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hand-detection-webcam.js
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"use strict"
module.exports = function(RED) {
function HandDetectioWebcamNode(config) {
function HTML() {
const html = String.raw`
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="https://cdn.jsdelivr.net/npm/@mediapipe/control_utils/control_utils.js" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/@mediapipe/drawing_utils/drawing_utils.js" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/@mediapipe/hands/hands.js" crossorigin="anonymous"></script>
<script src="https://cdn.socket.io/4.1.2/socket.io.min.js" integrity="sha384-toS6mmwu70G0fw54EGlWWeA4z3dyJ+dlXBtSURSKN4vyRFOcxd3Bzjj/AoOwY+Rg" crossorigin="anonymous"></script>
<link rel="shortcut icon" type="image/x-icon" href="https://cdn-icons-png.flaticon.com/512/1658/1658879.png">
<title>Hands Detection</title>
<style>
a {
text-decoration: none;
}
body {
overflow-y: scroll;
}
.btn {
border: none;
width: 100px;
height: 25px;
border-radius: 10px;
}
.btn:first-child {
background-color: #B2A1F4;
color: white;
}
.btn:hover {
cursor: pointer;
}
.btn:hover:first-child {
background-color: #7557f0;
}
.btn:hover:last-child {
background-color: grey;
}
table {
width: 100%;
border-collapse: collapse;
}
th,
td {
border: 1px solid rgb(216, 216, 216);
padding: 3px;
}
.tooltip {
position: relative;
display: inline-block;
}
.tooltip .tooltip-content {
visibility: hidden;
background-color: rgba(255, 255, 255, 0.8);
color: black;
text-align: center;
position: absolute;
top: 3px;
left: 3px;
padding-left: 15px;
padding-right: 15px;
margin-top: 0px;
border-radius: 10px;
z-index: 1;
}
.tooltip:hover .tooltip-content {
visibility: visible;
}
#captrue-btn {
background-color: #B2A1F4;
border: 1px solid grey;
border-left: none;
height: 21px;
color: white;
}
#captrue-btn:hover {
background-color: #7557f0;
cursor: pointer;
}
</style>
</head>
<body>
<div align="center" style="min-height: 800px;">
<h1>Hands Detection Page</h1>
<div style="display: inline-block;" align="center" class="tooltip">
<video id="input-video" width="600px" height="340px" crossorigin="anonymous"
style="border:3px solid grey"></video><br>
<div class="tooltip-content">
<p>Your Camera</p>
</div>
</div>
<div style="display: inline-block;" align="center" class="tooltip">
<canvas id="output-canvas" width="600px" height="340px" style="border:3px solid #B2A1F4"></canvas><br>
<div class="tooltip-content">
<p>Tracking your hands</p>
</div>
</div>
<div>
<br>
<select id="secondTimer">
<option value="0" selected>Now</option>
<option value="1">1s Timer</option>
<option value="2">2s Timer</option>
<option value="3">3s Timer</option>
</select>
<input id="hand-motion-name" type="search" placeholder="Hands Motion Name"><button id="captrue-btn">Capture</button>
</div>
<div id="result-div" style="display: none;">
<p id="motion-result-message"></p>
<div id="regist-btn-bar" align="center">
<button id="regist-btn" class="btn">Regist</button> <button id="cancel-btn" class="btn">Cancel</button>
</div><br>
<canvas id="capture-canvas" width="480px" height="270px" style="border:1px solid black"></canvas>
<div id="motion-result-keypoint"></div>
</div>
</div>
<hr>
<div align="center" style="min-height: 100px;">
<br>
<a href="https://github.com/5FNSaaS">
<img style="width:15px"
src="data:image/svg+xml;base64,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" />
5FNSaaS
</a> |
<a href="https://github.com/rootkwak528">Hogeun Kwak</a> | <a href="https://github.com/eona1301">Hyeona Dang</a>
| <a href="https://github.com/whgusalsdl">Hyeonmin Cho</a> | <a href="https://github.com/483759">Ijin Yun</a> |
<a href="https://github.com/steven9408">Yeorae Jo</a><br>
</div>
</body>
</html>
<script type="module">
// 비활성화된 탭에서도 캔버스가 지속적으로 업데이트되도록 하기 위해
// 재귀적으로 생성되는 빈 오디오 트랙의 Loop를 사용합니다. (각 오디오 트랙의 지속시간은 10fps 기준 0.1초)
// 빈 오디오 트랙의 생성자 함수에 캔버스 렌더링 메소드를 포함해 지속적 렌더링이 가능해집니다.
