---
title: BNNSDataLayoutConvolutionWeightsOIHW
framework: accelerate
role: symbol
role_heading: Global Variable
path: accelerate/bnnsdatalayoutconvolutionweightsoihw
---

# BNNSDataLayoutConvolutionWeightsOIHW

A constant that represents a 4D array of convolution weights.

## Declaration

```swift
var BNNSDataLayoutConvolutionWeightsOIHW: BNNSDataLayout { get }
```

## Discussion

Discussion The value (kx ,ky, InChannel, OutChannel) is at index: kx * stride[0] + ky * stride[1] + InChannel * stride[2] + OutChannel * stride[3]. size[0] is the convolution kernel width in pixels. size[1] is the convolution kernel height in pixels. size[2] is the number of input channels. size[3] is the number of output channels.

## See Also

### 4D Data Layouts

- [BNNSDataLayoutConvolutionWeightsIOHrWr](accelerate/bnnsdatalayoutconvolutionweightsiohrwr.md)
- [BNNSDataLayoutConvolutionWeightsOIHrWr](accelerate/bnnsdatalayoutconvolutionweightsoihrwr.md)
- [BNNSDataLayoutConvolutionWeightsOIHW_Pack32](accelerate/bnnsdatalayoutconvolutionweightsoihw_pack32.md)
- [BNNSDataLayout4DFirstMajor](accelerate/bnnsdatalayout4dfirstmajor.md)
- [BNNSDataLayout4DLastMajor](accelerate/bnnsdatalayout4dlastmajor.md)