hand detection works only with primary hand

Human Library

AI-powered 3D Face Detection & Rotation Tracking, Face Description & Recognition,
Body Pose Tracking, 3D Hand & Finger Tracking, Iris Analysis,
Age & Gender & Emotion Prediction, Gaze Tracking, Gesture Recognition, Body Segmentation

Highlights

Compatible with most server-side and client-side environments and frameworks
Combines multiple machine learning models which can be switched on-demand depending on the use-case
Related models are executed in an attention pipeline to provide details when needed
Optimized input pre-processing that can enhance image quality of any type of inputs
Detection of frame changes to trigger only required models for improved performance
Intelligent temporal interpolation to provide smooth results regardless of processing performance
Simple unified API
Built-in Image, Video and WebCam handling

Jump to Quick Start

Compatibility

Browser:
Compatible with both desktop and mobile platforms
Compatible with CPU, WebGL, WASM backends
Compatible with WebWorker execution
Compatible with WebView
NodeJS:
Compatibile with WASM backend for executions on architectures where tensorflow binaries are not available
Compatible with tfjs-node using software execution via tensorflow shared libraries
Compatible with tfjs-node using GPU-accelerated execution via tensorflow shared libraries and nVidia CUDA

Releases

Demos

Check out Simple Live Demo fully annotated app as a good start starting point (html)(code)

Check out Main Live Demo app for advanced processing of of webcam, video stream or images static images with all possible tunable options

To start video detection, simply press Play
To process images, simply drag & drop in your Browser window
Note: For optimal performance, select only models you'd like to use
Note: If you have modern GPU, WebGL (default) backend is preferred, otherwise select WASM backend

Browser Demos

All browser demos are self-contained without any external dependencies

Full [Live] [Details]: Main browser demo app that showcases all Human capabilities
Simple [Live] [Details]: Simple demo in WebCam processing demo in TypeScript
Embedded [Live] [Details]: Even simpler demo with tiny code embedded in HTML file
Face Detect [Live] [Details]: Extract faces from images and processes details
Face Match [Live] [Details]: Extract faces from images, calculates face descriptors and similarities and matches them to known database
Face ID [Live] [Details]: Runs multiple checks to validate webcam input before performing face match to faces in IndexDB
Multi-thread [Live] [Details]: Runs each Human module in a separate web worker for highest possible performance
NextJS [Live] [Details]: Use Human with TypeScript, NextJS and ReactJS
ElectronJS [Details]: Use Human with TypeScript and ElectonJS to create standalone cross-platform apps
3D Analysis with BabylonJS [Live] [Details]: 3D tracking and visualization of heead, face, eye, body and hand
VRM Virtual Model Tracking with Three.JS [Live] [Details]: VR model with head, face, eye, body and hand tracking
VRM Virtual Model Tracking with BabylonJS [Live] [Details]: VR model with head, face, eye, body and hand tracking

NodeJS Demos

NodeJS demos may require extra dependencies which are used to decode inputs
See header of each demo to see its dependencies as they are not automatically installed with Human

Main [Details]: Process images from files, folders or URLs using native methods
Canvas [Details]: Process image from file or URL and draw results to a new image file using node-canvas
Video [Details]: Processing of video input using ffmpeg
WebCam [Details]: Processing of webcam screenshots using fswebcam
Events [Details]: Showcases usage of Human eventing to get notifications on processing
Similarity [Details]: Compares two input images for similarity of detected faces
Face Match [Details]: Parallel processing of face match in multiple child worker threads
Multiple Workers [Details]: Runs multiple parallel human by dispaching them to pool of pre-created worker processes
Dynamic Load [Details]: Loads Human dynamically with multiple different desired backends

Project pages

Wiki pages

Additional notes

See issues and discussions for list of known limitations and planned enhancements

Suggestions are welcome!

App Examples

Visit Examples gallery for more examples

Options

All options as presented in the demo application...
demo/index.html

Results Browser:
[ Demo -> Display -> Show Results ]

Advanced Examples

Face Similarity Matching:
Extracts all faces from provided input images,
sorts them by similarity to selected face
and optionally matches detected face with database of known people to guess their names

demo/facematch

Face Detect:
Extracts all detect faces from loaded images on-demand and highlights face details on a selected face

demo/facedetect

Face ID:
Performs validation check on a webcam input to detect a real face and matches it to known faces stored in database

demo/faceid

3D Rendering:

human-motion

VR Model Tracking:

human-three-vrm
human-bjs-vrm

Human as OS native application:

human-electron

468-Point Face Mesh Defails:
(view in full resolution to see keypoints)