// 관련 링크 : https://stackoverflow.com/questions/44156528/canvas-doesnt-repaint-when-tab-inactive-backgrounded-for-recording-webgl
// DOM 엘리먼트
const inputElement = document.getElementById('input-video')
const outputElement = document.getElementById('output-canvas')
const captureElement = document.getElementById('capture-canvas')
const outputCtx = outputElement.getContext('2d')
const captureCtx = captureElement.getContext('2d')
// Detection 데이터 전송할 웹소켓 인스턴스 생성
const dataWebSocket = new WebSocket('${config.dataSocketUrl}')
/* detection start */
// 디텍션 시작 함수
function startDetect(renderFunc) {
// 최초의 오디오 트랙을 생성한다.
// (Loop 정지 함수는 현재 사용하지 않고 있음, 개발자의 취지에 따라 커스터마이징 가능)
const fps = 60
const stopLoop = audioTimerLoop(renderFunc, 1000 / fps)
}
/* audio Timer Loop function */
// 오디오 트랙 Loop 생성자
function audioTimerLoop(renderFunc, frequency) {
const freq = frequency / 1000 // AudioContext는 second 단위
const aCtx = new AudioContext()
const silence = aCtx.createGain()
silence.gain.value = 0
silence.connect(aCtx.destination) // 오디오 트랙 비우기 (추측)
onOSCend()
let stopped = false // loop를 멈추기 위한 flag
async function onOSCend() {
// 캔버스 렌더링 (비동기)
await renderFunc()
// loop 생성
const osc = aCtx.createOscillator()
osc.onended = onOSCend // loop가 되는 이유
osc.connect(silence)
osc.start() // 당장 시작
osc.stop(aCtx.currentTime + freq) // 한 프레임 이후 정지
// loop 정지
if (stopped) {
osc.onended = function () {
aCtx.close()
return
}
}
}
// loop를 정지하기 위한 함수를 반환한다.
return function () {
stopped = true
}
}
/* motion regist timer */
const timerSecond = document.getElementById("secondTimer")
let second = timerSecond.options[timerSecond.selectedIndex].value
let poseData = null
let poseName = null
let poseDataResult = null
document.getElementById("secondTimer").addEventListener('change', () => {
second = timerSecond.options[timerSecond.selectedIndex].value
})
/* motion name empty check */
var handMotionName = document.getElementById("hand-motion-name")
document.getElementById("captrue-btn").addEventListener('click', () => {
if (handMotionName.value === "" || handMotionName.value === undefined) {
isFail("[Fail] Invalid Name : The motion name is empty.")
} else if (poseData == null) {
isFail("[Fail] Keypoint not found. Show your hands on cam!");
}
else {
onCapture(handMotionName.value)
}
})
function isFail(message) {
document.getElementById("motion-result-message").style.color = "red"
document.getElementById("motion-result-message").textContent = message
captureElement.style.display = "none"
document.getElementById("result-div").style.display = "block"
document.getElementById("regist-btn-bar").style.display = "none";
}
/* hands motion capture used timer if sucess regist*/
function onCapture(motionName){
setTimeout(() => {
captureCtx.drawImage(outputElement, 0, 0, captureElement.width, captureElement.height);
let detail = "";
const fixed = 5;
// hands motion keypoint data table
for (let idx = 0; idx < poseData.multiHandedness.length; idx++) {
detail += "<table style='display:inline;margin:0px 5px;'>";
detail += "<tr><th colspan='4' align='center'>"+poseData.multiHandedness[idx].label+" (score:"+poseData.multiHandedness[idx].score.toFixed(fixed)+")</th></tr>";
detail += "<tr align='center'><td></td><td>x</td><td>y</td><td>z</td></tr>"
for (let index = 0; index < 21; index++) {
detail += "<tr>";
detail += "<td align='center'>"+index+"</td>";
detail += "<td>"+poseData.multiHandLandmarks[idx][index].x.toFixed(fixed)+"</td>"
detail += "<td>"+poseData.multiHandLandmarks[idx][index].y.toFixed(fixed)+"</td>"
detail += "<td>"+poseData.multiHandLandmarks[idx][index].z.toFixed(fixed)+"</td>"
detail += "</tr>";
}
detail += "</table>";
}
/* Save data immediately after timer runs */
poseData["regist"] = true;
poseData["poseName"] = handMotionName.value;
poseDataResult = poseData;
document.getElementById("motion-result-keypoint").innerHTML = '<br><b>' + motionName + "</b> Motion Detail <br><br>" + detail;
