/// <reference types="node" />
/**
 * Represents the dimensions of an image (width and height) in pixels.
 */
export interface Dimensions {
    /**
     * The width of this image in pixels.
     */
    width: number;
    /**
     * The height of this image in pixels.
     */
    height: number;
}
/**
 * A diffable image with a width and a height as well as a buffer containing the data.
 * The data must be in RGB or RGBA format.
 */
export interface DiffImage extends Dimensions {
    /**
     * A node buffer containing the image information in RGB or RGBA format.
     */
    data: Buffer;
}
/**
 * The result of diffing two images.
 */
export interface DiffResult {
    /**
     * The amount of pixels that didn't match.
     */
    pixels: number;
    /**
     * The output image visually representing the difference between two images.
     */
    image?: DiffImage;
    /**
     * A relative number which grows from `0` the higher the total difference between both images was.
     * This also takes the color differences between individual pixels into account.
     */
    totalDelta: number;
}
export interface DiffImagesArguments {
    /**
     * The first image to compare.
     */
    image1: DiffImage;
    /**
     * The second image to compare.
     */
    image2: DiffImage;
    /**
     * A threshold of perceived color difference between two pixels. Ranging from `0` to `1`
     * with `0` being the most sensitive and `1` ignoring basically any difference between two pixels.
     * This threshold is applied to each pixel. Defaults to `0.1`.
     */
    colorThreshold?: number;
    /**
     * Whether to attempt to detect antialiasing when comparing the images. Defaults to `true`.
     */
    detectAntialiasing?: boolean;
    /**
     * If set to `false` no image visualizing the difference is generated.
     */
    generateDiffImage?: boolean;
}
export declare function diffImages(args: DiffImagesArguments): DiffResult;
export declare function diffImages(image1: DiffImage, image2: DiffImage): DiffResult;