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Old 08-30-2008, 02:18 PM
Jerry Hill Jerry Hill is offline
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Default Image manipulation for time slice (Bullet Time0 - Premiere CS3

This is in advance of the need, but something that would be best to get right before a lot of work.

I'm DIY'ing a time slice rig. I call it that in honour of the English guy that invented it in modern terms, rather than the 'Bullet Time' label adopted by the team that did 'Matrix', as their's is far more sophisticated and uses CG, green screen and all manner of other tools to get the effect.

My rig is only twelve cameras, so fourteen with the two video cams at either end, so I'll be getting half a second of effect without resorting to morphing the images to make up for gaps between the frames.

The question is aboout the manipulation of the images to get the smoothest transition between them. Tests have shown that the exposures from each camera is very well balanced, I've not needed to correct any at all so far. So long as they are matched to the video cameras at each end, which is mostly white balance, perspective and DOF issues, the only thing left to do is fine tuning of the alignment of the subject, because with any amount of camera position setting this is still needed (I note the Bullet Time people have the same problem looking at their raw footage). Many say that this is best done in a bitmap editor, but as the video footage is HD, and I'm using similar resolution with the still cameras, I'm finding it easier to simply jiggle the images around in CS3 using transparencies as a means of checking the alignment of each frame.

Am I missing something? I have plenty of lattitude for this position adjustment, and the resolution/compression of the images seems to give me acceptable results.
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