List
Image Tracking Stabilisation
Posted Date: 2019-04-29 8:59     Edited Date: 2019-05-01 8:55     Writer: inactive

1. SDK Version: 4.1.1
2. Development Environment: Unity-iOS
3. Tracker/Scanner: Image (Single or Multi)
4. License Type: Free
5. Target Device(Optional): iPhone 10 Xs, iPad Pro 9.7

I'm using Multiple Image or Single Image tracking and attaching a 3D model to that image. 

I have the World Mode set to Camera. (as I require Multi image tracking which isn't supported with Target mode)

Technically everything is working well, but the model shakes.  I've activated Jitter Control but the effect is too extreme, everything is very floaty and slow to react.

I'm looking for a way to stabilize the detected position of the image anchor to reduce the jitter.  Do you have any suggested approaches, or way to adjust the strength of the jitter control?

Thanks

Rob.

 

Posted Date: 2019-04-29 9:13     Edited Date: 2019-04-29 9:13     Writer: inactive

Do you mean the model is very shaken even though you used the Jitter Reduction option?

 

Leo

Maxst Support Team

Posted Date: 2019-04-29 9:36     Edited Date: 2019-04-29 9:36     Writer: inactive

Hi Leo

With Jitter Reduction enabled the model is stable, but when you move the image it's tracking the model drifts to slowly to it's new tracked position/rotation.

It would be ideal if you could set a Jitter reduction level. as the Jitter reduction fixes the jitter issue, but is then causing any movement of the tracked images to update too slowly for my needs.

Thanks

Rob.

Posted Date: 2019-04-30 0:25     Edited Date: 2019-04-30 0:25     Writer: inactive

Hi giffinr

I do not know what it means to be moving very slowly. Please upload it as a video.

 

Leo

Maxst Support Team

Posted Date: 2019-04-30 13:09     Edited Date: 2019-04-30 13:09     Writer: inactive

Hi Leo

I've now created a very simple version of the "Image Tracking" sample unity app.

All I've changed is

- Uploaded my image tracking file (The only image being tracked is the 'front of the cube' you can see in the video.)

- Added UI buttons for Jitter On / Jitter Off

You can see in the video I start with Jitter Off, then switch Jitter On half way through.  So you can see the different behaviour of the model.  With Jitter On the model it's moving too slowly to keep up with the cube movements.

Would be great to know how I could implement my own jitter control so I can control the effects on the speed the image tracking reacts to movement.  Or to have a controllable jitter strength setting.

https://www.youtube.com/watch?v=s1CqsACfeoc

Regards

Rob.

 

Posted Date: 2019-05-01 8:55     Edited Date: 2019-05-01 8:55     Writer: inactive

Hi Leo

I think I’ve found a solution which would allow me to implement my own jitter control (using a low pass moving average filter), I’ve not yet tested it but the example code in the last solution looks to be exactly what I need.

https://answers.unity.com/questions/865817/how-to-implement-a-low-pass-filter-for-acceleromet.html

It would still be helpful to know if I can alter the strength of your existing jitter control, but if this isn’t possible I’ll try using this solution instead.

Thanks Rob