Quick Start

Simply load Human (IIFE version) directly from a cloud CDN in your HTML file:
(pick one: jsdelirv, unpkg or cdnjs)

<!DOCTYPE HTML>
<script src="https://cdn.jsdelivr.net/npm/@vladmandic/human/dist/human.js"></script>
<script src="https://unpkg.dev/@vladmandic/human/dist/human.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/human/3.0.0/human.js"></script>

For details, including how to use Browser ESM version or NodeJS version of Human, see Installation

Code Examples

Simple app that uses Human to process video input and
draw output on screen using internal draw helper functions

// create instance of human with simple configuration using default values
const config = { backend: 'webgl' };
const human = new Human.Human(config);
// select input HTMLVideoElement and output HTMLCanvasElement from page
const inputVideo = document.getElementById('video-id');
const outputCanvas = document.getElementById('canvas-id');

function detectVideo() {
  // perform processing using default configuration
  human.detect(inputVideo).then((result) => {
    // result object will contain detected details
    // as well as the processed canvas itself
    // so lets first draw processed frame on canvas
    human.draw.canvas(result.canvas, outputCanvas);
    // then draw results on the same canvas
    human.draw.face(outputCanvas, result.face);
    human.draw.body(outputCanvas, result.body);
    human.draw.hand(outputCanvas, result.hand);
    human.draw.gesture(outputCanvas, result.gesture);
    // and loop immediate to the next frame
    requestAnimationFrame(detectVideo);
    return result;
  });
}

detectVideo();

or using async/await:

// create instance of human with simple configuration using default values
const config = { backend: 'webgl' };
const human = new Human(config); // create instance of Human
const inputVideo = document.getElementById('video-id');
const outputCanvas = document.getElementById('canvas-id');

async function detectVideo() {
  const result = await human.detect(inputVideo); // run detection
  human.draw.all(outputCanvas, result); // draw all results
  requestAnimationFrame(detectVideo); // run loop
}

detectVideo(); // start loop

or using Events:

// create instance of human with simple configuration using default values
const config = { backend: 'webgl' };
const human = new Human(config); // create instance of Human
const inputVideo = document.getElementById('video-id');
const outputCanvas = document.getElementById('canvas-id');

human.events.addEventListener('detect', () => { // event gets triggered when detect is complete
  human.draw.all(outputCanvas, human.result); // draw all results
});

function detectVideo() {
  human.detect(inputVideo) // run detection
    .then(() => requestAnimationFrame(detectVideo)); // upon detect complete start processing of the next frame
}

detectVideo(); // start loop

or using interpolated results for smooth video processing by separating detection and drawing loops:

const human = new Human(); // create instance of Human
const inputVideo = document.getElementById('video-id');
const outputCanvas = document.getElementById('canvas-id');
let result;

async function detectVideo() {
  result = await human.detect(inputVideo); // run detection
  requestAnimationFrame(detectVideo); // run detect loop
}

async function drawVideo() {
  if (result) { // check if result is available
    const interpolated = human.next(result); // get smoothened result using last-known results
    human.draw.all(outputCanvas, interpolated); // draw the frame
  }
  requestAnimationFrame(drawVideo); // run draw loop
}

detectVideo(); // start detection loop
drawVideo(); // start draw loop

or same, but using built-in full video processing instead of running manual frame-by-frame loop:

const human = new Human(); // create instance of Human
const inputVideo = document.getElementById('video-id');
const outputCanvas = document.getElementById('canvas-id');

async function drawResults() {
  const interpolated = human.next(); // get smoothened result using last-known results
  human.draw.all(outputCanvas, interpolated); // draw the frame
  requestAnimationFrame(drawResults); // run draw loop
}

human.video(inputVideo); // start detection loop which continously updates results
drawResults(); // start draw loop

or using built-in webcam helper methods that take care of video handling completely:

const human = new Human(); // create instance of Human
const outputCanvas = document.getElementById('canvas-id');

async function drawResults() {
  const interpolated = human.next(); // get smoothened result using last-known results
  human.draw.canvas(outputCanvas, human.webcam.element); // draw current webcam frame
  human.draw.all(outputCanvas, interpolated); // draw the frame detectgion results
  requestAnimationFrame(drawResults); // run draw loop
}

await human.webcam.start({ crop: true });
human.video(human.webcam.element); // start detection loop which continously updates results
drawResults(); // start draw loop

And for even better results, you can run detection in a separate web worker thread

Inputs

Human library can process all known input types:

