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| Number of actors vs number of cameras https://forum.ipisoft.com/viewtopic.php?f=6&t=4957 |
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| Author: | TH98 [ Tue Mar 22, 2011 10:36 am ] |
| Post subject: | Number of actors vs number of cameras |
Hi! I'm interested in doing motion capture of multiple (probably mostly two) actors and I've seen it written that this only works if they don't occlude each other. My question is: what if I have 4 cameras and there is only occlusion on 1? If I add 2 more cameras, will that give me more freedom to capture actors standing close together? Or does the program have difficulty tracking if there is overlap on any of the cameras? Would it help if the actors wore different colored clothing? Thanks! |
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| Author: | TH98 [ Tue Mar 22, 2011 10:40 am ] |
| Post subject: | Re: Number of actors vs number of cameras |
Damn it, sorry for the duplicate threads. My phone kept telling me the connection was lost. |
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| Author: | Greenlaw [ Tue Mar 22, 2011 11:27 am ] |
| Post subject: | Re: Number of actors vs number of cameras |
This really depends on the performance you want to capture. If it's dance, for example, you're better off capturing each dancer in his own pass. Actually, this is a good rule for almost any multi-character performance, from conversations to fighting. You can sync the performances by having the performers act to a music track, audio or video. This has been working very well for our animated music video project. To get the mocap to 'interact' with precision, you can edit and re-time the motions for multiple characters simultaneously using Motion Builder, Animeeple, or other 3D application. If you absolutely must get multiple performances in one take, to get the best results the entire body of each performer really should be fully visible to all the cameras. This becomes very impractical in a small space unless the actors are basically just standing in place, in which case you may as well shoot them separately anyway. Another option is to use the Kinect, and have the actors perform side by side in clear view of the camera. Be advised that the Kinect's range of what it can capture is somewhat limited when compared to a multi-camera setup. For example, no walking in circles. In quick tests I've done, walking towards camera seems to work okay though. (To be honest, I haven't spent a lot of time with the Kinect setup but that's been my impression so far.) Hope this helps. G. |
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| Author: | SuperFrofessional [ Mon Jun 11, 2012 12:32 am ] |
| Post subject: | Re: Number of actors vs number of cameras |
greenlaw, have you done any more multiple actor motion capture sessions? I am assuming you fitted one actor, processed him. then started over with the second actor? are there any work-arounds for processing both actors at the same time? ps - I just watched your film and it's absolutely hilarious. the transformer/transgender joke literally had me laughing out loud. |
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