---
title: bias
framework: coreimage
role: symbol
role_heading: Instance Property
path: coreimage/ciconvolution/bias
---

# bias

A value that’s added to each output pixel.

## Declaration

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

## See Also

### Instance Properties

- [inputImage](coreimage/ciconvolution/inputimage.md)
- [weights](coreimage/ciconvolution/weights.md)