Simple target signs


#1

I am want to create something very simple. I have real signs in a public park. I have the sign images and can “train” them as targets. I would simply like when a target is “seen” to overlay one or more arrow overlays that point to objects in the camera view.

What is the best way to go about this? Thanks!


#2

Hi Mark,

Thanks for getting in touch.

There’s a few things to watch out for with the experience you’ve described:

  • A normal sign won’t provide sufficient contrast and detail to function as an effective tracking image, leading to jitter.

  • Using the signs as tracking images would require you to add zapcodes to the physical signs themselves.

  • Only one tracking image is recognised per experience, the app won’t be able to transition between displaying content from one tracking image to another. There is a possible workaround described in this thread, but it requires a substantial amount of coding.

  • Lastly, the Zappar app does not recognise and track real-world objects, so your on-screen arrows won’t necessarily point to the object you’d like, depending on the user’s position when scanning.

In regards to your ‘target being seen’ functionality, in Studio you can use a target image node’s ‘onseen’ script to define any actions that should occur when the target image comes into view.

Hope this helps, all the best.
Seb