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| 8 camera setup for 20 foot diameter capture area https://forum.ipisoft.com/viewtopic.php?f=7&t=9401 |
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| Author: | lelapinblanc [ Sat Jul 18, 2015 9:03 am ] |
| Post subject: | 8 camera setup for 20 foot diameter capture area |
I have a question about my setup. I have yet to have located a space for this setup and I am advertising for a 48x48 foot area with no obstructions. Here is why: My setup is 8 PS3 eyes on tripods, in a circle, one camera every 45 degrees. If a person who is 5'10" stands in front of the camera with their hands raised over their head they would need to be 9 feet from the camera to capture them without clipping feet or hands. I layout a 20 foot diameter circle. Then I layout 38 foot circle from the same center point. The reasoning being that the first 9 feet in front of each camera has the potential to clip off parts of the performer. Is this a reasonable setup? How much light is needed for this setup? what if I added 8 more cameras at a different height along the circumference of the 38 foot circle for a total of 16 cameras? I have the Pro subscription. What are the recommended heights for the cameras? Leaving a 5 foot area outside the largest circle means we need a 48x48 space. So far my experience has been great. I just have to clean up wobbly feet and arms and legs that wander. Steve |
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| Author: | pas [ Fri Jul 24, 2015 9:43 am ] |
| Post subject: | Re: 8 camera setup for 20 foot diameter capture area |
Hello, first, we do not recommend to get out of sight in any camera during tracking. This often leads to tracking errors that require manual clean-up, which takes time. So just use "inner" circle. In you case it can be up to 30 by 30 feet (48 - 9 - 9 = 30). We ourselves tested setup with maximum distance from camera to actor around 30 feet. With bigger distance (you have around 40 feet) there is a risk that actor image on video become too small for tracking. But you can give it a try. For single-actor capture 8 cameras is quite enough. Circle setup you described is perfect, but we recommend to place 3-4 cameras at increased heights (8-10 feet). Adding more cameras is always good, but this increase processing time. If you plan to track multiple actors, you'd better use 12-16 cameras. Circle setup with 1/3 of cameras at increased heights is the best option. Lighting ideally should be ambient. Actor clothes colors should be clearly distinguishable, and look the same in all cameras. |
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