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# gloom()

Adjusts an image’s color by applying a gloom filter.

```
class func gloom() -> any CIFilter & CIGloom
```

## Return Value

The modified image.

## Discussion

This method applies the gloom filter to an image. The effect reduces the highlights of the image resulting in the image looking dull.

The gloom filter uses the following properties:

- `inputImage`: An image with the type [`CIImage`](/documentation/CoreImage/CIImage).
- radius: A `float` representing the area of effect as an <doc://com.apple.documentation/documentation/Foundation/NSNumber>.
- intensity: A `float` representing the desired strength of the effect as an <doc://com.apple.documentation/documentation/Foundation/NSNumber>.

The following code creates a filter that results in a darker image with a slight blur:

```swift
func gloom(inputImage: CIImage) -> CIImage {
    let gloomFilter = CIFilter.gloom()
    gloomFilter.inputImage = inputImage
    gloomFilter.radius = 3
    gloomFilter.intensity = 10
    return gloomFilter.outputImage!
}
```

![Two pictures of a pink flower surrounded by foliage. The photo on the left shows a single flower photographed close up, in focus, with good light and no effects. In the photo on the right, the gloom filter is applied, resulting in the foliage in the background becoming darker and the image having a slight blur.](images/com.apple.coreimage/media-3599998@2x.png)

---

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