import { Hasher } from "./types.js";
/** difference hash */
export declare const dHash: Hasher;
/** average hash */
export declare const aHash: Hasher;
/** median hash */
export declare const mHash: Hasher;
/**
 * block hash
 *
 * By default, it uses "BT601" for gray-scaling, and uses horizontal bands with 2 pixels height.
 *
 * With `classic` option — "original-like" block hash that uses "average" for gray-scaling,
 * and uses 4 horizontal bands total.
 * */
export declare const bHash: Hasher;