User Manual

A pattern box positioned over an eye you want to track.
When you add a Tracker node to the Node Editor, you start with one pattern box displayed in
the viewer as a small rectangle. When the cursor is placed over the pattern rectangle, the
control expands and two rectangles appear. The outer rectangle has a dashed line, and the
inner rectangle has a solid line. The outer rectangle is the search area, and the inner rectangle
is the pattern.
If you need to select a new pattern, you can move the pattern box by dragging the small (and
easily missed) handle at the top left of the inner pattern box.
To move a pattern in the viewer, drag it from
the upper-left corner.
While moving the pattern box, an overlay pop-up appears, showing a zoomed version of the
pixels contained within the rectangle to help you precisely position the pattern via the
crosshairs within.
A zoomed view appears while you drag a
pattern box to help you position it.
The pattern rectangle can also be resized by dragging on the edges of the rectangle. You want
to size the pattern box so that it fits the detail you want to track, and excludes area that doesn’t
matter. Ideally, you want to make sure that every pixel of the pattern you’re tracking is on the
same plane, and that no part of the pattern is actually an occluding edge that’s in front of what
you’re really tracking. When you resize the pattern box, it resizes from the center, so one drag
lets you create any rectangle you need.
Chapter – 73 Using the Tracker Node 1496