The class of the input parameter for a filter. If you are writing an image unit (see Image Unit Tutorial), Core Image supports only these classes for nonexecutable image units: CIColor, CIVector, CIImage, and NSNumber only. Executable image units may have input parameters of any class, but Core Image does not generate an automatic user interface for custom classes (see CIFilter(IKFilterUIAddition)).
Available in Mac OS X v10.4 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)