import type { Image } from '../Image.js';
/**
 * Compute the Peak signal-to-noise ratio (PSNR) between two images.
 * The larger the PSNR, the more similar the images.
 * @see {@link https://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio}
 * @param image - First image.
 * @param otherImage - Second image.
 * @returns PSNR of the two images in decibels.
 */
export declare function computePsnr(image: Image, otherImage: Image): number;
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