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這篇文章主要為大家展示了“如何使用HTML5實現人臉識別活體認證”，內容簡而易懂，條理清晰，希望能夠幫助大家解決疑惑，下面讓小編帶領大家一起研究并學習一下“如何使用HTML5實現人臉識別活體認證”這篇文章吧。
示例：
<!DOCTYPE html>
<!--
Ideally these elements aren't created until it's confirmed that the
client supports video/camera, but for the sake of illustrating the
elements involved, they are created with markup (not JavaScript)
-->
<html>
<meta charset="GBK">
<style>
#container {
position : relative;
}
#canvas {
position : absolute;
left : 0;
top : 0;
}
</style>
<script src="utils.js"></script>
<script src="clmtrackr.js"></script>
<script src="./models/model_pca_20_svm.js"></script>
<script src="numeric.js"></script>
<script src="ccv.js"></script>
<audio id="media">
你的瀏覽器不支持audio標簽。
</audio>
<div id="container">
<video id="video" width="600" height="400" autoplay >
您的瀏覽器不支持video標簽
</video>
<canvas id="canvas" width="600" height="400"></canvas>
</div>
<button id="snap">Snap Photo</button>
<button id="start">Start</button>
<button id="showposition">顯示</button>
<button id="hideposition">不顯示</button>
<br/>
<button id="mouse">張嘴驗證</button>
<button id="head">搖頭驗證</button>
<button id="eye">眨眼驗證</button>
<div id="tip">
</div>
<div id="result">
</div>
<div id="msg">
</div>
<div id="positions">
</div>
<script>
var showpos=false;
// Put event listeners into place
//window.addEventListener("DOMContentLoaded", function() {
// Grab elements, create settings, etc.
var canvas = document.getElementById("canvas"),
context = canvas.getContext("2d"),
video = document.getElementById("video"),
videoObj = { "video": true },
errBack = function(error) {
if (error.PERMISSION_DENIED) {
jAlert('用戶拒絕了瀏覽器請求媒體的權限', '提示');
} else if (error.NOT_SUPPORTED_ERROR) {
jAlert('對不起，您的瀏覽器不支持拍照功能，請使用其他瀏覽器', '提示');
} else if (error.MANDATORY_UNSATISFIED_ERROR) {
jAlert('指定的媒體類型未接收到媒體流', '提示');
} else {
jAlert('系統未能獲取到攝像頭，請確保攝像頭已正確安裝。或嘗試刷新頁面，重試', '提示');
}
};
// Put video listeners into place
if(navigator.getUserMedia) { // Standard
navigator.getUserMedia(videoObj, function(stream) {
video.src = stream;
video.play();
}, errBack);
} else if(navigator.webkitGetUserMedia) { // WebKit-prefixed
try{
navigator.webkitGetUserMedia(videoObj, function(stream){
video.src = window.webkitURL.createObjectURL(stream);
video.play();
}, errBack);
}catch(error){
alert(error);
}
}
else if(navigator.mozGetUserMedia) { // Firefox-prefixed
navigator.mozGetUserMedia(videoObj, function(stream){
video.src = window.URL.createObjectURL(stream);
video.play();
}, errBack);
}
// Trigger photo take
document.getElementById("snap").addEventListener("click", function() {
context.drawImage(video, 0, 0, 600, 400);
});
document.getElementById("start").addEventListener("click", function() {
startTrack();
});
document.getElementById("showposition").addEventListener("click", function() {
showpos=true;
});
document.getElementById("hideposition").addEventListener("click", function() {
showpos=false;
});
document.getElementById("mouse").addEventListener("click", function() {
alive_mouse();
});
document.getElementById("head").addEventListener("click", function() {
alive_head();
});
document.getElementById("eye").addEventListener("click", function() {
alive_eye();
});
//}, false);
</script>
<script>
//////////////////////////////////////////////////////////////////////////////
//活體
var last_time=0;//時間因素
var last_nose_left=0;
var last_nose_top=0;
//張嘴動作
var is_mouse_ok=false;
var is_alive_mouse=false;
var last_dis_eye_norse=0;
