2017

Table Of Contents
2 Place the cursor in the image window.
The cursor changes to a magnifying glass.
3 To zoom in, drag the cursor to the left. To zoom out, drag the cursor to the right.
Action Analyzer
Use Action's Analyzer to compute the path of live-action camera and object motion in 3D space. Using the
calculated position and motion of the virtual camera, you can match image sequences perfectly, placing
any element in the scene. The perspective of the element you place in the scene changes with the perspective
of the background as the camera moves. The virtual camera motion is intended to be identical to the motion
of the actual camera that shot the scene.
Use the following workflow as a quick start guide to the Analyzer. Follow the links for more detailed
information.
Step 1
Select back or front/matte media (mono or stereo) to analyze and add an Analyzer node.
Optional steps:
Perform a lens correction.
Adjust the four corners of the perspective grid to set the focal length.
Add manual trackers to obtain a more predictable and consistent result.
NOTE Adding manual trackers can be initiated post-process.
Tracking using the Analyzer Node (page 649)
Step 2
Perform Camera Tracking in the Analyzer menu.
Optional steps:
Add mask constraints to moving areas or areas not wanted in the analysis. The Constraints settings are
unavailable on Smoke, unless a setup is loaded in Action with existing mask information.
Add properties of the camera that shot the footage to be analyzed.
646 | Chapter 15 Compositing in 3D Space with Action