Type Property

level

A key used to specify whether to return a filter that rotates the image to keep a level perspective.

Declaration

static let level: CIImageAutoAdjustmentOption

Discussion

The value associated with this key is a CFBoolean value. If true, Core Image analyzes the image to determine whether it would benefit from rotation—for example, a landscape photo in which the horizon is not horizontal—and returns a filter to perform that rotation. Supply false to indicate not to return a rotation filter. If you don’t specify this option, Core Image assumes its value is false.