8

Camera Tracker Utility 645
Procedure
See the Camera Tracking tutorial for hands-on
instruction about using the Camera Tracker.
Togenerateacameramatch-move:
1.
Open the working scene in 3ds Max.
ThesceneshouldhaveaFreecameratobe
match-moved, as the tracker does not create
one. The scene also should have a set of P oint
or CamPoint helper objects positioned in
3D to correspond to the tracking features.
Optionally install the movie as an environment
map-basedbackgroundimageinthematch
camera view port. This is needed if you want
to render a composite using the match-move
or checking match accuracy. This doesn’t
automatically display the background image in
the viewport. Use Views > Background Image
toselectthebackgroundmovieanddisplayit
in the viewport.
Real-world c amera films a scen e (the white dot s will be
tracking points).
2. Open the movie file in the Camera Tracker
utility and create a set of feature tr acking
gizmos for each of the tracking features in the
scene.
Resulting footage to be trac ked and used as a
backgroun d.
3. Position the Feature Selection box and Motion
Search box for each gizmo so that they’re
centered on the features and have motion
search bounds large enough to accommodate
the biggest fr ame-to-frame move of the features
throughout the f rames that wil l b e tracked.
4. Associate each tracker with its corresponding
scene point object.
The associated scene point objects are set up in 3D
space based on real-world dimensions.
5. (Optional)UsetheMovieStepperrolloutto
set the start and stop frames for each tracker if
it’s out-of-view for any of the frames that will
be matched. These specify the frame range
during which the tracker is visible in the scene
and wi ll be tracked as part of the matching