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tracking-min.js

tracking-min.js 27 KB
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  1. /**
    2. 

  2.  * tracking - A modern approach for Computer Vision on the web.
    3. 

  3.  * @author Eduardo Lundgren <edu@rdo.io>
    4. 

  4.  * @version v1.1.3
    5. 

  5.  * @link http://trackingjs.com
    6. 

  6.  * @license BSD
    7. 

  7.  */
    8. 

  8. !function(t,r){t.tracking=t.tracking||{},tracking.inherits=function(t,r){function n(){}n.prototype=r.prototype,t.superClass_=r.prototype,t.prototype=new n,t.prototype.constructor=t,t.base=function(t,n){var e=Array.prototype.slice.call(arguments,2);return r.prototype[n].apply(t,e)}},tracking.initUserMedia_=function(r,n){t.navigator.mediaDevices.getUserMedia({video:!0,audio:!(!n||!n.audio)}).then(function(t){r.srcObject=t})["catch"](function(t){throw Error("Cannot capture user camera.")})},tracking.isNode=function(t){return t.nodeType||this.isWindow(t)},tracking.isWindow=function(t){return!!(t&&t.alert&&t.document)},tracking.one=function(t,r){return this.isNode(t)?t:(r||document).querySelector(t)},tracking.track=function(t,r,n){if(t=tracking.one(t),!t)throw new Error("Element not found, try a different element or selector.");if(!r)throw new Error("Tracker not specified, try `tracking.track(element, new tracking.FaceTracker())`.");switch(t.nodeName.toLowerCase()){case"canvas":return this.trackCanvas_(t,r,n);case"img":return this.trackImg_(t,r,n);case"video":return n&&n.camera&&this.initUserMedia_(t,n),this.trackVideo_(t,r,n);default:throw new Error("Element not supported, try in a canvas, img, or video.")}},tracking.trackCanvas_=function(t,r){var n=this,e=new tracking.TrackerTask(r);return e.on("run",function(){n.trackCanvasInternal_(t,r)}),e.run()},tracking.trackCanvasInternal_=function(t,r){var n=t.width,e=t.height,a=t.getContext("2d"),i=a.getImageData(0,0,n,e);r.track(i.data,n,e)},tracking.trackImg_=function(t,r){var n=t.width,e=t.height,a=document.createElement("canvas");a.width=n,a.height=e;var i=new tracking.TrackerTask(r);return i.on("run",function(){tracking.Canvas.loadImage(a,t.src,0,0,n,e,function(){tracking.trackCanvasInternal_(a,r)})}),i.run()},tracking.trackVideo_=function(r,n){var e,a,i=document.createElement("canvas"),o=i.getContext("2d"),c=function(){e=r.offsetWidth,a=r.offsetHeight,i.width=e,i.height=a};c(),r.addEventListener("resize",c);var s,g=function(){s=t.requestAnimationFrame(function(){if(r.readyState===r.HAVE_ENOUGH_DATA){try{o.drawImage(r,0,0,e,a)}catch(t){}tracking.trackCanvasInternal_(i,n)}g()})},h=new tracking.TrackerTask(n);return h.on("stop",function(){t.cancelAnimationFrame(s)}),h.on("run",function(){g()}),h.run()},t.URL||(t.URL=t.URL||t.webkitURL||t.msURL||t.oURL),navigator.getUserMedia||(navigator.getUserMedia=navigator.getUserMedia||navigator.webkitGetUserMedia||navigator.mozGetUserMedia||navigator.msGetUserMedia)}(window),function(){tracking.EventEmitter=function(){},tracking.EventEmitter.prototype.events_=null,tracking.EventEmitter.prototype.addListener=function(t,r){if("function"!