纯js实现人脸识别眨眨眼张张嘴案例——alive_face.js

        $(function(){
            //执行开始的方法
            //showpos = true;
            startTrack();
        })
        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);
        }
        //张嘴
        document.getElementById("mouse").addEventListener("click", function() {
            var audio = document.createElement('audio');
            var source = document.createElement('source');
            source.type = "audio/mp3";
            source.src = "mp3/alive_mouse.mp3";
            source.autoplay = "autoplay";
            source.controls = "controls";
            audio.appendChild(source);
            audio.play();
            alive_mouse();
        });
        //摇头
        document.getElementById("head").addEventListener("click", function() {
            alive_head();
        });
        //眨眨眼
        document.getElementById("eye").addEventListener("click", function() {
            var audio = document.createElement('audio');
            var source = document.createElement('source');
            source.type = "audio/mp3";
            source.src = "mp3/alive_eye.mp3";
            source.autoplay = "autoplay";
            source.controls = "controls";
            audio.appendChild(source);
            audio.play();
            alive_eye();
        });
        //}, false);
        //////////////////////////////////////////////////////////////////////////////
        //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;
        //检测张嘴动作
        function alive_mouse() {
            document.getElementById("tip").innerHTML = "请张合嘴巴";
            document.getElementById('result').value = "";
            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() {
            document.getElementById("tip").innerHTML = "请在水平方向左右摇头";
            document.getElementById('result').value = "";
            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() {
            document.getElementById("tip").innerHTML = "请眨眼";
            document.getElementById('result').value = "";
            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').value = dis_left_right;
                            if(last_dis_left_right > 0 && dis_left_right > dis_side / 3) {
                                document.getElementById('result').value = "通过";
                                var msg_m =document.getElementById('result'); 
                                if(msg_m.value=='通过'){
                                    //执行其他方法
                                    is_head_ok = true;
                                    is_alive_head = false;
                                    location.href="http://muxiongxiong.top"
                                }
                            }
                            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').value = "通过";
                                        var msg_mouse = document.getElementById('result');
                                        if(msg_mouse.value=='通过'){
                                            //验证摇头
                                            is_alive_mouse = false;
                                            is_mouse_ok = true;
                                            var audio = document.createElement('audio');
                                            var source = document.createElement('source');
                                            source.type = "audio/mp3";
                                            source.src = "mp3/alive_head.mp3";
                                            source.autoplay = "autoplay";
                                            source.controls = "controls";
                                            audio.appendChild(source);
                                            audio.play();
                                            alive_head();
                                        }
                                    }
                                }
                            }
                            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').value = "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();
        }