---
title: VNDetectedObjectObservation
framework: vision
role: symbol
role_heading: Class
path: vision/vndetectedobjectobservation
---

# VNDetectedObjectObservation

An observation that provides the position and extent of an image feature that an image- analysis request detects.

## Declaration

```swift
class VNDetectedObjectObservation
```

## Overview

Overview This class is the observation type that VNTrackObjectRequest generates. It represents an object that the Vision request detects and tracks.

## Topics

### Creating an Observation

- [init(boundingBox:)](vision/vndetectedobjectobservation/init(boundingbox:).md)
- [init(requestRevision:boundingBox:)](vision/vndetectedobjectobservation/init(requestrevision:boundingbox:).md)

### Locating a Detected Object

- [boundingBox](vision/vndetectedobjectobservation/boundingbox.md)

### Accessing an Image Mask

- [globalSegmentationMask](vision/vndetectedobjectobservation/globalsegmentationmask.md)

## Relationships

### Inherits From

- [VNObservation](vision/vnobservation.md)

### Inherited By

- [VNFaceObservation](vision/vnfaceobservation.md)
- [VNHumanObservation](vision/vnhumanobservation.md)
- [VNRecognizedObjectObservation](vision/vnrecognizedobjectobservation.md)
- [VNRectangleObservation](vision/vnrectangleobservation.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)
- [VNRequestRevisionProviding](vision/vnrequestrevisionproviding.md)

## See Also

### Object tracking

- [Tracking the User’s Face in Real Time](vision/tracking-the-user-s-face-in-real-time.md)
- [Tracking Multiple Objects or Rectangles in Video](vision/tracking-multiple-objects-or-rectangles-in-video.md)
- [VNTrackingRequest](vision/vntrackingrequest.md)
- [VNTrackRectangleRequest](vision/vntrackrectanglerequest.md)
- [VNTrackObjectRequest](vision/vntrackobjectrequest.md)