=typeof r)throw new TypeError("Listener must be a function");return this.events_||(this.events_={}),this.emit("newListener",t,r),this.events_[t]||(this.events_[t]=[]),this.events_[t].push(r),this},tracking.EventEmitter.prototype.listeners=function(t){return this.events_&&this.events_[t]},tracking.EventEmitter.prototype.emit=function(t){var r=this.listeners(t);if(r){for(var n=Array.prototype.slice.call(arguments,1),e=0;e<r.length;e++)r[e]&&r[e].apply(this,n);return!0}return!1},tracking.EventEmitter.prototype.on=tracking.EventEmitter.prototype.addListener,tracking.EventEmitter.prototype.once=function(t,r){var n=this;n.on(t,function e(){n.removeListener(t,e),r.apply(this,arguments)})},tracking.EventEmitter.prototype.removeAllListeners=function(t){return this.events_?(t?delete this.events_[t]:delete this.events_,this):this},tracking.EventEmitter.prototype.removeListener=function(t,r){if("function"!=typeof r)throw new TypeError("Listener must be a function");if(!this.events_)return this;var n=this.listeners(t);if(Array.isArray(n)){var e=n.indexOf(r);if(e<0)return this;n.splice(e,1)}return this},tracking.EventEmitter.prototype.setMaxListeners=function(){throw new Error("Not implemented")}}(),function(){tracking.Canvas={},tracking.Canvas.loadImage=function(t,r,n,e,a,i,o){var c=this,s=new window.Image;s.crossOrigin="*",s.onload=function(){var r=t.getContext("2d");t.width=a,t.height=i,r.drawImage(s,n,e,a,i),o&&o.call(c),s=null},s.src=r}}(),function(){tracking.DisjointSet=function(t){if(void 0===t)throw new Error("DisjointSet length not specified.");this.length=t,this.parent=new Uint32Array(t);for(var r=0;r<t;r++)this.parent[r]=r},tracking.DisjointSet.prototype.length=null,tracking.DisjointSet.prototype.parent=null,tracking.DisjointSet.prototype.find=function(t){return this.parent[t]===t?t:this.parent[t]=this.find(this.parent[t])},tracking.DisjointSet.prototype.union=function(t,r){var n=this.find(t),e=this.find(r);this.parent[n]=e}}(),function(){tracking.Image={},tracking.Image.blur=function(t,r,n,e){if(e=Math.abs(e),e<=1)throw new Error("Diameter should be greater than 1.");for(var a=e/2,i=Math.ceil(e)+(1-Math.ceil(e)%2),o=new Float32Array(i),c=(a+.5)/3,s=c*c,g=1/Math.sqrt(2*Math.PI*s),h=-1/(2*c*c),k=0,f=Math.floor(i/2),u=0;u<i;u++){var l=u-f,m=g*Math.exp(l*l*h);o[u]=m,k+=m}for(var d=0;d<o.length;d++)o[d]/=k;return this.separableConvolve(t,r,n,o,o,!1)},tracking.Image.computeIntegralImage=function(t,r,n,e,a,i,o){if(arguments.length<4)throw new Error("You should specify at least one output array in the order: sum, square, tilted, sobel.");var c;o&&(c=tracking.Image.sobel(t,r,n));for(var s=0;s<n;s++)for(var g=0;g<r;g++){var h=s*r*4+4*g,k=~~(.299*t[h]+.587*t[h+1]+.114*t[h+2]);if(e&&this.computePixelValueSAT_(e,r,s,g,k),a&&this.computePixelValueSAT_(a,r,s,g,k*k),i){var f=h-4*r,u=~~(.299*t[f]+.587*t[f+1]+.114*t[f+2]);this.computePixelValueRSAT_(i,r,s,g,k,u||0)}o&&this.computePixelValueSAT_(o,r,s,g,c[h])}},tracking.Image.computePixelValueRSAT_=function(t,r,n,e,a,i){var o=n*r+e;t[o]=(t[o-r-1]||0)+(t[o-r+1]||0)-(t[o-r-r]||0)+a+i},tracking.Image.computePixelValueSAT_=function(t,r,n,e,a){var i=n*r+e;t[i]=(t[i-r]||0)+(t[i-1]||0)+a-(t[i-r-1]||0)},tracking.Image.grayscale=function(t,r,n,e){for(var a=new Uint8ClampedArray(e?t.length:t.length>>2),i=0,o=0,c=0;c<n;c++)for(var s=0;s<r;s++){var g=.299*t[o]+.587*t[o+1]+.114*t[o+2];a[i++]=g,e&&(a[i++]=g,a[i++]=g,a[i++]=t[o+3]),o+=4}return a},tracking.Image.horizontalConvolve=function(t,r,n,e,a){for(var i=e.length,o=Math.floor(i/2),c=new