Log in or register to post comments

Two ImageTargets - only one can be in focus

August 20, 2019 - 7:11am #1

Dear all, sorry for a novice question, I’ve started fiddling with Vuforia&Unity AR content recently. Also, sort if here is a similar or same topic, I’ve tried to find it, but I was not so successful.

Here is the thing:

I have 2 Image Targets (images of real paintings in museum) that are close to each other and could be recognized at the same time on mobile phone. When image targets are being recognized, certain mp4 video&audio file is being played. The problem is that with 2 image targets being recognized at the same time, I’ve got 2 mp4 video&audio files being placed at the same time, which is confusing for the visitor of the museum.

Question would be: how to focus/recognize/activate only the closest image target thus playing only one mp4 video&audio file which is tied to that image target? 

Thanks in advance

Two ImageTargets - only one can be in focus

September 24, 2019 - 11:29am #3

Yes, thanks a lot for help, since it solved the case :) Initially I had Max Simultaneous Tracked Images set to 2 and when I set it back to 1, I got the desired outcome :) Thanks again! Cheers

Two ImageTargets - only one can be in focus

August 26, 2019 - 11:22am #2


In my opinion, the first problem is disambiguation of the targets recognized. It would be interesting to see the two (2) similar paintings to see if some creative post-processing can be used to help the Vuforia Engine SDK uniquely detect each.

If you don't need simultaneous detection and tracking of multiple targets, you can limit Vuforia Engine SDK to only detect/track a single target at a time. There are two ways to adjust the number of simultaneously tracked Image Targets and/or Object Targets:

The only limitation with the above is that it does not address the target disambiguation. For example, even if you limit detection to a single target, the fact that the SDK may detect painting #2 as painting #1 will not help as the SDK could detect the first target as the wrong painting. Removing the target disambiguation at the app level would also require additional UX.


Vuforia Engine Support

Log in or register to post comments