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linearBurnBlendMode()

Blends color from two images while increasing contrast.

Declaration

class func linearBurnBlendMode() -> any CIFilter & CICompositeOperation

Return Value

The modified image.

Discussion

This method applies the linear-burn blend mode filter to an image. The effect calculates the brightness value for the background image then darkens it to reflect the brightness of the input image. The effect then decreases the contrast in the output image.

The linear-burn blend mode filter uses the following properties:

inputImage

An image with the type CIImage.

backgroundImage

An image with the type CIImage.

The following code creates a filter that results in an output image that’s much darker with very little visible detail:

func linearBurnBlendMode(inputImage: CIImage, backgroundImage: CIImage) -> CIImage {
    let colorBlendFilter = CIFilter.linearBurnBlendMode()
    colorBlendFilter.inputImage = inputImage
    colorBlendFilter.backgroundImage = backgroundImage
    return colorBlendFilter.outputImage!
}

[Image]

See Also

Filters