settingContentAverageLightLevel(_:)

Create an image by changing the receiver’s contentAverageLightLevel property.

Declaration

func settingContentAverageLightLevel(_ average: Float) -> CIImage

An autoreleased CIImage.

Changing this value will alter the behavior of the CIToneMapHeadroom and CISystemToneMap filters.

If the value is set to 0.0 or less then the returned image’s contentAverageLightLevel is unknown.