import type { Image } from '../Image.js';
export interface IncreaseContrastOptions {
    /**
     * Image to which to output.
     */
    out?: Image;
    /**
     * Level all channels uniformly in order to preserve the color balance.
     * @default false
     */
    uniform?: boolean;
}
/**
 * Increase the contrast of an image by spanning each channel on the range [0, image.maxValue].
 * This algorithm is based on the level algorithm.
 * @param image - The image to enhance.
 * @param options - Increase contrast options.
 * @returns The enhanced image.
 */
export declare function increaseContrast(image: Image, options?: IncreaseContrastOptions): Image;
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