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# minimumComponent()

Creates a minimum RGB grayscale image.

```
class func minimumComponent() -> any CIFilter & CIMinimumComponent
```

## Return Value

The modified image.

## Discussion

This method applies the minimum component filter to an image. The effect applies a preconfigured set of effects that result in the input image becoming grayscale using the minimum RGB color components.

The minimum component filter uses the following property:

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

The following code creates a filter that adds darkness and makes the input image grayscale:

```swift
func minimumComponent(inputImage: CIImage) -> CIImage {
    let minimumComponentFilter = CIFilter.minimumComponent()
    minimumComponentFilter.inputImage = inputImage
    return minimumComponentFilter.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, a minimum component filter is applied, transforming the colors in the image to be grayscale with darker contrast.](images/com.apple.coreimage/media-3545011@2x.png)

---

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