User Manual

Table Of Contents
Reset
Deletes all the data internal to the Camera Tracker node, including the tracking data and the
solve data (camera motion path and point cloud). To delete only the solve data, use the Delete
button on the Solve tab.
Preview AutoTrack Locations
Turning this checkbox on will show where the auto tracks will be distributed within the shot.
This is helpful for determining if the Detection Threshold and Minimum Feature Separation need
to be adjusted to get an even spread of trackers.
Detection Threshold
Determines the sensitivity to detect features. Automatically generated tracks will be assigned to
the shot and the Detection Threshold will force them to be either in locations of high contrast or
low contrast.
Minimum Feature Separation
Determines the spacing between the automatically generated tracking points. Decreasing this
slider causes more auto tracks to be generated. Keep in mind that a large number of tracking
points will also result in a lengthier solve.
Track Channel
Used to nominate a color channel to track: red, green, blue, or luminance. When nominating a
channel, choose one that has a high level of contrast and detail.
Track Range
Used to determine which frames are tracked:
Global: The global range, which is the full duration of the Timeline.
Render: The render duration set on the Timeline.
Valid: The valid range is the duration of the source media.
Custom: A user determined range. When this is selected, a separate range slider
appears to set the start and end of the track range.
Bidirectional Tracking
Enabling this will force the tracker to track backward after the initial forward tracking. When
tracking backward, new tracks are not started but rather existing tracks are extended backward
in time. It is recommended to leave this option on, as long tracks help give better solved
cameras and point clouds.
Gutter Size
Trackers can become unstable when they get close to the edge of the image and either drift or
jitter or completely lose their pattern. The Camera Tracker will automatically terminate any
tracks that enter the gutter region. Gutter size is given as a percentage of pattern size. By
default, it’s 100% of pattern size, so a 0.04 pattern means a 0.04 gutter.
Chapter – 107 Tracker Nodes 2420