---
title: VisionObservation
framework: vision
role: symbol
role_heading: Protocol
path: vision/visionobservation
---

# VisionObservation

A type for objects produced by image-analysis requests.

## Declaration

```swift
protocol VisionObservation : CustomStringConvertible, Decodable, Encodable, Hashable, Sendable
```

## Topics

### Inspecting an observation

- [uuid](vision/visionobservation/uuid.md)
- [confidence](vision/visionobservation/confidence.md)
- [description](vision/visionobservation/description.md)
- [originatingRequestDescriptor](vision/visionobservation/originatingrequestdescriptor.md)
- [RequestDescriptor](vision/requestdescriptor.md)
- [timeRange](vision/visionobservation/timerange.md)

### Hashing the observation

- [hash(into:)](vision/visionobservation/hash(into:).md)

### Default Implementations

- [Hashable Implementations](vision/visionobservation/hashable-implementations.md)

## Relationships

### Inherits From

- [CustomStringConvertible](swift/customstringconvertible.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

### Conforming Types

- [AnimalBodyPoseObservation](vision/animalbodyposeobservation.md)
- [BarcodeObservation](vision/barcodeobservation.md)
- [ClassificationObservation](vision/classificationobservation.md)
- [ContoursObservation](vision/contoursobservation.md)
- [CoreMLFeatureValueObservation](vision/coremlfeaturevalueobservation.md)
- [DetectedDocumentObservation](vision/detecteddocumentobservation.md)
- [DetectedObjectObservation](vision/detectedobjectobservation.md)
- [DocumentObservation](vision/documentobservation.md)
- [FaceObservation](vision/faceobservation.md)
- [FeaturePrintObservation](vision/featureprintobservation.md)
- [HorizonObservation](vision/horizonobservation.md)
- [HumanBodyPose3DObservation](vision/humanbodypose3dobservation.md)
- [HumanBodyPoseObservation](vision/humanbodyposeobservation.md)
- [HumanHandPoseObservation](vision/humanhandposeobservation.md)
- [HumanObservation](vision/humanobservation.md)
- [ImageAestheticsScoresObservation](vision/imageaestheticsscoresobservation.md)
- [ImageHomographicAlignmentObservation](vision/imagehomographicalignmentobservation.md)
- [ImageTranslationAlignmentObservation](vision/imagetranslationalignmentobservation.md)
- [InstanceMaskObservation](vision/instancemaskobservation.md)
- [OpticalFlowObservation](vision/opticalflowobservation.md)
- [PixelBufferObservation](vision/pixelbufferobservation.md)
- [RecognizedObjectObservation](vision/recognizedobjectobservation.md)
- [RecognizedTextObservation](vision/recognizedtextobservation.md)
- [RectangleObservation](vision/rectangleobservation.md)
- [SaliencyImageObservation](vision/saliencyimageobservation.md)
- [SmudgeObservation](vision/smudgeobservation.md)
- [TextObservation](vision/textobservation.md)
- [TrajectoryObservation](vision/trajectoryobservation.md)

## See Also

### Protocols

- [ImageProcessingRequest](vision/imageprocessingrequest.md)
- [PoseProviding](vision/poseproviding.md)
- [StatefulRequest](vision/statefulrequest.md)
- [TargetedRequest](vision/targetedrequest.md)
- [VisionRequest](vision/visionrequest.md)