9

Camera Tracker: Match Move Rollout 681
press H to open the Select Objects dialog (page
1–78). Once selected, the camera name is placed in
the picker button, and other buttons and controls
are enabled in the utility. The selected camera is
remembered in the MOT sett ings file and restored
on reopening the movie in the camera track er. As
w ith the tracker point scene objects, the camera
name is stored and used when reloading, so
make sure it’s unique. The camera selected must
be a Free camera. It can be at any position and
orientation in the scene.
Match group
Lets you choose w hich camera parameters will
be estimated during the match-move. Those
parameters tur ned off will b e derived from the
current Camera animation or position, so it’s
possible to pre-position or pre-animate the match
camera with know n moves or par ameter settings
and have the matcher estimate just the missing
parameters. The accuracy of the estimation
process increases substantially as the number of
parameters that need estimation decreases.
FOV—Camera FOV (field-of-view).
Pan—Rotation about the local camera Z axis.
Tilt—Rotation about the local camera X axis.
Roll—Rotation about the local camera Y axis.
Dolly—Movement along the local camera Y axis.
Tru ck-HMovement along the loca l camera X axis.
Tru ck-VMovement along the local camera Z axis.
Match Range group
Let’s you set the range of frames that w ill be
matched to set up the relat ionship between the
movie fra mes and the 3ds Max scene animation
frames. By default, the start frames are both set to
zero and the frame count is set to the smaller of
the number of fra mes in the movie or the scene
animation. Setting a different Movie Start or
Animation Start frame lets you pos ition the movie
frame range relative to the animation frame range.
Thepositiondataforamatchwillbetakenfrom
the tracker frames starting at the Movie Start
spinner value and the camera will be matched and
animated starting from those frames.
Movie Star t—Sets the start of the r ange to be
matched in the movie.
Animation S tar t—Sets the start of the range in
the animation. Use this if the animation range is
different from the movie range.
Fr ame Cou n t Sets the number of frames to be
matched.
Reset R anges—Reloads the maximum frame
number and count ranges into the match range
spinners from the current movie and 3ds Max
scene settings. This is us eful if you change the
animation frame range in the scene while the
tracker is open.
Animate Displays—Controls whether t he 3ds Max
view port appears and if the Movie window updates
frame-by-frame to show the match results. This
display update can be very time-consuming, so it’s
often b est to leave this tur ned off and review the
match results by looking at the Camera f unct ion
curves in Track View or by stepping through the
3ds Max animation a frame at a time af ter the
match.
Generate K eyframes—Generates keyframes for the
estimated parameters on each fr ame.
Match-Move—Star ts the match process.
Max. Pixel Er ror—Displays the running max imum
tracking error and frame. The error is shown
in pixel fractions, and gives the largest distance
between any feature a nd the viewed position of
its associated t racking object over all the frames
matched. You can use t his to give a general
estimate of how good the match is and the frame
to investigate if errors are problematic. The pixel