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  "title" : "screenBlendMode()"
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# screenBlendMode()

Blends colors of two images by multiplying colors.

```
class func screenBlendMode() -> any CIFilter & CICompositeOperation
```

## Return Value

The modified image.

## Discussion

This method applies the screen-blend mode filter to an image. The effect calculates the colors in the output image by multiplying the inverse color values for the input and background images, resulting in a brighter image.

The screen-blend mode filter uses the following properties:

- `inputImage`: An image with the type [`CIImage`](/documentation/CoreImage/CIImage).
- `backgroundImage`: An image with the type [`CIImage`](/documentation/CoreImage/CIImage).

The following code creates a filter that results in the image becoming lighter with colors from the input and background image:

```swift
func screenBlendMode(inputImage: CIImage, backgroundImage: CIImage) -> CIImage {
    let screenBlendMode = CIFilter.screenBlendMode()
    screenBlendMode.inputImage = inputImage
    screenBlendMode.backgroundImage = backgroundImage
    return screenBlendMode.outputImage!
}
```

![The image on the top left shows a beach with multiple palm trees and a rainbow arching across the blue sky.  The image below is a gradient image displaying a gradual color shift from purple to a dark orange. The image on the right shows the output from applying a screen-blend mode filter. The result displays a blend of the colors from the gradient and the beach rainbow photos, creating a brighter image. ](images/com.apple.coreimage/media-3546401@2x.png)

---

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