---
title: lumaSigma
framework: coreimage
role: symbol
role_heading: Instance Property
path: coreimage/ciedgepreserveupsample/lumasigma
---

# lumaSigma

A value that specifies the influence of the input image’s luma information on the upsampling operation.

## Declaration

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

## See Also

### Instance Properties

- [inputImage](coreimage/ciedgepreserveupsample/inputimage.md)
- [smallImage](coreimage/ciedgepreserveupsample/smallimage.md)
- [spatialSigma](coreimage/ciedgepreserveupsample/spatialsigma.md)