8
Annotation and Analysis Tools
In addition to viewing data, SceneVision-3D provides tools for drawing, measuring, annotating,
and analyzing 2D and 3D data. These tools generally do not change the data in any way – the
resulting annotations become a part of the scene file only (there are some exceptions to this and
they are noted). Multiple scene files, with different illustrations and analyses, can be created
with the same data files.
Note: For tools in SceneVision, the general convention is to first select the tool,
either from a menu or the toolbar. Then, to execute the function (e.g. to select,
draw, measure) you
hold down Ctrl and click with the left mouse button
. If
you are not holding down
Ctrl
, the mouse functions as your navigation tool for
moving the data or viewpoint as described in the previous sections.
As in the last section, you may want to have the clue scene loaded to try the functions that
follow.
8.1
Draw & Measure Tools
SceneVision provides several tools for measuring real-world distances on 2D and 3D data, and
for drawing points, lines, and planes.
Note: The following functions will work in range, model, and aligned image
data. Try using the model data (clue.wrl) for the next few functions.
8.1.1
Landmark Points
Landmark points highlight a particular location in data. First select
Create Landmark Point
from
the Draw & Measure menu, or select its button (
) in the Main toolbar. Move the cursor to a
point in the data, hold down
Ctrl
and
left-click
. A point will be drawn on the data, along with a
default, unique label. That same label will appear in the scene tree in the Landmark Points
folder. A dialog box also will appear as in Figure 38.
Note: You can only select points with valid data – you cannot select points from
background regions or points with invalid range values.
You have several options for annotating and labeling landmark points (and these are similar for
other annotations). The program will provide a unique, default label (in this case
clue_point_01
)
which you can change. The label appears next to the point in the data as shown (in yellow). You
can hide the label by clicking on the
Show Label
box to remove the check mark.
You can add a description – which can be longer than the label – and it also can be displayed or
hidden. Note that unlike the label you can move the description in the data window and it will
be connected to the point by a dotted line. (Selecting and moving annotations are described in
the next section.) The dialog box also has a Properties section that shows the type of annotation,
its location, and its size where appropriate and a check box for showing or hiding the
annotation. This is handy for removing clutter from a scene without actually deleting any
annotations.
DeltaSphere-3000 3D Scene Digitizer
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