Float32Array(r*n*4),s=a?1:0,g=0;g<n;g++)for(var h=0;h<r;h++){for(var k=g,f=h,u=4*(g*r+h),l=0,m=0,d=0,v=0,p=0;p<i;p++){var y=k,w=Math.min(r-1,Math.max(0,f+p-o)),T=4*(y*r+w),x=e[p];l+=t[T]*x,m+=t[T+1]*x,d+=t[T+2]*x,v+=t[T+3]*x}c[u]=l,c[u+1]=m,c[u+2]=d,c[u+3]=v+s*(255-v)}return c},tracking.Image.verticalConvolve=function(t,r,n,e,a){for(var i=e.length,o=Math.floor(i/2),c=new Float32Array(r*n*4),s=a?1:0,g=0;g<n;g++)for(var h=0;h<r;h++){for(var k=g,f=h,u=4*(g*r+h),l=0,m=0,d=0,v=0,p=0;p<i;p++){var y=Math.min(n-1,Math.max(0,k+p-o)),w=f,T=4*(y*r+w),x=e[p];l+=t[T]*x,m+=t[T+1]*x,d+=t[T+2]*x,v+=t[T+3]*x}c[u]=l,c[u+1]=m,c[u+2]=d,c[u+3]=v+s*(255-v)}return c},tracking.Image.separableConvolve=function(t,r,n,e,a,i){var o=this.verticalConvolve(t,r,n,a,i);return this.horizontalConvolve(o,r,n,e,i)},tracking.Image.sobel=function(t,r,n){t=this.grayscale(t,r,n,!0);for(var e=new Float32Array(r*n*4),a=new Float32Array([-1,0,1]),i=new Float32Array([1,2,1]),o=this.separableConvolve(t,r,n,a,i),c=this.separableConvolve(t,r,n,i,a),s=0;s<e.length;s+=4){var g=o[s],h=c[s],k=Math.sqrt(h*h+g*g);e[s]=k,e[s+1]=k,e[s+2]=k,e[s+3]=255}return e},tracking.Image.equalizeHist=function(t,r,n){for(var e=new Uint8ClampedArray(t.length),a=new Array(256),i=0;i<256;i++)a[i]=0;for(var i=0;i<t.length;i++)e[i]=t[i],a[t[i]]++;for(var o=a[0],i=0;i<256;i++)a[i]+=o,o=a[i];for(var c=255/t.length,i=0;i<t.length;i++)e[i]=a[t[i]]*c+.5|0;return e}}(),function(){tracking.ViolaJones={},tracking.ViolaJones.REGIONS_OVERLAP=.5,tracking.ViolaJones.classifiers={},tracking.ViolaJones.detect=function(t,r,n,e,a,i,o,c){var s,g=0,h=[],k=new Int32Array(r*n),f=new Int32Array(r*n),u=new Int32Array(r*n);o>0&&(s=new Int32Array(r*n)),tracking.Image.computeIntegralImage(t,r,n,k,f,u,s);for(var l=c[0],m=c[1],d=e*a,v=d*l|0,p=d*m|0;v<r&&p<n;){for(var y=d*i+.5|0,w=0;w<n-p;w+=y)for(var T=0;T<r-v;T+=y)o>0&&this.isTriviallyExcluded(o,s,w,T,r,v,p)||this.evalStages_(c,k,f,u,w,T,r,v,p,d)&&(h[g++]={width:v,height:p,x:T,y:w});d*=a,v=d*l|0,p=d*m|0}return this.mergeRectangles_(h)},tracking.ViolaJones.isTriviallyExcluded=function(t,r,n,e,a,i,o){var c=n*a+e,s=c+i,g=c+o*a,h=g+i,k=(r[c]-r[s]-r[g]+r[h])/(i*o*255);return k<t},tracking.ViolaJones.evalStages_=function(t,r,n,e,a,i,o,c,s,g){var h=1/(c*s),k=a*o+i,f=k+c,u=k+s*o,l=u+c,m=(r[k]-r[f]-r[u]+r[l])*h,d=(n[k]-n[f]-n[u]+n[l])*h-m*m,v=1;d>0&&(v=Math.sqrt(d));for(var p=t.length,y=2;y<p;){for(var w=0,T=t[y++],x=t[y++];x--;){for(var M=0,_=t[y++],C=t[y++],E=0;E<C;E++){var F,B,L,S,A=i+t[y++]*g+.5|0,I=a+t[y++]*g+.5|0,R=t[y++]*g+.5|0,b=t[y++]*g+.5|0,D=t[y++];_?(F=A-b+R+(I+R+b-1)*o,B=A+(I-1)*o,L=A-b+(I+b-1)*o,S=A+R+(I+R-1)*o,M+=(e[F]+e[B]-e[L]-e[S])*D):(F=I*o+A,B=F+R,L=F+b*o,S=L+R,M+=(r[F]-r[B]-r[L]+r[S])*D)}var O=t[y++],N=t[y++],j=t[y++];w+=M*h<O*v?N:j}if(w<T)return!1}return!0},tracking.ViolaJones.mergeRectangles_=function(t){for(var r=new tracking.DisjointSet(t.length),n=0;n<t.length;n++)for(var e=t[n],a=0;a<t.length;a++){var i=t[a];if(tracking.Math.intersectRect(e.x,e.y,e.x+e.width,e.y+e.height,i.x,i.y,i.x+i.width,i.y+i.height)){var o=Math.max(e.x,i.x),c=Math.max(e.y,i.y),s=Math.min(e.x+e.width,i.x+i.width),g=Math.min(e.y+e.height,i.y+i.height),h=(o-s)*(c-g),k=e.width*e.height,f=i.width*i.height;h/(k*(k/f))>=this.REGIONS_OVERLAP&&h/(f*(k/f))>=this.REGIONS_OVERLAP&&r.union(n,a)}}for(var u={},l=0;l<r.length;l++){var m=r.find(l);u[m]?