# ObjectDetectionAnnotation An object detection annotation. ``` struct ObjectDetectionAnnotation where Label : Comparable, Label : Decodable, Label : Encodable, Label : Hashable ``` ## Overview The annotation consists of a list of bounding boxes and object labels for each image. ## Topics ### Getting the properties [`let imageFileName: String`](/documentation/CreateMLComponents/ObjectDetectionAnnotation/imageFileName) The name of the image file. [`let objects: [ObjectDetectionAnnotation.Annotation]`](/documentation/CreateMLComponents/ObjectDetectionAnnotation/objects) The list of object annotations in the image. [`struct Annotation`](/documentation/CreateMLComponents/ObjectDetectionAnnotation/Annotation) The annotation represented by an object label and its bounding box. [`let prominentObject: Label`](/documentation/CreateMLComponents/ObjectDetectionAnnotation/prominentObject) The most prominent object in the image. ### Encoding and decoding [`enum CodingKeys`](/documentation/CreateMLComponents/ObjectDetectionAnnotation/CodingKeys) Coding keys for object detection annotations ### Default Implementations [Identifiable Implementations](/documentation/CreateMLComponents/ObjectDetectionAnnotation/Identifiable-Implementations) ## Relationships ### Conforms To [`Decodable`](/documentation/Swift/Decodable) [`Copyable`](/documentation/Swift/Copyable) [`Identifiable`](/documentation/Swift/Identifiable) [`Equatable`](/documentation/Swift/Equatable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Escapable`](/documentation/Swift/Escapable) [`Sendable`](/documentation/Swift/Sendable) --- 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)