var last_dis_mouse=0;
function alive_mouse(){
var media = document.getElementById("media");
media.src="mp3/alive_mouse.mp3";
media.play();
document.getElementById("tip").innerHTML="請張合嘴巴";
document.getElementById('result').innerHTML = "";
is_mouse_ok=false;
last_dis_mouse=0;
last_time=0;
last_dis_eye_norse=100000000;
is_alive_head=false;
is_alive_mouse=true;
is_alive_eye=false;
}
//搖頭動作
var is_head_ok=false;
var is_alive_head=false;
var last_dis_left_right=100000000;
function alive_head(){
var media = document.getElementById("media");
media.src="mp3/alive_head.mp3";
media.play();
document.getElementById("tip").innerHTML="請在水平方向左右搖頭";
document.getElementById('result').innerHTML = "";
is_head_ok=false;
last_dis_left_right=100000000;
last_time=0;
is_alive_head=true;
is_alive_mouse=false;
is_alive_eye=false;
}
//眨眼動作
var is_alive_eye=false;
var is_eye_ok = false;
function alive_eye(){
var media = document.getElementById("media");
media.src="mp3/alive_eye.mp3";
media.play();
document.getElementById("tip").innerHTML="請眨眼";
document.getElementById('result').innerHTML = "";
is_eye_ok=false;
last_dis_eye_norse=100000000;
last_nose_left=0;
last_nose_top=0;
last_time=0;
is_alive_head=false;
is_alive_mouse=false;
is_alive_eye=true;
}
function startTrack(){
var videoInput = document.getElementById('video');
var ctracker = new clm.tracker();
ctracker.init(pModel);
ctracker.start(videoInput);
var canvasInput = document.getElementById('canvas');
var cc = canvasInput.getContext('2d');
cc.lineWidth=3;
function drawLoop() {
//requestAnimationFrame(drawLoop);
cc.clearRect(0, 0, canvasInput.width, canvasInput.height);
//ctracker.draw(canvasInput );
var positions = ctracker.getCurrentPosition();
if (showpos && positions) {
for (var p = 0;p < positions.length;p++) {
positionString += "featurepoint "+p+" : ["+positions[p][0].toFixed(2)+","+positions[p][1].toFixed(2) +"]<br/>";
}
document.getElementById('positions').innerHTML = positionString;
}
if(positions){
for (var p =0;p < 71;p++) {
cc.beginPath();
cc.arc(positions[p][0].toFixed(2), positions[p][1].toFixed(2),2, 0, Math.PI * 2, true);
cc.closePath();
cc.fillStyle = '#00FF00';
cc.fill();
}
//cc.strokeStyle = 'red';
//0-14 輪廓
//7 下吧，最下
//2 最左邊
//12 最右邊
//15-22 眉毛
//23-27 左眼睛五個點
//27 左眼中間
//63-66 左眼四個點
//28-32 右眼睛五個點
//67-70 右眼四個點
//33-43 鼻子
//62 鼻中間
//44-61 嘴巴
//47 嘴巴上
//53 嘴巴下
///////////////////////////////////////////////////////////////////////////////////////////////
//左眼中間
for (var p =27;p <=27;p++) {
cc.beginPath();
cc.arc(positions[p][0].toFixed(2), positions[p][1].toFixed(2), 2, 0, Math.PI * 2, true);
cc.closePath();
cc.fillStyle = 'red';
cc.fill();
}
//鼻子中間
for (var p =62;p <=62;p++) {
cc.beginPath();
cc.arc(positions[p][0].toFixed(2), positions[p][1].toFixed(2), 2, 0, Math.PI * 2, true);
cc.closePath();
cc.fillStyle = 'red';
cc.fill();
}
//嘴巴上
for (var p =57;p <=57;p++) {
cc.beginPath();
cc.arc(positions[p][0].toFixed(2), positions[p][1].toFixed(2), 2, 0, Math.PI * 2, true);
cc.closePath();
cc.fillStyle = 'red';
cc.fill();
}
//嘴巴下
for (var p =60;p <=60;p++) {
cc.beginPath();
cc.arc(positions[p][0].toFixed(2), positions[p][1].toFixed(2), 2, 0, Math.PI * 2, true);
cc.closePath();
cc.fillStyle = 'red';
cc.fill();
}
//////////////////////////////////////
//head
if(is_alive_head==true){
if(last_time==0 || (new Date().getTime()-last_time>500 && new Date().getTime()-last_time<10000 ) ){
var xdiff_left = positions[62][0] - positions[2][0] ;
