2010

Table Of Contents
This graph shows how closely Live matched the track boxs pixel pattern
on each frame. Specifically, Live compares each frame and the frame
before it to see how well they match. Green is a good match, yellow is a
warning, and red is a stronger warning.
As illustrated, the green region drops over time, leaving the graph mostly
yellow toward the end. This is a normal occurrence, caused by the
changing pixel pattern of the point you tracked. In this case, you can
ignore the yellow color, because the main evaluation toolthe movie
fileindicates the track is on target.
NOTE The curved blue (or red) line next to the track point is a trace line. It
is an optional tracking feature you will not use in this lesson.
Tracking additional points
Now that youve tracked one point successfully, youll continue with tracking
a different spot in the image sequence. In general, you keep tracking points
until you have enough to solve. (You will learn how to make this determination
later in the lesson.)
The point you are about to track demonstrates what to do if the spot falls out
of view midway in the shot.
To track the fence corner
1 Go to frame 1.
2 Click Create and drag the track box over the bottom corner of the far
right fence post. If you have trouble dragging the track box, click the
track box tool again:
990 | Chapter 20 Live