---
title: MLImageClassifier.ModelParameters
framework: createml
role: symbol
role_heading: Structure
path: createml/mlimageclassifier/modelparameters-swift.struct
---

# MLImageClassifier.ModelParameters

Parameters that affect the process of training an image classifier model.

## Declaration

```swift
struct ModelParameters
```

## Overview

Overview Use this structure to configure the model training session. With it you can: Set a limit to the number of training iterations the session can use Provide your own validation dataset. See MLImageClassifier.ModelParameters.ValidationData. Enable specific image augmentations. See MLImageClassifier.ImageAugmentationOptions. Designate a custom feature extractor. See MLImageClassifier.FeatureExtractorType.custom(_:). Once you configure an MLImageClassifier.ModelParameters instance, use it to configure a training session with one of the applicable MLImageClassifier asynchronous type methods or synchronous initializers.

## Topics

### Creating parameters

- [init(validation:maxIterations:augmentation:algorithm:)](createml/mlimageclassifier/modelparameters-swift.struct/init(validation:maxiterations:augmentation:algorithm:).md)
- [init(featureExtractor:validation:maxIterations:augmentationOptions:)](createml/mlimageclassifier/modelparameters-swift.struct/init(featureextractor:validation:maxiterations:augmentationoptions:).md)
- [init(featureExtractor:validationData:maxIterations:augmentationOptions:)](createml/mlimageclassifier/modelparameters-swift.struct/init(featureextractor:validationdata:maxiterations:augmentationoptions:).md)
- [MLImageClassifier.ModelParameters.ClassifierType](createml/mlimageclassifier/modelparameters-swift.struct/classifiertype.md)
- [MLImageClassifier.ModelParameters.ModelAlgorithmType](createml/mlimageclassifier/modelparameters-swift.struct/modelalgorithmtype.md)

### Accessing the training parameters

- [algorithm](createml/mlimageclassifier/modelparameters-swift.struct/algorithm.md)
- [featureExtractor](createml/mlimageclassifier/modelparameters-swift.struct/featureextractor.md)
- [validation](createml/mlimageclassifier/modelparameters-swift.struct/validation.md)
- [maxIterations](createml/mlimageclassifier/modelparameters-swift.struct/maxiterations.md)
- [augmentationOptions](createml/mlimageclassifier/modelparameters-swift.struct/augmentationoptions.md)
- [validationData](createml/mlimageclassifier/modelparameters-swift.struct/validationdata-swift.property.md)

### Describing parameters

- [description](createml/mlimageclassifier/modelparameters-swift.struct/description.md)
- [debugDescription](createml/mlimageclassifier/modelparameters-swift.struct/debugdescription.md)
- [playgroundDescription](createml/mlimageclassifier/modelparameters-swift.struct/playgrounddescription.md)

### Supporting types

- [MLImageClassifier.FeatureExtractorType](createml/mlimageclassifier/featureextractortype.md)
- [MLImageClassifier.ModelParameters.ValidationData](createml/mlimageclassifier/modelparameters-swift.struct/validationdata-swift.enum.md)
- [MLImageClassifier.ImageAugmentationOptions](createml/mlimageclassifier/imageaugmentationoptions.md)

### Default Implementations

- [CustomDebugStringConvertible Implementations](createml/mlimageclassifier/modelparameters-swift.struct/customdebugstringconvertible-implementations.md)
- [CustomPlaygroundDisplayConvertible Implementations](createml/mlimageclassifier/modelparameters-swift.struct/customplaygrounddisplayconvertible-implementations.md)
- [CustomStringConvertible Implementations](createml/mlimageclassifier/modelparameters-swift.struct/customstringconvertible-implementations.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomPlaygroundDisplayConvertible](swift/customplaygrounddisplayconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Escapable](swift/escapable.md)

## See Also

### Supporting types

- [MLImageClassifier.DataSource](createml/mlimageclassifier/datasource.md)
- [MLImageClassifier.FeatureExtractorType](createml/mlimageclassifier/featureextractortype.md)
- [MLImageClassifier.CustomFeatureExtractor](createml/mlimageclassifier/customfeatureextractor.md)
- [MLImageClassifier.ImageAugmentationOptions](createml/mlimageclassifier/imageaugmentationoptions.md)