Hi,

Pose jitter exists for all 2D planar targets. The magnitude of the jitter (hardly noticeable to very noticeable) can be impacted by a few factors: (In addition to what I mentioned in the other post)

• Image Targets must be flat when in the camera's field of view
• Not enough lighting upon, and/or spectral reflections occluding the Image Target
• The entire target image is not in the camera's field of view. As Image Targets extract feature points from the target in real time (on a frame-by-frame basis), the more feature points the better the quality of the tracking experience. In most cases, this can be improved by enabling the Device Tracker (aka Extended Tracking): Unity Editor->Window->Vuforia Configuration->Device Tracker->Track Device Pose (box checked).
• For additional tips for optimizing 2D planar targets, please see the following guide: https://library.stage.vuforia.com/articles/Solution/Optimizing-Target-Detection-and-Tracking-Stability

Thank you.

Vuforia Engine Support

Hello, I am doing all that already, but I noticed that in the latest version of Vuforia, my positioned objects are shaking wildly while the target is visible. After not being able to see the target image any more the extended tracking is very stable. What gives?

Hi,

Activating the device tracker makes the IT more sensitive to wrongly specified target sizes.

Please check below:

1. Always print the image that was uploaded to the portal to the exact same aspect ratio. Any stretching or altering of the image may cause tracking pose jitter. Some printers default to "stretch to fit", which can change the aspect ratio.

2. Check the size values you are using when uploading Targets to the Vuforia Target Manager. Note there is specific language used in the dialogue box that says Vuforia uses meters as the default unit scale. Incorrect target sizes could affect either our detection/tracking algorithm

Thank you.

Vuforia Engine Support