8

Camera Tracker: Movie Rollout 647
• A set of trackable features in the movie, such as
wall markers, ba lls, corner points and so on,
for which position measurements are known.
The tracker will track most small features
w ith goo d contrast to their su rroundings,
have a well-defined position in space, and are
unique within their frame-to-frame areas of
movement. There must be six or more tracking
features in the scene at any one time, at least
two of which must b e non-coplanar with the
others, for example four on the ground and
two elevated or three on one wall and three on
another. For maximum match accuracy, you
shoulduseasmanyfeaturesasyoucanand
select the features that are dist ributed as widely
as possible over the scene. The features don’t
have to be in any p articular planes.
• A3dsMaxscenefileinwhichasetofpoint
objects have been created and positioned in 3D
corresponding to all the t r acking features in the
scene. The objects should be point or CamPoint
helper objects. The tracker will match-move a
selected Free camera in the scene, so you need
to have at least one Free camera. You can place
and orient it anywhere in the scene.
Camera Track er: Movie Rollout
Utilities panel > Utilities rollout > More button > Utilities
dialog > Camera Tracker > Movie rollout
Opens the movie for tracking. Also provides
controls for the display of the movie, including
fade display to improve the visibility of the
trackers. Provides controls for loading and saving
MOT files in which tracker information is stored.
Interfa ce
Movie file—Selects a nd opens the movie that will
be tracked. You can open any image fi le for mat
that 3ds Max suppor ts. If you use sequential
still-image files, you will use an .
ifl (image file
list) file. You can create the
.ifl file using the IFL
Managerorusinganybitmapselectordialogby
choosing Sequence. When you open the movie
file, it’s displayed in a Movie window.
Display Movie—Reopens a closed or minimized
Moviewindow. YouusetheMoviewindowto
setup a nd adjust feature tr ack ing gizmo s and
to browse through the movie. For more details
on working with the Movie window, see
Motion
Tracker rollout (page 2–650)
.
Show frame—Allows you to step through the movie
displayed in the Movie window. Alternatively,
use the Movie Stepper rollout, which provides
additional browsing controls.
Deinterlace—Causes the t racker to apply a video
deinterlacing fi lter to the movie frames. If the
movie comes f rom a v ideo source and the features
you’re tracking show marked interlacing, you
should deinterlace the video to improve tracking