2010

Table Of Contents
Ideally, Overall Pixel Slip should be less than 2. But this doesnt mean
the solution will mimic the live footage camera movement satisfactorily.
In the next steps, youll find out whether it does.
If Overall Pixel Slip reads poor or a number higher than 2, you need
to fix a problem in your track points. Return to the Track control panel
and repeat the instructions
Preparing to solve on page 994.
If you still cannot reach a solution below 2, we recommend you continue
the lesson using a scene we have prepared for you. Choose File > Open
Scene, navigate to the MayaLiveLessonData/scenes directory, and
double-click goodPoints.ma. Live loads a scene with the same track points,
carefully created to avoid problems. When you click Solve in the
goodPoints scene, your Overall Pixel Slip will read about 1.0.
2 Play the animation and tumble the perspective view while the animation
plays so you can see how the camera moves.
You need to judge whether the camera moves the way you expect. You
know the camera starts above the set and moves down, so it should start
above the locators and sweep down in the same way. Compare the frames
in the following illustration.
In this case, the camera starts below the locators and moves up instead
of down. It also makes a series of abrupt movements. This solution is
incorrect.
3 Stop playing the animation.
4 For further evaluation, examine the graphs in the panel on the lower left.
This is the Locator Summary.
The Locator Summary graphs the pixel slip of each point over time. You
already looked at the overall pixel slip, but the Locator Summary lets you
find which point has the most pixel slip and on which frames.
998 | Chapter 20 Live