(u[m].total++,u[m].width+=t[l].width,u[m].height+=t[l].height,u[m].x+=t[l].x,u[m].y+=t[l].y):u[m]={total:1,width:t[l].width,height:t[l].height,x:t[l].x,y:t[l].y}}var d=[];return Object.keys(u).forEach(function(t){var r=u[t];d.push({total:r.total,width:r.width/r.total+.5|0,height:r.height/r.total+.5|0,x:r.x/r.total+.5|0,y:r.y/r.total+.5|0})}),d}}(),function(){tracking.Brief={},tracking.Brief.N=512,tracking.Brief.randomImageOffsets_={},tracking.Brief.randomWindowOffsets_=null,tracking.Brief.getDescriptors=function(t,r,n){for(var e=new Int32Array((n.length>>1)*(this.N>>5)),a=0,i=this.getRandomOffsets_(r),o=0,c=0;c<n.length;c+=2)for(var s=r*n[c+1]+n[c],g=0,h=0,k=this.N;h<k;h++)t[i[g++]+s]<t[i[g++]+s]&&(a|=1<<(31&h)),h+1&31||(e[o++]=a,a=0);return e},tracking.Brief.match=function(t,r,n,e){for(var a=t.length>>1,i=n.length>>1,o=new Array(a),c=0;c<a;c++){for(var s=1/0,g=0,h=0;h<i;h++){for(var k=0,f=0,u=this.N>>5;f<u;f++)k+=tracking.Math.hammingWeight(r[c*u+f]^e[h*u+f]);k<s&&(s=k,g=h)}o[c]={index1:c,index2:g,keypoint1:[t[2*c],t[2*c+1]],keypoint2:[n[2*g],n[2*g+1]],confidence:1-s/this.N}}return o},tracking.Brief.reciprocalMatch=function(t,r,n,e){var a=[];if(0===t.length||0===n.length)return a;for(var i=tracking.Brief.match(t,r,n,e),o=tracking.Brief.match(n,e,t,r),c=0;c<i.length;c++)o[i[c].index2].index2===c&&a.push(i[c]);return a},tracking.Brief.getRandomOffsets_=function(t){if(!this.randomWindowOffsets_){for(var r=0,n=new Int32Array(4*this.N),e=0;e<this.N;e++)n[r++]=Math.round(tracking.Math.uniformRandom(-15,16)),n[r++]=Math.round(tracking.Math.uniformRandom(-15,16)),n[r++]=Math.round(tracking.Math.uniformRandom(-15,16)),n[r++]=Math.round(tracking.Math.uniformRandom(-15,16));this.randomWindowOffsets_=n}if(!this.randomImageOffsets_[t]){for(var a=0,i=new Int32Array(2*this.N),o=0;o<this.N;o++)i[a++]=this.randomWindowOffsets_[4*o]*t+this.randomWindowOffsets_[4*o+1],i[a++]=this.randomWindowOffsets_[4*o+2]*t+this.randomWindowOffsets_[4*o+3];this.randomImageOffsets_[t]=i}return this.randomImageOffsets_[t]}}(),function(){tracking.Fast={},tracking.Fast.THRESHOLD=40,tracking.Fast.circles_={},tracking.Fast.findCorners=function(t,r,n,e){var a=this.getCircleOffsets_(r),i=new Int32Array(16),o=[];void 0===e&&(e=this.THRESHOLD);for(var c=3;c<n-3;c++)for(var s=3;s<r-3;s++){for(var g=c*r+s,h=t[g],k=0;k<16;k++)i[k]=t[g+a[k]];this.isCorner(h,i,e)&&(o.push(s,c),s+=3)}return o},tracking.Fast.isBrighter=function(t,r,n){return t-r>n},tracking.Fast.isCorner=function(t,r,n){if(this.isTriviallyExcluded(r,t,n))return!1;for(var e=0;e<16;e++){for(var a=!0,i=!0,o=0;o<9;o++){var c=r[e+o&15];if(!this.isBrighter(t,c,n)&&(i=!1,a===!1))break;if(!this.isDarker(t,c,n)&&(a=!1,i===!1))break}if(i||a)return!0}return!1},tracking.Fast.isDarker=function(t,r,n){return r-t>n},tracking.Fast.isTriviallyExcluded=function(t,r,n){var e=0,a=t[8],i=t[12],o=t[4],c=t[0];return this.isBrighter(c,r,n)&&e++,this.isBrighter(o,r,n)&&e++,this.isBrighter(a,r,n)&&e++,this.isBrighter(i,r,n)&&e++,e<3&&(e=0,this.isDarker(c,r,n)&&e++,this.isDarker(o,r,n)&&e++,this.isDarker(a,r,n)&&e++,this.isDarker(i,r,n)&&e++,e<3)},tracking.Fast.getCircleOffsets_=function(t){if(this.circles_[t])return this.circles_[t];var r=new Int32Array(16);return