2011

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with no other details that may change throughout the footage, you minimize
the possibility of the tracker losing the reference point.
NOTE Sometimes a small reference point does not give good results. Try enlarging
the box to include more of the selected feature. Note that the larger the box, the
slower the analyzing speed.
Resize the tracker box, so that it is large enough to accommodate the most
frame-to-frame movement of the reference point. For example, if the
movement of the reference point is mostly horizontal, you can increase the
width and reduce the height of the tracker box. If there is a large amount of
movement both horizontally and vertically, increase both the width and the
height of the tracker box.
(a) Reference box (b) Tracker box
To resize the reference and tracker boxes:
Do one of the following:
Resizing the Reference and Tracker Boxes | 765