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Digital Compositing for Film and Video by Steve Wright

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CHAPTER 8

Action

Many shots are complete when the lightspace and camera attributes of the compositing layers match, but some shots will require you to match the action, or motion, as well. Motion tracking is one of the key tools for this, and is used to track one element onto another to create a match move. Yet another application of motion tracking is to stabilize a shot. Both of these processes and their variations are described in this chapter, along with some helpful tips, tricks, and techniques.

Geometric transformations, both 2D and 3D, are used to change the shape, size, and orientation of images as well as to animate them over time, as in the case of motion tracking. An understanding of the effects of pivot points and filter choices ...

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