r[0]=-t-t-t,r[1]=r[0]+1,r[2]=r[1]+t+1,r[3]=r[2]+t+1,r[4]=r[3]+t,r[5]=r[4]+t,r[6]=r[5]+t-1,r[7]=r[6]+t-1,r[8]=r[7]-1,r[9]=r[8]-1,r[10]=r[9]-t-1,r[11]=r[10]-t-1,r[12]=r[11]-t,r[13]=r[12]-t,r[14]=r[13]-t+1,r[15]=r[14]-t+1,this.circles_[t]=r,r}}(),function(){tracking.Math={},tracking.Math.distance=function(t,r,n,e){var a=n-t,i=e-r;return Math.sqrt(a*a+i*i)},tracking.Math.hammingWeight=function(t){return t-=t>>1&1431655765,t=(858993459&t)+(t>>2&858993459),16843009*(t+(t>>4)&252645135)>>24},tracking.Math.uniformRandom=function(t,r){return t+Math.random()*(r-t)},tracking.Math.intersectRect=function(t,r,n,e,a,i,o,c){return!(a>n||o<t||i>e||c<r)}}(),function(){tracking.Matrix={},tracking.Matrix.forEach=function(t,r,n,e,a){a=a||1;for(var i=0;i<n;i+=a)for(var o=0;o<r;o+=a){var c=i*r*4+4*o;e.call(this,t[c],t[c+1],t[c+2],t[c+3],c,i,o)}},tracking.Matrix.sub=function(t,r){for(var n=tracking.Matrix.clone(t),e=0;e<n.length;e++)for(var a=0;a<n[e].length;a++)n[e][a]-=r[e][a];return n},tracking.Matrix.add=function(t,r){for(var n=tracking.Matrix.clone(t),e=0;e<n.length;e++)for(var a=0;a<n[e].length;a++)n[e][a]+=r[e][a];return n},tracking.Matrix.clone=function(t,r,n){r=r||t[0].length,n=n||t.length;for(var e=new Array(n),a=n;a--;){e[a]=new Array(r);for(var i=r;i--;)e[a][i]=t[a][i]}return e},tracking.Matrix.mulScalar=function(t,r){for(var n=tracking.Matrix.clone(r),e=0;e<r.length;e++)for(var a=0;a<r[e].length;a++)n[e][a]*=t;return n},tracking.Matrix.transpose=function(t){for(var r=new Array(t[0].length),n=0;n<t[0].length;n++){r[n]=new Array(t.length);for(var e=0;e<t.length;e++)r[n][e]=t[e][n]}return r},tracking.Matrix.mul=function(t,r){for(var n=new Array(t.length),e=0;e<t.length;e++){n[e]=new Array(r[0].length);for(var a=0;a<r[0].length;a++){n[e][a]=0;for(var i=0;i<t[0].length;i++)n[e][a]+=t[e][i]*r[i][a]}}return n},tracking.Matrix.norm=function(t){for(var r=0,n=0;n<t.length;n++)for(var e=0;e<t[n].length;e++)r+=t[n][e]*t[n][e];return Math.sqrt(r)},tracking.Matrix.calcCovarMatrix=function(t){for(var r=new Array(t.length),n=0;n<t.length;n++){r[n]=[0];for(var e=0;e<t[n].length;e++)r[n][0]+=t[n][e]/t[n].length}for(var a=tracking.Matrix.clone(r),n=0;n<a.length;n++)for(var e=0;e<t[0].length-1;e++)a[n].push(a[n][0]);var i=tracking.Matrix.sub(t,a),o=tracking.Matrix.transpose(i),c=tracking.Matrix.mul(o,i);return[c,r]}}(),function(){tracking.EPnP={},tracking.EPnP.solve=function(t,r,n){}}(),function(){tracking.Tracker=function(){tracking.Tracker.base(this,"constructor")},tracking.inherits(tracking.Tracker,tracking.EventEmitter),tracking.Tracker.prototype.track=function(){}}(),function(){tracking.TrackerTask=function(t){if(tracking.TrackerTask.base(this,"constructor"),!t)throw new Error("Tracker instance not specified.");this.setTracker(t)},tracking.inherits(tracking.TrackerTask,tracking.EventEmitter),tracking.TrackerTask.prototype.tracker_=null,tracking.TrackerTask.prototype.running_=!1,tracking.TrackerTask.prototype.getTracker=function(){return this.tracker_},tracking.TrackerTask.prototype.inRunning=function(){return this.running_},tracking.TrackerTask.prototype.setRunning=function(t){this.running_=t},tracking.TrackerTask.prototype.setTracker=function(t){this.tracker_=t},tracking.TrackerTask.prototype.run=function(){var t=this;if(!this.inRunning())return