Firebase Docs Reference FirebaseMLVision Framework Reference FIRVisionImageMetadata @interface FIRVisionImageMetadata : NSObject Metadata of an image used in feature detection. orientation The display orientation of the image. Defaults to .topLeft. Declaration Objective-C @property (assign, readwrite, nonatomic) FIRVisionDetectorImageOrientation orientation; Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated June 20, 2018.