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Selecting a Planar Tracker Mode
Once you've chosen the main frame, you need to decide on the type of planar tracker.
SynthEyes offers a selection of different planar tracking modes, which describe what you know about the scene and what is being tracked; what is changing and what must be held constant. The 3-D modes provide a simple 3-D solve from a single tracker, while a 2-D tracker can be used for a 4-corner pin, or to provide one of the many tracks required for a conventional 3-D solve.
|
2D Modes |
3D Modes |
|
2D Translation (2D T) |
3D Perspective |
|
2D Translation and Scale (2D TS) |
3D Known Field of View (FOV) |
|
2D Translation and Rotation (2D TR) |
3D Zoom |
|
2D Translation, Rotation, and Scale (2D TRS) |
3D Known Aspect |
|
2D Translation, Rotation, Scale, and Aspect (2D TRSA) |
3D Known FOV, Aspect |
|
—*** |
3D Zoom, Known Aspect |
The 2D modes offer different degrees of freedom, depending on whether the pattern can rotate or not, or scale or not. An aspect-changing mode is available as well, which gives an approximation to 3D perspective changes, as a 2D tracker.
[***: We may offer an "anything-goes" mode as well, it's unclear just how much that is necessary.]
The 3D modes include variations on what the lens is doing, mirroring the SynthEyes Lens Panel: whether the camera lens is fixed and unknown; whether it is Known (it may be a known constant or known varying values); or whether it is an unknown Zooming camera. The Known modes are used to accommodate on-set information, to integrate with an existing 3-D solve, or when there are several 3-D planar trackers present (see Adding More 3-D Planar Trackers).
A second set of 3D modes encompasses the situation where you know the aspect ratio of the planar surface being tracked. That known aspect might come from on-set measurements, or a known circular or square shape; it gets placed in the Planar Option panel's 3-D aspect spinner. (See Measured Height and Width: Known Aspect in this manual.)
Based on what you're tracking, the nature of the shot, and what you want, you can select the mode. Once you turn on the Create wand on the Planar control panel, you can set the tracking mode. If there is an existing planar tracker already selected, control/command-D to unselect it, to avoid changing it. Set the planar tracker mode to the one you want.
©2023 Boris FX, Inc. — UNOFFICIAL — Converted from original PDF.