this.setRunning(!0),this.reemitTrackEvent_=function(r){t.emit("track",r)},this.tracker_.on("track",this.reemitTrackEvent_),this.emit("run"),this},tracking.TrackerTask.prototype.stop=function(){if(this.inRunning())return this.setRunning(!1),this.emit("stop"),this.tracker_.removeListener("track",this.reemitTrackEvent_),this}}(),function(){tracking.ColorTracker=function(t){tracking.ColorTracker.base(this,"constructor"),"string"==typeof t&&(t=[t]),t&&(t.forEach(function(t){if(!tracking.ColorTracker.getColor(t))throw new Error('Color not valid, try `new tracking.ColorTracker("magenta")`.')}),this.setColors(t))},tracking.inherits(tracking.ColorTracker,tracking.Tracker),tracking.ColorTracker.knownColors_={},tracking.ColorTracker.neighbours_={},tracking.ColorTracker.registerColor=function(t,r){tracking.ColorTracker.knownColors_[t]=r},tracking.ColorTracker.getColor=function(t){return tracking.ColorTracker.knownColors_[t]},tracking.ColorTracker.prototype.colors=["magenta"],tracking.ColorTracker.prototype.minDimension=20,tracking.ColorTracker.prototype.maxDimension=1/0,tracking.ColorTracker.prototype.minGroupSize=30,tracking.ColorTracker.prototype.calculateDimensions_=function(t,r){for(var n=-1,e=-1,a=1/0,i=1/0,o=0;o<r;o+=2){var c=t[o],s=t[o+1];c<a&&(a=c),c>n&&(n=c),s<i&&(i=s),s>e&&(e=s)}return{width:n-a,height:e-i,x:a,y:i}},tracking.ColorTracker.prototype.getColors=function(){return this.colors},tracking.ColorTracker.prototype.getMinDimension=function(){return this.minDimension},tracking.ColorTracker.prototype.getMaxDimension=function(){return this.maxDimension},tracking.ColorTracker.prototype.getMinGroupSize=function(){return this.minGroupSize},tracking.ColorTracker.prototype.getNeighboursForWidth_=function(t){if(tracking.ColorTracker.neighbours_[t])return tracking.ColorTracker.neighbours_[t];var r=new Int32Array(8);return r[0]=4*-t,r[1]=4*-t+4,r[2]=4,r[3]=4*t+4,r[4]=4*t,r[5]=4*t-4,r[6]=-4,r[7]=4*-t-4,tracking.ColorTracker.neighbours_[t]=r,r},tracking.ColorTracker.prototype.mergeRectangles_=function(t){for(var r,n=[],e=this.getMinDimension(),a=this.getMaxDimension(),i=0;i<t.length;i++){var o=t[i];r=!0;for(var c=i+1;c<t.length;c++){var s=t[c];if(tracking.Math.intersectRect(o.x,o.y,o.x+o.width,o.y+o.height,s.x,s.y,s.x+s.width,s.y+s.height)){r=!1;var g=Math.min(o.x,s.x),h=Math.min(o.y,s.y),k=Math.max(o.x+o.width,s.x+s.width),f=Math.max(o.y+o.height,s.y+s.height);s.height=f-h,s.width=k-g,s.x=g,s.y=h;break}}r&&o.width>=e&&o.height>=e&&o.width<=a&&o.height<=a&&n.push(o)}return n},tracking.ColorTracker.prototype.setColors=function(t){this.colors=t},tracking.ColorTracker.prototype.setMinDimension=function(t){this.minDimension=t},tracking.ColorTracker.prototype.setMaxDimension=function(t){this.maxDimension=t},tracking.ColorTracker.prototype.setMinGroupSize=function(t){this.minGroupSize=t},tracking.ColorTracker.prototype.track=function(t,r,n){var e=this,a=this.getColors();if(!a)throw new Error('Colors not specified, try `new tracking.ColorTracker("magenta")`.');var i=[];a.forEach(function(a){i=i.concat(e.trackColor_(t,r,n,a))}),this.emit("track",{data:i})},tracking.ColorTracker.prototype.trackColor_=function(n,e,a,i){var o,c,s,g,h,k=tracking.ColorTracker.knownColors_[i],f=new Int32Array(n.length>>2),u=new Int8Array(n.length),l=this.getMinGroupSize(),m=this.getNeighboursForWidth_(e),d=new Int32Array(n.length),v=[],p=-4;if(!k)return