5X5 kernel, refer to 9.7.2, ‘Creating and
Applying Custom Filters’.
To apply a standard filter to your imagery
1. Play back the imagery to which you wish to apply a spatial filter.
2. From the Tools menu, choose Spatial Filter.
3. Choose
either Sweep image or Run continuously as your filter mode.
4. Choose either a 3X3 or 5X5 kernel.
5. Choose any filter type except Custom.
The system applies the filter to your imagery.
Note: If you are applying a sweep filter, you can reapply the sweep
filter with or without restoring the original image in your waterfall window. If
you do not restore the image before reapplying the sweep filter, the filter’s
effect is cumulative: each time you apply a filter, the current filter effect is
added to the previous filter effect.
9.7.2 Creating and Applying Custom Filters
Unlike standard filters, which cannot be modified and do not exist as
separate files on disk, custom filters can be created as ASCII files apart
from the Isis software and can be modified to suit your needs. Custom filters
Chapter 9: Using the Tools Menu