---
title: nrNoiseLevel
framework: coreimage
role: symbol
role_heading: Instance Property
path: coreimage/cilineoverlay/nrnoiselevel
---

# nrNoiseLevel

The noise level of the image, used with camera data, that’s removed before tracing the edges of the image.

## Declaration

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

## Discussion

Discussion Increasing the noise level helps to clean up the traced edges of the image.

## See Also

### Instance Properties

- [nrSharpness](coreimage/cilineoverlay/nrsharpness.md)
- [contrast](coreimage/cilineoverlay/contrast.md)
- [edgeIntensity](coreimage/cilineoverlay/edgeintensity.md)
- [inputImage](coreimage/cilineoverlay/inputimage.md)
- [threshold](coreimage/cilineoverlay/threshold.md)