Filters.swift

enum FilterType : String {
    case Mono = "CIPhotoEffectMono"
    case MonoChrome = "CIColorMonochrome"
    case Noir = "CIPhotoEffectNoir"
    case Tonal = "CIPhotoEffectTonal"
    case Sharpen = "CIUnsharpMask"
    case Blur = "CIGaussianBlur"
    case Pixelate = "CIPixellate"
    case Edges = "CIEdges"
    case Negative = "CIColorInvert"
    case Posterize = "CIColorPosterize"
    case NoiseReduction = "CINoiseReduction"
}