Perspective View of 3-D Planar Trackers

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‌Perspective View of 3-D Planar Trackers

A 3-D planar tracker's 3-D rectangle is displayed in the perspective window; you can see it moving about from any vantage point.

When you lock the perspective view to the camera, and want the planar tracker to match up with the shot imagery, the camera field of view must match the 3-D planar tracker's.

The planar tracker's FOV is what the tracker says the FOV must be, in order for there to exist a 3-D rectangle that can be placed to match the 2-D coordinates. If the viewing FOV is different, there will be a mismatch.

You can see this in the perspective viewport when it is locked to the camera view. Both the 2-D outline of the tracker and the (reprojected) 3-D rectangle are shown. Normally, with matching FOV, the two rectangles match exactly and appear as one.

But if the viewing FOV is different than the tracker's FOV, there will be a mismatch, and you will see two different rectangles. This is a problem, since your inserted 3-D effects will be based on the 3-D rectangle—here you are literally seeing that your effects will not match up, not only in SynthEyes, but in your downstream 3-D applications either.

So it is crucial that a 3-D planar tracker always be viewed by a 3-D camera that has exactly the FOV that the 3-D planar tracker says it must. (For zooming 3-D planar trackers, the camera must zoom identically.)

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