export declare type Vec2 = [number, number];
export declare type CurvesOptions = {
    red: Vec2[];
    green?: Vec2[];
    blue?: Vec2[];
};
/**
 *
 * @param image
 * @param canvas
 * @param options A list of points that define the function for each channel.
 *              Each point is a list of two values: the value before the mapping
 *              and the value after the mapping, both in the range 0 to 1. For
 *              example, [[0,1], [1,0]] would invert the color channel while
 *              [[0,0], [1,1]] would leave the color channel unchanged. If green
 *              and blue are omitted then this argument also applies to the
 *              green and blue channels.
 */
export declare function curves(image: HTMLImageElement | HTMLCanvasElement, canvas: HTMLCanvasElement, options: CurvesOptions): void;
export default curves;