Calculating 3D camera positions from a video

Posted by Geotarget on Game Development See other posts from Game Development or by Geotarget
Published on 2012-07-05T09:12:23Z Indexed on 2012/07/05 9:23 UTC
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camera

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matrix

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rotation

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video

I need to calculate the 3D camera position and rotation for each frame in a given video. This is typically used for motion-tracking, and to insert 3D objects into a video. I'm currently using VideoTrace to calculate this for me, and I'm getting the data exported as a 3DS Maxscript file. However when I try to use the 3D camera rotations, I'm getting strange errors in my 3D calculations, as if there is an error with the 3x3 rotation matrices. Can you spot any error with the data itself? Or is it my other calculations that are erroneous?

frame 1

   rotation=(matrix3[-0.011938,  0.756018, -0.654442][-0.382040, -0.608284, -0.695727][-0.924068,  0.241718,  0.296091][0, 0, 0]).rotationpart
   position=[-0.767177,  0.308723, -0.232722]
   fov=57.352135

frame 2

   rotation=(matrix3[-0.460922, -0.726580, -0.509541][-0.200163,  0.644491, -0.737947][ 0.864572, -0.238145, -0.442495][0, 0, 0]).rotationpart
   position=[-0.856630,  0.198654, -0.243853]
   fov=57.352135

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