User`s guide

Chapter 9 Motion Tracking
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Target Update Criteria menu Determines how often the motion of the target is estimated.
The choices include:
Always Update. Creates the motion estimation between two
adjacent frames in time.
No Update. Creates the estimation between the frame at the
keyframe and the current frame. If your target object does
not change through the course of the video, use the No
Update or Auto Update option.
Auto Update. Creates the estimation once with the target
from the previous keyframe. If the estimation fails—that is,
the error is greater than the Threshold setting, then the
estimation is re-calculated with an updated target. If the
tracker fails again, the tracker will either project the previous
estimate or assume no motion, depending on the Failure
Mode and Failure Threshold.
Threshold Determines the quality at which the tracker should revert to
another update method by measuring the similarity between
the target image and the best match in the search region.
Requires Target Update Criteria menu option set to Auto
Update.
Failure Mode menu Select an option if the quality is below the Threshold value.
The choices include:
Continue. Causes the tracker to project the data from the
previous frame. This preserves the object's inertia. Use the
Failure Threshold to adjust the accuracy.
Wait. Assumes no motion, forcing you to set a new keyframe
to continue the analysis. Useful when an object moves off
screen and returns. The tracker will wait until the object
returns and detect the object. Use the Failure Threshold to
adjust the accuracy.
Ignore. Does not use the Failure Threshold setting, so the
tracking data is returned regardless of quality.
Stop Tracking. Does not use the Failure Threshold setting.
It simply stops the tracking so that you can reset your Search
and Target parameters.
Color Specifies the color used to draw the average position of the
trackers.
Parameter Description