import { YuvFrame } from './frame';
/**
 * Bilinear resize grayscale image. Target dimension is w * h.
 *
 * w * h cannot be zero.
 *
 * @param w
 *            New width.
 * @param h
 *            New height. Optional, calculated to preserve frame aspect ratio if not given.
 */
export declare function scaleBilinear(w: number, h?: number): (frame: YuvFrame) => YuvFrame;