---
title: headIndex
framework: coreimage
role: symbol
role_heading: Instance Property
path: coreimage/cicoremlmodel/headindex
---

# headIndex

A number that specifies which output of a multihead Core ML model applies the effect on the image.

## Declaration

```swift
var headIndex: Float { get set }
```

## See Also

### Instance Properties

- [inputImage](coreimage/cicoremlmodel/inputimage.md)
- [model](coreimage/cicoremlmodel/model.md)
- [softmaxNormalization](coreimage/cicoremlmodel/softmaxnormalization.md)