@class CIImage, CIVector, NSNumber; @interface CIPerspectiveCorrection : CIFilter @property (retain, nonatomic) CIImage *inputImage; @property (retain, nonatomic) CIVector *inputTopLeft; @property (retain, nonatomic) CIVector *inputTopRight; @property (retain, nonatomic) CIVector *inputBottomRight; @property (retain, nonatomic) CIVector *inputBottomLeft; @property (retain, nonatomic) NSNumber *inputCrop; + (id)customAttributes; - (id)_kernel; - (id)outputImage; @end