---
title: lineScreen()
framework: coreimage
role: symbol
role_heading: Type Method
path: coreimage/cifilter-swift.class/linescreen()
---

# lineScreen()

Creates a monochrome image with a series of small lines to add detail.

## Declaration

```swift
class func lineScreen() -> any CIFilter & CILineScreen
```

## Return Value

Return Value The modified image.

## Discussion

Discussion This method applies a line screen filter to an image. The effect generates a monochrome image containing a series of lines creating detail. The halftone effect is a set of lines, dots, or circles that contain detail. When viewing the image from a distance, the markings blend together, creating the illusion of continuous lines and shapes. Print media commonly uses this effect. The line screen filter uses the following properties: The following code creates a filter that creates a monochrome image containing small lines of detail on a black background: func line(inputImage: CIImage) -> CIImage {     let lineScreen = CIFilter.lineScreen()     lineScreen.inputImage = inputImage     lineScreen.center = CGPoint(x: 2016, y: 1512)     lineScreen.angle = 1     lineScreen.width = 35     lineScreen.sharpness = 0.7     return lineScreen.outputImage! }

## See Also

### Filters

- [circularScreen()](coreimage/cifilter-swift.class/circularscreen().md)
- [cmykHalftone()](coreimage/cifilter-swift.class/cmykhalftone().md)
- [dotScreen()](coreimage/cifilter-swift.class/dotscreen().md)
- [hatchedScreen()](coreimage/cifilter-swift.class/hatchedscreen().md)