import type { FastKeypoint } from '../keypoints/getFastKeypoints.js';
/**
 * Scales the coordinates of the keypoints.
 * @param keypoints - Keypoints to scale.
 * @param scale - Scalar by which to multiply the coordinates.
 * @returns Scaled keypoints (copy of the original array).
 */
export declare function scaleKeypoints(keypoints: FastKeypoint[], scale: number): FastKeypoint[];
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