2010

Table Of Contents
3 In the PointCenteredCamera view, position the track box to match the
following illustration.
Knowing where to position the track box involves two important factors.
One factor is the pattern framed by the inner target box. This pattern
must have at least some contrast and must be distinct from the
surrounding region that is framed by the outer box. By having a distinct
pattern within the inner target, you will prevent the tracker from jumping
off target and onto a similar pattern.
Another important factor is choosing where you place the cross-hair. You
want it to be over a spot that you can recognize in later frames when the
pattern changes. By aligning the vertical cross-hair line with the post
edge and the horizontal cross-hair line with the bottom of the post, you
can identify this same spot in later frames.
4 Type fenceCorner in the Name setting.
5 Click Start Track.
The tracker stops around frame 60 or 80 because the corner falls out of
view. The track box also moves off target toward the end. You will correct
both of these tracking problems in the next steps.
Tracking additional points | 991