v;for(var y=0;y<a;y++)for(var w=0;w<e;w++)if(p+=4,!u[p]){for(o=0,h=-1,d[++h]=p,d[++h]=y,d[++h]=w,u[p]=1;h>=0;)if(s=d[h--],c=d[h--],g=d[h--],k(n[g],n[g+1],n[g+2],n[g+3],g,c,s)){f[o++]=s,f[o++]=c;for(var T=0;T<m.length;T++){var x=g+m[T],M=c+t[T],_=s+r[T];!u[x]&&M>=0&&M<a&&_>=0&&_<e&&(d[++h]=x,d[++h]=M,d[++h]=_,u[x]=1)}}if(o>=l){var C=this.calculateDimensions_(f,o);C&&(C.color=i,v.push(C))}}return this.mergeRectangles_(v)},tracking.ColorTracker.registerColor("cyan",function(t,r,n){var e=50,a=70,i=t-0,o=r-255,c=n-255;return r-t>=e&&n-t>=a||i*i+o*o+c*c<6400}),tracking.ColorTracker.registerColor("magenta",function(t,r,n){var e=50,a=t-255,i=r-0,o=n-255;return t-r>=e&&n-r>=e||a*a+i*i+o*o<19600}),tracking.ColorTracker.registerColor("yellow",function(t,r,n){var e=50,a=t-255,i=r-255,o=n-0;return t-n>=e&&r-n>=e||a*a+i*i+o*o<1e4});var t=new Int32Array([-1,-1,0,1,1,1,0,-1]),r=new Int32Array([0,1,1,1,0,-1,-1,-1])}(),function(){tracking.ObjectTracker=function(t){tracking.ObjectTracker.base(this,"constructor"),t&&(Array.isArray(t)||(t=[t]),Array.isArray(t)&&t.forEach(function(r,n){if("string"==typeof r&&(t[n]=tracking.ViolaJones.classifiers[r]),!t[n])throw new Error('Object classifier not valid, try `new tracking.ObjectTracker("face")`.')})),this.setClassifiers(t)},tracking.inherits(tracking.ObjectTracker,tracking.Tracker),tracking.ObjectTracker.prototype.edgesDensity=.2,tracking.ObjectTracker.prototype.initialScale=1,tracking.ObjectTracker.prototype.scaleFactor=1.25,tracking.ObjectTracker.prototype.stepSize=1.5,tracking.ObjectTracker.prototype.getClassifiers=function(){return this.classifiers},tracking.ObjectTracker.prototype.getEdgesDensity=function(){return this.edgesDensity},tracking.ObjectTracker.prototype.getInitialScale=function(){return this.initialScale},tracking.ObjectTracker.prototype.getScaleFactor=function(){return this.scaleFactor},tracking.ObjectTracker.prototype.getStepSize=function(){return this.stepSize},tracking.ObjectTracker.prototype.track=function(t,r,n){var e=this,a=this.getClassifiers();if(!a)throw new Error('Object classifier not specified, try `new tracking.ObjectTracker("face")`.');var i=[];a.forEach(function(a){i=i.concat(tracking.ViolaJones.detect(t,r,n,e.getInitialScale(),e.getScaleFactor(),e.getStepSize(),e.getEdgesDensity(),a))}),this.emit("track",{data:i})},tracking.ObjectTracker.prototype.setClassifiers=function(t){this.classifiers=t},tracking.ObjectTracker.prototype.setEdgesDensity=function(t){this.edgesDensity=t},tracking.ObjectTracker.prototype.setInitialScale=function(t){this.initialScale=t},tracking.ObjectTracker.prototype.setScaleFactor=function(t){this.scaleFactor=t},tracking.ObjectTracker.prototype.setStepSize=function(t){this.stepSize=t}}(),function(){tracking.LandmarksTracker=function(){tracking.LandmarksTracker.base(this,"constructor")},tracking.inherits(tracking.LandmarksTracker,tracking.ObjectTracker),tracking.LandmarksTracker.prototype.track=function(t,r,n){var e=tracking.ViolaJones.classifiers.face,a=tracking.ViolaJones.detect(t,r,n,this.getInitialScale(),this.getScaleFactor(),this.getStepSize(),this.getEdgesDensity(),e),i=tracking.LBF.align(t,r,n,a);this.emit("track",{data:{faces:a,landmarks:i}})}}(),function(){tracking.LBF={},tracking.LBF.Regressor=function(t){this.maxNumStages=t,this.rfs=new Array(t),this.models=new