<!--
{
  "availability" : [
    "*: -",
    "iOS: 14.0.0 -",
    "iPadOS: 14.0.0 -",
    "macCatalyst: -",
    "macOS: 11.0.0 -",
    "tvOS: 14.0.0 -",
    "visionOS: -",
    "watchOS: 7.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Accelerate",
  "identifier" : "/documentation/Accelerate/BNNS/NormalizationType",
  "metadataVersion" : "0.1.0",
  "role" : "Enumeration",
  "symbol" : {
    "kind" : "Enumeration",
    "modules" : [
      "Accelerate"
    ],
    "preciseIdentifier" : "s:10Accelerate4BNNSO17NormalizationTypeO"
  },
  "title" : "BNNS.NormalizationType"
}
-->

# BNNS.NormalizationType

Constants that describe normalization types.

```
enum NormalizationType
```

## Topics

### Normalization Types

[`case batch(movingMean: BNNSNDArrayDescriptor?, movingVariance: BNNSNDArrayDescriptor?)`](/documentation/Accelerate/BNNS/NormalizationType/batch(movingMean:movingVariance:))

Batch normalization with optional moving averages.

[`case group(groupCount: Int)`](/documentation/Accelerate/BNNS/NormalizationType/group(groupCount:))

Group normalization.

[`case instance(movingMean: BNNSNDArrayDescriptor?, movingVariance: BNNSNDArrayDescriptor?)`](/documentation/Accelerate/BNNS/NormalizationType/instance(movingMean:movingVariance:))

Instance normalization with optional moving averages.

[`case layer(normalizationAxis: Int)`](/documentation/Accelerate/BNNS/NormalizationType/layer(normalizationAxis:))

Layer normalization.


---

Copyright &copy; 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)