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| four cameras in circle https://forum.ipisoft.com/viewtopic.php?f=2&t=5158 |
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| Author: | jbutler [ Thu Jun 23, 2011 4:05 am ] |
| Post subject: | four cameras in circle |
Has anyone tried four cameras arranged in a circle? Can this work OK? The usual setup seems to be in a semicircle. Would there not be enough coverage? |
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| Author: | radiac [ Thu Jun 23, 2011 5:06 am ] |
| Post subject: | Re: four cameras in circle |
Hi. I tried it. I´m sure it run. But my records if i try this, was not good. But it was not a problem with the full circle record. I forgot to start with a clear backgorund ;). Regards |
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| Author: | Greenlaw [ Thu Jun 23, 2011 1:36 pm ] |
| Post subject: | Re: four cameras in circle |
You can do this but I found semi-circle works better with four cameras because there is more over-lap of visual data which can improve accuracy with the tracker. Six cameras is more suitable for full circle recording. G. |
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| Author: | jbutler [ Thu Jun 23, 2011 2:21 pm ] |
| Post subject: | Re: four cameras in circle |
thanks, that's what I suspected about the coverage. I'm sure I'll go to a six camera setup soon. |
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| Author: | Greenlaw [ Thu Jun 23, 2011 2:42 pm ] |
| Post subject: | Re: four cameras in circle |
BTW, even a semi-circle coverage is pretty accurate for many actions. Obviously, six cameras is better but I've done complete 360 degree walks using a four camera semi-circle setup and got pretty good tracking results with minimal clean up required. |
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| Author: | jbutler [ Fri Jun 24, 2011 1:41 am ] |
| Post subject: | Re: four cameras in circle |
I did a 4 cam semicircle test shoot last week, which mainly served to point out problems, like the actor putting her feet too close together in T pose. The calibration process worked fine, thanks to all the tutorials available. Yesterday's kinnect captures have worked out really great, and my jittering is gone. I think the more you work and experiment with ipi, the better it gets. I'll post some rendered results soon. This is the best piece of software I've found in years. I imagine kinnect might increase in resolution in the future and work in multiple configurations, so this is just the beginning. |
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| Author: | Greenlaw [ Fri Jun 24, 2011 8:46 am ] |
| Post subject: | Re: four cameras in circle |
For T-Pose I found that standing with legs and parallel, feet apart and aligned under hips, works very well. In other words, the closer you are to the iPi rig's T-Pose, the better. It's also good to stagger the heights of the cameras, maybe between four to eight feet. I can't really be too specific as this may depend on the size and shape of your shoot space. And yes, like anything, you get better at this through practice. :) G. |
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