Triton Perspective - Manual (Page 130)

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The difference DTM created from this process will automatically load into the project and
can be found in the Imagery/Bathymetry file tree layer.
Shown below is an example of the area selected for A-B calculation. The top image shows
they are selected and the selection bounding box is in light blue. The lower image shows the
difference between the top layer which is visible and the layer beneath collected on a
previous day:
Shown in the image above in red are the only differences identified between 0.3 and 3.0
meters in the area selected as defined by the dashed blue line in the upper image. Please note
that this requires good co-registration between layers and very good motion compensation to
limit noise artifacts from appearing in the difference calculation.