---
title: "ClikaRT::nn::InstanceNormOptions"
sidebar_label: "InstanceNormOptions"
description: "Construction settings of InstanceNorm beyond the channel count (a plain aggregate; assign the fields you need)."
---

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<span class="api-kind api-kind--struct">struct</span>

**Header:** `ClikaRT/nn/instance_norm.h`

Construction settings of [`InstanceNorm`](./InstanceNorm.md) beyond the channel count (a plain aggregate; assign the fields you need).

## Data members

### eps {#eps}

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`double` **`eps`** `= 1e-5`

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Added to the variance before the square root. Default `1e-5`.

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Declared in `ClikaRT/nn/instance_norm.h`, line 50

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### affine {#affine}

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`bool` **`affine`** `= false`

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Declares the per-channel `weight` (scale) and `bias` (shift) parameters. Default `false`.

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Declared in `ClikaRT/nn/instance_norm.h`, line 53

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### track\_running\_stats {#track_running_stats}

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`bool` **`track_running_stats`** `= false`

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Declares the `running_mean` / `running_var` buffers; when bound they replace the per-instance statistics. Default `false`.

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Declared in `ClikaRT/nn/instance_norm.h`, line 56

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### activation {#activation}

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`std::optional<`[`ops::Activation`](../ops/index.md#Activation)`>` **`activation`**

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A fused activation applied to the normalized result; absent applies none.

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Declared in `ClikaRT/nn/instance_norm.h`, line 59

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### dtype {#dtype}

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[`DataType`](../../index.md#DataType) **`dtype`** `=` [`DataType::Float32`](../../index.md#DataType)

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The dtype the declared slots carry; a bound payload casts to it. Default `Float32`.

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Declared in `ClikaRT/nn/instance_norm.h`, line 62

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### device {#device}

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[`Device`](../Device.md) **`device`** `=` [`Device::cpu`](../Device.md#cpu)`()`

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The placement of the declared slots. Default cpu.

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Declared in `ClikaRT/nn/instance_norm.h`, line 64

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