Module Lut

type t = int array
val identity : t
val invert : t
val posterize : int -> t
val brightness_contrast : brightness:int -> contrast:int -> t
val levels : black:int -> white:int -> gamma:float -> t
val curves : (int * int) list -> t
val compose : t -> t -> t
val apply : t -> Pixels.image -> Pixels.image
val apply_rgb : t -> t -> t -> Pixels.image -> Pixels.image
val threshold : int -> Pixels.image -> Pixels.image
val desaturate : Pixels.image -> Pixels.image