2017

Table Of Contents
Click Refine again to stop the process once an acceptable pixel error value is reached. The pixel error value
is a representation of the distance of the 2D tracks from the computed 3D points.
TIP The refine process is footage-dependant, so your acceptable pixel error value may change depending on what
is tracking. Since the refine process continues until you stop it, as a general rule, if the pixel error value does not
change for a length of time (for example, 30 seconds), you can stop the refine process. The lower the pixel error
value, the more accurate the reconstructed track is.
Fine Tuning Settings
Real World Measures Settings
Define button Enable to define a target length between two points in the image. Select one point, then
press Shift and select the second point. When defining is complete, disable Define. Establishing real world
units is helpful when exporting the point cloud through the 3D camera for use in a 3D application.
Length field Displays the measurement of the length between the two points, in the unit of your choice
(centimeters, inches, etc.). Editable.
Plane Settings
Plane Define button Enable to define the ground plane in the image (when defining is complete, disable
Define).
Plane Scale field Displays the scale of the ground plane. Editable.
X Position field Displays the position of the ground plane on the X axis. Editable.
Y Position field Displays the position of the ground plane on the Y axis. Editable.
Z Position field Displays the position of the ground plane on the Z axis. Editable.
X Rotation field Displays the rotation of the ground plane on the X axis. Editable.
Y Rotation field Displays the rotation of the ground plane on the Y axis. Editable.
Z Rotation field Displays the rotation of the ground plane on the Z axis. Editable.
Filter Settings
Quality field Displays the number of good trackers that are kept, as a percentage. Editable.
Short field Displays the percentage of short duration trackers (trackers that only track a feature for a few
frames). Editable.
Delete button Deletes the selected trackers.
Converting the Camera Analyzer Results
When you are satisfied with the results of the 3D camera tracking analysis, you can convert the selected
reconstructed points to a point locators object or actual axes in your scene. The point locators object is useful
because you can easily snap objects to it.
To create a point locators object or axes from the 3D camera tracking results:
1 In the Analyzer view, select the points in the image that you want converted. Selected points are
displayed as green squares with red crosses.
662 | Chapter 15 Compositing in 3D Space with Action