Mixed Nodal and Normal Shots

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‌Mixed Nodal and Normal Shots ‌

Some shots are more complex: they contain both sections where the camera translates substantially, and where the camera pans substantially without translation. For example, the camera dollies down a track, looking to the left, reaches the end of the track, spins 180 degrees, then returns down the track while looking to the right.

Such a shot is complex because none of the trackers visible in the first section of the shot are visible in the third portion. During the second panning-tripod portion, all the trackers must be “Far” and can have no depths because the camera never translates during their lifetime. Taken literally, and of course we’re talking computers here, mathematically there is no way for SynthEyes to tell what happened between the first and third sections of the shot—the camera could have translated from here to Mars during the second section, and since the Far points are infinitely far away, the tracking data would be the same.

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