Running the tracker

By default when you run the tracker the whole of your sequence is tracked (as defined by the key types). If you want to track points for a subset of your sequence you must create a time range.

You can run the tracker in three ways:

A forward track
A backward track
A bi-directional track

The tracker stops when:

It reaches the beginning or end of the sequence or time range.
The match falls below the quality set in the tracking parameters box.
It reaches a Begin or End key point.
The point is about to leave the image.

To check the quality of the tracking you can zoom on the image to view the pixels. Do one of the following then zoom on the track:

Select View > Lock On Track.
Right-click in the 2D View and select Lock On Track from the pop-up menu.
Click the Lock On Trackicon in the Workspace.

About the tracking monitor

When you run the 2D tracking process, the Track Monitor appears in a toolbox window. It shows a zoomed view of the point being tracked through the sequence.

Running the tracker forward or backward

You can launch the tracking process in a forward or backward direction. Only one key point is necessary to track either forward or backward, but it must be either a begin key or an intermediate key. Only one point can be tracked at a time. When more than one track is selected, the tracking function is disabled.

To run the tracker forward or backward, either:

Select 2D Tracking > Track Forward or Track Backward.
Right-click a track in the 2D View, the Point Tracks folder in the Project window or the Track Window to open the pop-up menu and select Track Forward or Track Backward.
Click the Run/Stop Track Forwardicon or Run/Stop Track Backward icon in the Toolbar.

MatchMover launches the 2D tracker. Notice that by default the Tracking Monitor opens showing the point being tracked through the image sequence. A colored line in the Track View shows the track as it is tracked.

TipTo obtain the best results, when you have placed two key points in a sequence, use the option Bidirectional.

Running the tracker in bidirectional mode

This option launches the tracking process in a forward and backward direction. There must be at least two key points enclosing the segment or sequence to track. Use this option when there is some deviation of the point through the track sequence.

By blending the two trajections produced by forward and backward tracking, MatchMover guarantees that the final point track has a smooth trajectory that passes exactly through the two enclosing key points.

To run the tracker bidirectional, do one of the following:

Select 2D Tracking > Track Bidirectional.
Right-click a track in the 2D View, the Point Tracks folder in the Project window or the Track Window to open the pop-up menu and select Track Bidirectional.
Click the Run/Stop Track Bidirectional in the Toolbar.icon

MatchMover launches the 2D tracker.