# init(_:physicalSize:) Creates the image anchoring source from image file URL. ``` init(_ url: URL, physicalSize: SIMD2) ``` ## Parameters `url` The image file URL. `physicalSize` The physical size of tracking image --- 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)