Image, ImageData, ImageBitmap, Canvas, OffscreenCanvas, Tensor,
HTMLImageElement, HTMLCanvasElement, HTMLVideoElement, HTMLMediaElement

Additionally, HTMLVideoElement, HTMLMediaElement can be a standard <video> tag that links to:

WebCam on user's system
Any supported video type
e.g. .mp4, .avi, etc.
Additional video types supported via HTML5 Media Source Extensions
e.g.: HLS (HTTP Live Streaming) using hls.js or DASH (Dynamic Adaptive Streaming over HTTP) using dash.js
WebRTC media track using built-in support

Detailed Usage

TypeDefs

Human is written using TypeScript strong typing and ships with full TypeDefs for all classes defined by the library bundled in types/human.d.ts and enabled by default

Note: This does not include embedded tfjs
If you want to use embedded tfjs inside Human (human.tf namespace) and still full typedefs, add this code:

import type * as tfjs from '@vladmandic/human/dist/tfjs.esm';
const tf = human.tf as typeof tfjs;

This is not enabled by default as Human does not ship with full TFJS TypeDefs due to size considerations
Enabling tfjs TypeDefs as above creates additional project (dev-only as only types are required) dependencies as defined in @vladmandic/human/dist/tfjs.esm.d.ts:

@tensorflow/tfjs-core, @tensorflow/tfjs-converter, @tensorflow/tfjs-backend-wasm, @tensorflow/tfjs-backend-webgl

Default models

Default models in Human library are:

Face Detection: MediaPipe BlazeFace Back variation
Face Mesh: MediaPipe FaceMesh
Face Iris Analysis: MediaPipe Iris
Face Description: HSE FaceRes
Emotion Detection: Oarriaga Emotion
Body Analysis: MoveNet Lightning variation
Hand Analysis: HandTrack & MediaPipe HandLandmarks
Body Segmentation: Google Selfie
Object Detection: CenterNet with MobileNet v3

Note that alternative models are provided and can be enabled via configuration
For example, body pose detection by default uses MoveNet Lightning, but can be switched to MultiNet Thunder for higher precision or Multinet MultiPose for multi-person detection or even PoseNet, BlazePose or EfficientPose depending on the use case

For more info, see Configuration Details and List of Models

Diagnostics

How to get diagnostic information or performance trace information

Human library is written in TypeScript 5.1 using TensorFlow/JS 4.10 and conforming to latest JavaScript ECMAScript version 2022 standard

Build target for distributables is JavaScript EMCAScript version 2018

For details see Wiki Pages
and API Specification

	async warmup(userConfig) {
	const b64toBlob = (base64, type = 'application/octet-stream') => fetch(`data:${type};base64,${base64}`).then((res) => res.blob());

	if (userConfig) this.config = mergeDeep(this.config, userConfig);
	const video = this.config.videoOptimized;
	this.config.videoOptimized = false;
	let blob;
	switch (this.config.warmup) {
	case 'face': blob = await b64toBlob(sample.face); break;
	case 'full': blob = await b64toBlob(sample.body); break;
	default: blob = null;
	}
	if (!blob) return null;
	const bitmap = await createImageBitmap(blob);
	const t0 = now();
	const warmup = await this.detect(bitmap, config);
	const t1 = now();
	bitmap.close();
	log('Warmup', this.config.warmup, (t1 - t0), warmup);
	this.config.videoOptimized = video;
	return warmup;
	}
	}

	async warmup(userConfig) {
	if (userConfig) this.config = mergeDeep(this.config, userConfig);
	return new Promise((resolve) => {
	const video = this.config.videoOptimized;
	this.config.videoOptimized = false;
	let src;
	let size;
	switch (this.config.warmup) {
	case 'face':
	size = 256;
	src = sample.face;
	break;
	case 'full':
	size = 1200;
	src = sample.body;
	break;
	default:
	size = 0;
	src = null;
	}
	const img = new Image(size, size);
	img.onload = () => {
	const canvas = (typeof OffscreenCanvas !== 'undefined') ? new OffscreenCanvas(size, size) : document.createElement('canvas');
	canvas.width = size;
	canvas.height = size;
	const ctx = canvas.getContext('2d');
	ctx.drawImage(img, 0, 0);
	const data = ctx.getImageData(0, 0, size, size);
	const t0 = now();
	this.detect(data, config).then((warmup) => {
	const t1 = now();
	log('Warmup', this.config.warmup, (t1 - t0), warmup);
	this.config.videoOptimized = video;
	resolve(warmup);
	});
	};
	if (src) img.src = src;
	else resolve(null);
	});
	}
	}

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