This is a 25% reduction of Interaxial..done in Post, using the RealFlex method.
Footage was shot with a parallel rig and an original interaxial of approx 3.5 inches
Observations: You lose the top 0.5% of the picture due to distortion. This has to be accounted for.
See more observations and How to on:
http://realvision.ae/blog/2010/08/3d-camera-interaxial-and-convergence-using-...
The reason stereographers may call for a reduction of interaxial, is that on some scenes, they may feel the Positive Parallax (into the screen depth) may cause viewer discomfort.
A good Stereographer however, will NOT always say to reduce interaxial... They try to faithfully re-create as best as possible, the real world. while making a judgement call, depending on the shot or scene... whether interaxial should be reduced, for how long, and by how much.
Please see the follow-up videos, the original and 35% reduced interaxial using the RealFlex method
What's important to note is that this is not a simple H.I.T (horizontal image translation). That would have led to the edges having to be cropped or would require the stereo window to be "floated".
The method used here, re-shapes the "3D volume" or to make it simple, creates new closer spaced interaxials on 3D cameras.
realvisionhomes 1 year ago