Opentrack jittering looking down [Solved]

[Leon_Portier]

When I look down in Opentrack the view bobs around. Its about 1 degree I think, so if I zoom in to read the gauges it gives a hard time. 

If I look down and to the left there is the same problem way more accentuated, I cant keep the view still. In such cases it becomes unresponsive too, the headmovement starts to lag and becomes unresponsive. On looking down the output nears -90° Pitch.

 

Im using Aruco tracker and a Microsoft HD webcam which captures at 480p at 30 fps.

It is positioned at the top left of the screen. [Edit: Its about 60 cm distance from me.]

The output is freetrack 2.0 enhanced with default options.

The filter is the accela one.

Smoothing 10ms. Rotation filtering sensetivity 1.1°, Deadzone 0.03°. Rotation linearity is on standart X^1.05.

 

Any Ideas?

Cheers!

 

Edited solved 12.11.17!

Edited November 12, 2017 by Leon_Portier

[No_85_Gramps]

I use OT but not with the aruco marker but a couple of things you might try. Have you run the calibration set-up for the marker ? Do you have any deadzones set in the mapping controls? Usually unresponsiveness and lag indicate loss of tracking data. Not much help but here is a link to the OT aruco wiki: https://github.com/opentrack/opentrack/wiki/Aruco-tracker

 

Is it possible that you could capture a small video showing OT running?

[Leon_Portier]

Ok, I recorded two videos and gathered some screen shots that seem useful.

It looks like it tracks the paper marker without loss. 

There does not seem to be much documentation on the aruco tracker, I couldn´t find out how to use the "toggle calibration" button. There is usually a specivied way to move around, but I could not find it.

I set the mapping up so the view snaps a bit to the cross hair. Not sure what you meant with deadzone.

See pictures in the spoiler section.

 

Cheers!

 

Video 1:

 

Video 2:

 

 

Pictures:

 

 

 

 

 

Edited November 12, 2017 by Leon_Portier

[No_85_Gramps]

Okay, for the calibration, click toggle calibration, then, with the tracker mounted on your head, pitch up to maximum, yaw right, pitch down to maximum, yaw left, pitch up to maximum, yaw right to the center, then pitch down to center, then hit the toggle calibration button again. It's like you are making a big circle around your monitor. As far as the mapping take a look at this pic and you can see a flat (deadspace) area at the beginning of the graph, this can help a lot with unwanted movement. 

[Leon_Portier]

Hey, thank you so much! This fixed it and even some problems I wasn´t even aware of! 

And the Rotation nonlinearity slider in the filter options did the rest, bumped him up to x^1.25.

I prefer a way less sensitive zone to a dead zone tho.

 

Cheers!

Edited November 12, 2017 by Leon_Portier

[No_85_Gramps]

Great! Glad you got it sorted out. Just out of curiosity what part of Bavaria do you live in? I lived in Berchtesgaden from late 1979 to late 1983, my wife and I really miss Germany. Take care.

[Leon_Portier]

Ah a cold war veteran!

I live in Niederbayern [lower bavaria] about 2.5 car hours north.

[No_85_Gramps]

I some day hope to get back for a visit.