3D Compositing with Action > Action: Analyzer > Camera Tracking >
Analysis Settings

Use the Analysis settings before clicking Track. The Analysis tab of the Analyzer menu is divided into a number of sections.

Lens Correction Settings

Use the these settings if you want the analysis to take lens correction into account.

Lens Correction Mode box
  Select Manual and set the Magnitude and Adjust fields if you want to apply lens correction during analysis.
Magnitude field
  Displays the magnitude of lens correction.
Adjust field
  Displays the level of secondary adjustment of lens correction.

Contraints Settings

Use the constraint settings pass information to the analyzer about any mattes or masks in the scene.

Matte Media box
  Select whether a matte is used for tracking.

Select: | To:
--- | ---
Ignore Matte | Not use a matte.
Track Inside Matte | Use a matte to delimit the tracking results. White areas of the matte are considered for calculating the solution, and black areas are ignored.
Track Outside Matte | Use an inverted matte to delimit the tracking results. Black areas of the matte are considered for calculating the solution, and white areas are ignored.

GMask Option box
  Select whether to track inside or outside the shape of attached GMask(s). While in an Analzyer view, you can add a GMask node and instantly draw the constraining mask. If added while in Analyzer view, the GMask and Axis nodes are automatically connected to the image as part of the Analyzer tree. If you want to use an existing GMask node, make sure that you parent the Surface (mono analyzer) or Stereo Object (stereo analyzer) to the Axis of the GMask in the schematic.

  If the area to be constrained is moving, you can perform shape tracking from within the GMask menu. See Tracking a Mask.

Camera Settings

Before analysing the 3D motion, define your camera properties. The camera represents the device used to acquire the sequence of images you are tracking. For each camera parameter, you can choose to let the auto 3D tracker calculate the value automatically or you can specify the value yourself. This information can help the automatic 3D camera tracker calculate better results.

NoteYou can set the camera properties before initial tracking, or after initial tracking when calibrating or refining the track.

Camera Type box
  Select the type of camera used to shoot the scene.

Select: | To:
--- | ---
Free 3D Motion | Track a clip shot with a free-moving camera.
Pan and Tilt | Track a rotating clip shot with a camera on a tripod.
Auto Detect Motion | Automatically detect the camera type and track accordingly (default value).

Focal Length Option box
  Select whether to let the tracker calculate camera values automatically, or if you know the properties of the camera that shot the scene, switch to Manual Focal Length, and set the length and film back settings.
Zoom button
  Enable to calculate the zoom value of the reconstructed camera for each frame (assuming the camera that shot the tracked clip has a variable zoom value). By default, Zoom is disabled (that is, the track analyses with a fixed zoom).

NoteBefore initial tracking, if Zoom is enabled, Auto Focal Length is the only choice. You can switch to Manual Focal Length only after initial tracking to clean up the FOV animation before refining or calibrating.

Length field
  Displays the focal length of the camera, in millimeters.
Film Ratio field
  This locked field displays the film aspect ratio of the camera.
Film Back box
  Select the film back size preset of the camera that shot the scene.
Height field
  Displays the height of the film back.
Width Units box
  Select the unit of measurement (inches or millimeters) for the film back height.

Stereo Analysis Settings

The Stereo Analysis settings display information about the FBX camera after a stereo analysis is performed. These are locked fields, and are meant as informational only.

Stereo Mode field
  Displays the stereo mode of the FBX camera after a stereo analysis.

Interaxial Separation field
  Displays the interaxial distance between the left and right cameras of the the FBX camera after a stereo analysis.

Zero Parallax field
  Displays the distance on the camera view axis (where the zero parallax place occurs) of the FBX camera after a stereo analysis.