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We have been using the OptiTrack API with a TrackIR4 camera, and recently added a second camera to the setup. Unfortunately this seems to be causing problems. The framebuffer of one of the cameras frequently but not always show heavy banding.

Example: http://viskom.se/stripes.png

This only happens when using more than one camera.

[ August 16, 2006, 07:40 AM: Message edited by: wesslen ]

quote:Originally posted by wesslen:
We have been using the OptiTrack API with a TrackIR4 camera, and recently added a second camera to the setup. Unfortunately this seems to be causing problems. The framebuffer of one of the cameras frequently but not always show heavy banding.

Example: http://viskom.se/stripes.png

This only happens when using more than one camera.The banding you see in the image is most likely a result of data not being read from the camera fast enough, here are a couple things you can do to help :

• Avoid using multiple cameras attached to the same USB port via USB Hubs. Plug the cameras directly into the computer on separate USB ports.
• Reduce the rate at which the frames are rendered to the screen. It is not necessary to render every frame that arrives, and it is still possible to process the objects detected in that frame even when it is not rendered.

quote:... and it is still possible to process the objects detected in that frame even when it is not rendered.Unfortunately that does not seem to be the case. Objects are detected as if the banding was part of the original image - generally resulting in a lot of wide boxes.