Setting Camera Properties for Automatic 3D Camera Tracking

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.

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(a) Camera Type box (b) Focal Length box (c) Film Back box

The Camera and Film Back controls are described as follows.

Camera Type boxSelect 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	Automatically detect the camera type and track accordingly (default value).

Focal Length boxIf you know the properties of the camera that shot the scene, switch to Manual Focal Length, and set the length and film back settings.

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 fieldEnter the focal length.

Focal Length Units boxSpecify inches or millimeters to be used as the length.

Zoom buttonEnable 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).

Film Back boxSelect the film back size preset of the camera that shot the scene.

Width fieldEnter the width of the film back.

Width Units boxSpecify inches or millimeters to be used as the width.

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