---
title: VNClassificationObservation
framework: vision
role: symbol
role_heading: Class
path: vision/vnclassificationobservation
---

# VNClassificationObservation

An object that represents classification information that an image-analysis request produces.

## Declaration

```swift
class VNClassificationObservation
```

## Overview

Overview This type of observation results from performing a VNCoreMLRequest image analysis with a Core ML model whose role is classification (rather than prediction or image-to-image processing). Vision infers that an MLModel object is a classifier model if that model predicts a single feature. That is, the model’s modelDescription object has a non-nil value for its predictedFeatureName property.

## Topics

### Determining Classification

- [identifier](vision/vnclassificationobservation/identifier.md)

### Measuring Confidence and Precision

- [hasPrecisionRecallCurve](vision/vnclassificationobservation/hasprecisionrecallcurve.md)
- [hasMinimumPrecision(_:forRecall:)](vision/vnclassificationobservation/hasminimumprecision(_:forrecall:).md)
- [hasMinimumRecall(_:forPrecision:)](vision/vnclassificationobservation/hasminimumrecall(_:forprecision:).md)

## Relationships

### Inherits From

- [VNObservation](vision/vnobservation.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

### Machine learning image analysis

- [Classifying Images with Vision and Core ML](coreml/classifying-images-with-vision-and-core-ml.md)
- [Training a Create ML Model to Classify Flowers](vision/training-a-create-ml-model-to-classify-flowers.md)
- [VNCoreMLRequest](vision/vncoremlrequest.md)
- [VNPixelBufferObservation](vision/vnpixelbufferobservation.md)
- [VNCoreMLFeatureValueObservation](vision/vncoremlfeaturevalueobservation.md)