/**
 * @license
 * Copyright 2021 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
import type { Keypoint } from '@tensorflow-models/hand-pose-detection';
/**
 * MediaPipe Hands connections between the 21 keypoints.
 * Each tuple is [startIdx, endIdx].
 *
 * Keypoint indices:
 *  0 = wrist
 *  1-4 = thumb (cmc, mcp, ip, tip)
 *  5-8 = index finger (mcp, pip, dip, tip)
 *  9-12 = middle finger (mcp, pip, dip, tip)
 * 13-16 = ring finger (mcp, pip, dip, tip)
 * 17-20 = pinky (mcp, pip, dip, tip)
 */
export declare const HAND_CONNECTIONS: [number, number][];
/**
 * Draw a single keypoint dot on the canvas.
 */
export declare function drawHandPoint(ctx: CanvasRenderingContext2D, x: number, y: number, radius?: number, fillColor?: string, strokeColor?: string): void;
/**
 * Draw all 21 hand keypoints onto a canvas.
 * @param keypoints Array of 21 keypoints from hand-pose-detection
 * @param ctx Canvas 2D rendering context
 * @param minScore Minimum score to render a keypoint (defaults to 0)
 * @param scale Optional scale factor for coordinates
 */
export declare function drawHandKeypoints(keypoints: Keypoint[], ctx: CanvasRenderingContext2D, minScore?: number, keypointSize?: number, fillColor?: string, strokeColor?: string, scale?: number, autoSize?: boolean): void;
/**
 * Draw the hand skeleton (connections between keypoints) onto a canvas.
 * @param keypoints Array of 21 keypoints from hand-pose-detection
 * @param ctx Canvas 2D rendering context
 * @param scale Optional scale factor for coordinates
 */
export declare function drawHandSkeleton(keypoints: Keypoint[], ctx: CanvasRenderingContext2D, lineWidth?: number, strokeColor?: string, scale?: number): void;