import type * as tf_type from '@tensorflow/tfjs';
import { BoundingBox } from '../yolo-box/common';
export type Keypoint = {
    /** x of keypoint in px */
    x: number;
    /** y of keypoint in px */
    y: number;
    /** confidence of keypoint */
    visibility: number;
};
export type BoundingBoxWithKeypoints = BoundingBox & {
    keypoints: Keypoint[];
};
/**
 * output shape: [batch, box]
 *
 * Array of batches, each containing array of detected bounding boxes with keypoints
 * */
export type PoseResult = BoundingBoxWithKeypoints[][];
export type DecodePoseArgs = {
    /**
     * tensorflow runtime:
     * - browser: `import * as tf from '@tensorflow/tfjs'`
     * - nodejs: `import * as tf from '@tensorflow/tfjs-node'`
     */
    tf: typeof tf_type;
    /** e.g. `1` for single class */
    num_classes: number;
    /** e.g. `17` for 17 keypoints */
    num_keypoints: number;
    /** for each keypoints, are them {x,y} or {x,y,visibility} */
    visibility: boolean;
    /** batched predict result, e.g. 1x17x8400 */
    output: number[][][];
    /**
     * Number of boxes to return using non-max suppression.
     * If not provided, all boxes will be returned
     *
     * e.g. `1` for only selecting the bounding box with highest confidence.
     */
    maxOutputSize?: number;
    /**
     * the threshold for deciding whether boxes overlap too much with respect to IOU.
     *
     * default: `0.5`
     */
    iouThreshold?: number;
    /**
     * the threshold for deciding whether a box is a valid detection.
     *
     * default: `-Infinity`
     */
    scoreThreshold?: number;
};
/**
 * tensorflow output: [batch, features, instances]
 * features:
 * - 4: x, y, width, height
 * - num_classes: class confidence
 * - num_keypoints * 3: keypoint x, y, visibility
 *
 * e.g. 1x17x8400 for 1 batch of 8400 instances with 4 keypoints and 1 class
 * (17 = 4 + 1 + 4 * 3)
 *
 * The confidence are already normalized between 0 to 1.
 */
export declare function decodePose(args: DecodePoseArgs): Promise<PoseResult>;
/**
 * Sync version of `decodePose`.
 */
export declare function decodePoseSync(args: DecodePoseArgs): PoseResult;