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近几年，人脸识别技术在身份认证领域的应用已经有了较多应用，例如：支付宝、招行的取款、养老金领取等方面，但在杜绝假冒、认证安全性等方面，目前还是一个比较需要进一步解决的课题，特别是在移动端的活体认证技术方面。本文介绍了在HTML5 环境下可以采用clmtrackr.js 检测工具，结合人脸模型，实现人脸的跟踪检测。同时采用动作识别实现活体认证。但本方案只能够在Firefox 或者Chrome中使用。并且只适合研究学习，实际场景中不太理想，需要进一步优化才能够应用。如果有人有相关的技术，可以推荐介绍给我。
<!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"> 你的浏览器不支持audio标签。 </audio> <p id="container"> <video id="video" width="600" height="400" autoplay > 您的浏览器不支持video标签 </video> <canvas id="canvas" width="600" height="400"></canvas> </p> <button id="snap">Snap Photo</button> <button id="start">Start</button> <button id="showposition">显示</button> <button id="hideposition">不显示</button> <br/> <button id="mouse">张嘴验证</button> <button id="head">摇头验证</button> <button id="eye">眨眼验证</button> <p id="tip"> </p> <p id="result"> </p> <p id="msg"> </p> <p id="positions"> </p> <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('用户拒绝了浏览器请求媒体的权限', '提示'); } else if (error.NOT_SUPPORTED_ERROR) { jAlert('对不起，您的浏览器不支持拍照功能，请使用其他浏览器', '提示'); } else if (error.MANDATORY_UNSATISFIED_ERROR) { jAlert('指定的媒体类型未接收到媒体流', '提示'); } else { jAlert('系统未能获取到摄像头，请确保摄像头已正确安装。或尝试刷新页面，重试', '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> ////////////////////////////////////////////////////////////////////////////// //活体 var last_time=0;//时间因素 var last_nose_left=0; var last_nose_top=0; //张嘴动作 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="请张合嘴巴"; 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; } //摇头动作 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="请在水平方向左右摇头"; 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; } //眨眼动作 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="请眨眼"; 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 轮廓 //7 下吧，最下 //2 最左边 //12 最右边 //15-22 眉毛 //23-27 左眼睛五个点 //27 左眼中间 //63-66 左眼四个点 //28-32 右眼睛五个点 //67-70 右眼四个点 //33-43 鼻子 //62 鼻中间 //44-61 嘴巴 //47 嘴巴上 //53 嘴巴下 /////////////////////////////////////////////////////////////////////////////////////////////// //左眼中间 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(); } //鼻子中间 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 = "通过"; 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 ) ){ //研究和鼻子距离 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 和下嘴唇距离 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); //上次的眼鼻距离和这次的眼鼻距离差 var dn= Math.abs(dis_eye_norse-last_dis_eye_norse); //上次的嘴距离和本次的嘴距离差 var dm=Math.abs(dis_mouse - last_dis_mouse); //鼻子的位置确保变化不大 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 = "通过"; 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 = "通过"; 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>登录后复制以上就是基于HTML5 的人脸识别活体认证的实现方法 的内容，更多相关内容请关注PHP中文网（www.php.cn）！
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