var ydiff_left = positions[62][1] - positions[2][1] ;
var dis_left = Math.pow((xdiff_left * xdiff_left + ydiff_left * ydiff_left), 0.5);
var xdiff_right = positions[12][0] - positions[62][0] ;
var ydiff_right = positions[12][1] - positions[62][1] ;
var dis_right = Math.pow((xdiff_right * xdiff_right + ydiff_right * ydiff_right), 0.5);
var xdiff_side = positions[12][0] - positions[2][0] ;
var ydiff_side = positions[12][1] - positions[2][1] ;
var dis_side = Math.pow((xdiff_side * xdiff_side + ydiff_side * ydiff_side), 0.5);
var dis_left_right = dis_left - dis_right;
document.getElementById('result').innerHTML = dis_left_right;
if(last_dis_left_right>0 && dis_left_right > dis_side/3){
document.getElementById('result').innerHTML = "通過";
is_head_ok=true;
is_alive_head=false;
}
last_dis_left_right=dis_left_right;
last_time = new Date().getTime();
}
}
/////////////////////////////////////
//mouse
if(is_alive_mouse==true){
if(last_time==0 || (new Date().getTime()-last_time>500 && new Date().getTime()-last_time<10000 ) ){
//研究和鼻子距離
var xdiff = positions[62][0] - positions[27][0] ;
var ydiff = positions[62][1] - positions[27][1] ;
var dis_eye_norse = Math.pow((xdiff * xdiff + ydiff * ydiff), 0.5);
//上嘴唇 和下嘴唇距離
var xdiff_mouse = positions[53][0] - positions[47][0] ;
var ydiff_mouse = positions[53][1] - positions[47][1] ;
var dis_mouse = Math.pow((xdiff_mouse * xdiff_mouse + ydiff_mouse * ydiff_mouse), 0.5);
//上次的眼鼻距離和這次的眼鼻距離差
var dn= Math.abs(dis_eye_norse-last_dis_eye_norse);
//上次的嘴距離和本次的嘴距離差
var dm=Math.abs(dis_mouse - last_dis_mouse);
//鼻子的位置確保變化不大
if(last_nose_left>0 && last_nose_top>0
&& Math.abs(positions[62][0]-last_nose_left)<5
&& Math.abs(positions[62][1]-last_nose_top)<5
){
document.getElementById('msg').innerHTML = dn;
if(last_dis_eye_norse>0 && dn < dis_eye_norse*1/50){
if(last_dis_mouse>0 && dm > dis_mouse/10){
document.getElementById('result').innerHTML = "通過";
is_alive_mouse=false;
is_mouse_ok=true;
}
}
}
last_dis_mouse = dis_mouse;
last_dis_eye_norse = dis_eye_norse;
last_time = new Date().getTime();
last_nose_left = positions[62][0];
last_nose_top = positions[62][1];
}
}
/////////////////////////////////////
//eye
if(is_alive_eye==true){
if(last_time==0 || (new Date().getTime()-last_time>10 ) ){
var xdiff1 = positions[62][0] - positions[27][0] ;
var ydiff1 = positions[62][1] - positions[27][1] ;
var dis_eye_norse1 = Math.pow((xdiff1 * xdiff1 + ydiff1 * ydiff1), 0.5);
var xdiff2 = positions[62][0] - positions[32][0] ;
var ydiff2 = positions[62][1] - positions[32][1] ;
var dis_eye_norse2 = Math.pow((xdiff2 * xdiff2 + ydiff2 * ydiff2), 0.5);
var dis_eye_norse = (dis_eye_norse1 + dis_eye_norse2);
if(last_nose_left>0 && last_nose_top>0
&& Math.abs(positions[62][0]-last_nose_left)<0.5
&& Math.abs(positions[62][1]-last_nose_top)<0.5
){
document.getElementById('msg').innerHTML = Math.abs(dis_eye_norse - last_dis_eye_norse) - dis_eye_norse*1/20;
if(last_dis_eye_norse>0 && (Math.abs(dis_eye_norse - last_dis_eye_norse) > dis_eye_norse*1/20 ) ){
document.getElementById('result').innerHTML = "通過";
is_alive_eye=false;
is_eye_ok=true;
}
}
last_nose_left = positions[62][0];
last_nose_top = positions[62][1];
last_dis_eye_norse = dis_eye_norse;
last_time = new Date().getTime();
}
}
}
requestAnimationFrame(drawLoop);
}
drawLoop();
}
</script>
</html>以上是“如何使用HTML5實現人臉識別活體認證”這篇文章的所有內容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內容對大家有所幫助，如果還想學習更多知識，歡迎關注億速云行業資訊頻道！
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