import type { OrientedFastKeypoint } from '../getOrientedFastKeypoints.js';
export type DistanceMatrix = Float64Array[];
/**
 * Find all keypoints within radius from the current keypoint.
 * @param keypoints - Keypoints to process.
 * @param radius - Radius in which the surrounding keypoints should be.
 * @returns Array of keypoints within radius for each of the keypoints.
 */
export declare function getKeypointsInRadius(keypoints: OrientedFastKeypoint[], radius: number): number[][];
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