document.getElementById("motion-result-message").style.color = "green";
document.getElementById("motion-result-message").textContent = "[" + motionName +"] motion captured! Is this the behavior you want?";
captureElement.style.display = "block"
document.getElementById("regist-btn-bar").style.display = "block";
document.getElementById("result-div").style.display = "block";
}, second*1000);
}
/* send pose data */
document.getElementById("regist-btn").addEventListener('click', function () {
document.getElementById("motion-result-message").style.color = "green";
document.getElementById("motion-result-message").textContent = "[" + handMotionName.value + "] Data sent successfully! Check out the registration results!";
dataWebSocket.send(JSON.stringify(poseDataResult));
})
/* result message reset*/
document.getElementById("hand-motion-name").addEventListener('focus', onClear);
document.getElementById("cancel-btn").addEventListener('click', function () {
document.getElementById("hand-motion-name").value = "";
onClear();
});
function onClear() {
document.getElementById("motion-result-message").textContent = "";
document.getElementById("motion-result-keypoint").innerHTML = "";
document.getElementById("result-div").style.display = "none";
}
// 모니터링 관련 소켓 인스턴스 생성
const urlCreator = window.URL || window.webkitURL
const monitorUrl = 'http://${config.serverUrl}:${config.monitorPort}'
const monitorSocket = io(monitorUrl)
monitorSocket.on("connect", () => {
console.log("connection server")
})
/* keypoint rendering function */
function onResults(results) {
outputCtx.save()
outputCtx.clearRect(0, 0, outputElement.width, outputElement.height)
outputCtx.globalCompositeOperation = 'destination-atop'
outputCtx.drawImage(results.image, 0, 0, outputElement.width, outputElement.height)
outputCtx.globalCompositeOperation = 'source-over'
if (results.multiHandLandmarks) {
for (const landmarks of results.multiHandLandmarks) {
drawConnectors(outputCtx, landmarks, HAND_CONNECTIONS,
{color: '#f2d6ae', lineWidth: 5});
drawLandmarks(outputCtx, landmarks, {color: '#b2a1f4', lineWidth: 1});
results.regist = false;
results.poseName = null;
dataWebSocket.send(JSON.stringify(results));
poseData = results;
}
}
outputCtx.restore();
// transport <canvas> data in form of blob. (I referenced the link below)
// 캔버스 데이터를 블롭화하여 미러링 노드로 전송 (아래 링크 참고하였음)
// https://github.com/Infocatcher/Right_Links/issues/25
// https://developer.mozilla.org/en-US/docs/Web/API/HTMLoutputElement/toBlob
if (monitorSocket.connected) {
outputElement.toBlob(function (blob) {
const imageUrl = urlCreator.createObjectURL(blob)
monitorSocket.emit('video', imageUrl)
}, 'image/webp')
}
}
const hands = new Hands({locateFile: (file) => {
return 'https://cdn.jsdelivr.net/npm/@mediapipe/hands/'+file;
}});
hands.setOptions({
maxNumHands: 2,
minDetectionConfidence: 0.6,
minTrackingConfidence: 0.5
});
hands.onResults(onResults);
/* async rendering function */
async function render() {
await hands.send({ image: inputElement })
}
/* media data setting */
const mediaConstraints = {
audio: false, // modify change if you want audio data
video: { width: 600, height: 340 }
}
navigator.mediaDevices.getUserMedia(mediaConstraints)
.then(stream => {
inputElement.srcObject = stream
inputElement.oncanplay = function (e) {
inputElement.play()
.then(() => {
startDetect(render)
})
}
})
.catch(err => {
console.log(err)
})
</script>
`
return html
}
RED.nodes.createNode(this, config)
// listener to receive messages from the up-stream nodes in a flow.
this.on('input', (msg, send, done) => {
// return HTML document to the client.
// 클라이언트에 HTML 문서 반환
msg.payload = HTML()
send = send || function() { this.send.apply(this, arguments )}
send(msg)
})
}
RED.nodes.registerType("hand-detection-webcam", HandDetectioWebcamNode)
}