# referenceImages(inGroupNamed:bundle:) Loads all reference images in the specified AR Resource Group in your Xcode project’s asset catalog. ``` class func referenceImages(inGroupNamed name: String, bundle: Bundle?) -> Set? ``` ## Parameters `name` The name of an AR Resource Group from your Xcode project’s main asset catalog. `bundle` The bundle from which to load asset catalog resources, or `nil` to use your app’s main bundle. ## Return Value A set of all unique reference images in the specified group. ## Discussion To use the images for image detection in a world-tracking AR session, provide this set for your session configuration’s [`detectionImages`](/documentation/ARKit/ARWorldTrackingConfiguration/detectionImages) property. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)