Images & Objects Tracking

Cloud Recognition

What is a Vuforia Cloud Database?

A Cloud Database is a set of Image Targets stored on a server and queried when you want to detect and track thousands of images. Use the Target Manager to create a Cloud Database.

Which Vuforia targets does Cloud Recognition support?

Currently, Cloud Recognition only supports Image Targets. If you need other targets, please let us know in our issue-only GitHub repository

What license should I get to use Cloud Recognition?

You can use Cloud Recognition with either a Basic or Premium license. Both plans cover up to 1000 recos per month. You can purchase a Cloud Add-on in the developer portal if you need more.

What is a “reco”?

A “reco" occurs when your app recognizes a target in your Cloud Database.

What is a monthly reco usage?

A monthly reco usage refers to the total number of recos for all users of your app included in a particular plan.

Where can I see my monthly reco usage?

You can see the monthly reco usage data in the License Manager.

How does the cloud reco counting work?

We have an article specifically covering this topic: Counting Cloud Reco Events.

Image Targets, Cylinder Targets, and Multi Targets 

Can a Multi Target have more than six sides? 

Yes, altering the Multi Target database to have additional or fewer sides is possible as long as its sides can form a package. These are the steps: 

  1. Create a new Device Database in the Target Manager. 
  2. Upload all images to be included in the Multi Target as single Image Targets (with correct size values). 
  3. Select all images in the Target Manager and download the device database (non-Unity Editor packaging). 
  4. Open and edit the XML file to create the custom Multi Target.  

To utilize this Device Database in the Unity Editor, you will need to take the following additional steps: 

  1. Copy the modified XML and DAT files into the Assets/StreamingAssets/Vuforia folder in your Unity project.

 

You can now select the customized Device Database from the Inspector window, but you will not see any preview images (as the Target Manager typically packages them in the Unity Asset Package file).

Can I create custom Multi Targets? 

Yes, if the image files’ widths and lengths match the aspect ratios defined in the Target Manager’s cuboid setup.  

For example, if Width=X meters, Height=Y meters, and Length=Z meters, the aspect ratios must be: 

  • Front & back images -> X:Y (i.e., W:H) 
  • Left & right side-images -> Z:Y (i.e., L:H) 
  • Top & bottom images -> X:Z (i.e., W:L) 

How can I reduce jitter on the augmentations that are tracked with planar targets? 

Jitter is most common with wrongly scaled targets. We recommend always keeping an exact aspect ratio between the physical and uploaded targets.  

Enable Extended Tracking and Pose Smoothing to reduce the chances of jittering content when the target is moved, occluded, or out of camera view.  

VuMarks

How many Instances can I create from a VuMark template?

The VuMark’s ID length defines the number of instances. See VuMarks in Adobe Illustrator for more information.

Instances can be downloaded from the Vuforia Developer Portal via the Target Manager. You can also use the Vuforia Web Services APIs for generating VuMark instances.

Model Targets

Can I use a custom Guide View instead of the default one?

Yes, you can create custom Guide Views and replace the default ones rendered by Vuforia Engine. There is a field in the Model Targets game object Inspector window in Unity called "Custom 2D GuideView Image" where you can set a custom texture.

How many Guide Views can a single Model Target have?

For Model Targets, you can set up as many Guide Views as needed. But consider that the Guide Views should be distinguishable for Vuforia Engine to tell the Guide Views apart. See more information in the Guide View article and their snapping range.

Guide Views are not required for Advanced Model Targets. Instead, you will set up Advanced Views in the MTG (Model Target Generator). You can have as many Advanced Views as necessary, but each will increase training time.

How do I copy Model Target Generator projects between work environments?

An MTG project file is stored as a JSON file. Copy the parent folder and its contents between work environments. On the MTG home screen, click Open Model Target and navigate to the JSON file.

How many Model Targets can there be in a database?

We recommend not exceeding 20 Model Targets per database. In addition, only Advanced Model Target databases (trained databases) can have more than one Model Target. There can be any number of Guide Views or Advanced Views for each Model Target in such a database.

Why am I having connection issues?

If you are facing connection issues or receiving a ‘Service is not available. Please try again later.’ when using the desktop MTG application in your enterprise environment, please see Vuforia Engine Cloud Security for firewall settings.

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