Very slow calibration

[Armel]

Hello.

I'm working with a 10 V100 R2 cams OptiTrack system using Arena 1.6.3. I'm calibrating using the 3 markers rod.

After wanding during 30 to 40 s, I get the message that it should be enough for high quality. This seems to prove that my cams are not badly placed.

However, after that, the calibration algortihm is very slow. Quality remains poor after several minutes (up to one hour!).

Did someone have the same problem? Thanks for any help.

Armel.

[DonBurroni]

this happened to me during my first calibration with the new version, restart and see if it works,

I ended up removing arena, and doing a reinstall.

Works great now. (must be a little bug)

All the best
Burroni

[VincentG]

Also, you can continue to wand (as long as you want, but several more minutes would be better), which increases the number of points for the calibration to work off of.

[beckdo]

The algorithm only gives wanding feedback based on the quality and amount of 2D camera data. It doesn't know if there is sufficient overlap between cameras to converge. If you're having problem with convergence, the easiest thing to do is to point the cameras more towards a central location. This is the simplest thing you can do to help ensure proper and reliable convergence.

[JustinDenton]

I am running 24 R1 Cameras and I also had some very long calibration times and poor results when I was working on repositioning my cameras.

I think Doug's advice is spot on here.

I had to reposition my cameras so they had more overlap. Now, when I'm first setting up a volume, I start by pointing all my cameras at a central point, and seeing what my quality and volume size results are. Then I start to SLOWLY move cameras so that they dont see as much of the central point and keep calibrating along the way. Takes a lot of time, but by doing it this way I have always been suprised by how much volume I have managed to get out of my spaces.

You can also try putting markers at the corners of where you would like your volume to reach to as well. This will help you see a visual balance of the center of your volume and what you hope is your outer edges.