Array(t);for(var r=0;r<t;r++)this.rfs[r]=new tracking.LBF.RandomForest(r),this.models[r]=tracking.LBF.RegressorData[r].models;this.meanShape=tracking.LBF.LandmarksData},tracking.LBF.Regressor.prototype.predict=function(t,r,n,e){var a=[],i=[],o=[],c=tracking.Matrix.clone(this.meanShape);a.push({data:t,width:r,height:n}),o.push(e),i.push(tracking.LBF.projectShapeToBoundingBox_(c,e));for(var s=0;s<this.maxNumStages;s++){var g=tracking.LBF.Regressor.deriveBinaryFeat(this.rfs[s],a,i,o,c);this.applyGlobalPrediction(g,this.models[s],i,o)}return i[0]},tracking.LBF.Regressor.prototype.applyGlobalPrediction=function(t,r,n,e){for(var a=2*n[0].length,i=new Array(a/2),o=0;o<a/2;o++)i[o]=[0,0];for(var o=0;o<n.length;o++){for(var c=0;c<a;c++){for(var s=0,g=0,h=0;(h=t[o][g].index)!=-1;g++)h<=r[c].nr_feature&&(s+=r[c].data[h-1]*t[o][g].value);c<a/2?i[c][0]=s:i[c-a/2][1]=s}var k=tracking.LBF.similarityTransform_(tracking.LBF.unprojectShapeToBoundingBox_(n[o],e[o]),this.meanShape),f=(tracking.Matrix.transpose(k[0]),tracking.LBF.unprojectShapeToBoundingBox_(n[o],e[o]));f=tracking.Matrix.add(f,i),n[o]=tracking.LBF.projectShapeToBoundingBox_(f,e[o])}},tracking.LBF.Regressor.deriveBinaryFeat=function(t,r,n,e,a){for(var i=new Array(r.length),o=0;o<r.length;o++){var c=t.maxNumTrees*t.landmarkNum+1;i[o]=new Array(c);for(var s=0;s<c;s++)i[o][s]={}}for(var g=1<<t.maxDepth-1,o=0;o<r.length;o++){for(var h=tracking.LBF.unprojectShapeToBoundingBox_(n[o],e[o]),k=tracking.LBF.similarityTransform_(h,a),s=0;s<t.landmarkNum;s++)for(var f=0;f<t.maxNumTrees;f++){var u=tracking.LBF.Regressor.getCodeFromTree(t.rfs[s][f],r[o],n[o],e[o],k[0],k[1]),l=s*t.maxNumTrees+f;i[o][l].index=g*l+u,i[o][l].value=1}i[o][t.landmarkNum*t.maxNumTrees].index=-1,i[o][t.landmarkNum*t.maxNumTrees].value=-1}return i},tracking.LBF.Regressor.getCodeFromTree=function(t,r,n,e,a,i){for(var o=0,c=0;;){var s=Math.cos(t.nodes[o].feats[0])*t.nodes[o].feats[2]*t.maxRadioRadius*e.width,g=Math.sin(t.nodes[o].feats[0])*t.nodes[o].feats[2]*t.maxRadioRadius*e.height,h=Math.cos(t.nodes[o].feats[1])*t.nodes[o].feats[3]*t.maxRadioRadius*e.width,k=Math.sin(t.nodes[o].feats[1])*t.nodes[o].feats[3]*t.maxRadioRadius*e.height,f=a[0][0]*s+a[0][1]*g,u=a[1][0]*s+a[1][1]*g,l=Math.floor(f+n[t.landmarkID][0]),m=Math.floor(u+n[t.landmarkID][1]);l=Math.max(0,Math.min(l,r.height-1)),m=Math.max(0,Math.min(m,r.width-1));var d=a[0][0]*h+a[0][1]*k,v=a[1][0]*h+a[1][1]*k,p=Math.floor(d+n[t.landmarkID][0]),y=Math.floor(v+n[t.landmarkID][1]);p=Math.max(0,Math.min(p,r.height-1)),y=Math.max(0,Math.min(y,r.width-1));var w=Math.floor(r.data[m*r.width+l])-Math.floor(r.data[y*r.width+p]);if(o=w<t.nodes[o].thresh?t.nodes[o].cnodes[0]:t.nodes[o].cnodes[1],1==t.nodes[o].is_leafnode){c=1;for(var T=0;T<t.leafnodes.length;T++){if(t.leafnodes[T]==o)return c;c++}return c}}return c}}(),function(){tracking.LBF.maxNumStages=4,tracking.LBF.regressor_=null,tracking.LBF.align=function(t,r,n,e){null==tracking.LBF.regressor_&&(tracking.LBF.regressor_=new tracking.LBF.Regressor(tracking.LBF.maxNumStages)),t=tracking.Image.grayscale(t,r,n,!1),t=tracking.Image.equalizeHist(t,r,n);var a=new Array(e.length);for(var i in e){e[i].height=e[i].width;var o={};o.startX=e[i].x,o.startY=e[i].y,o.width=e[i].width,o.height=e[i].height,a[i]=tracking.LBF.regressor_.predict(t,r,n,o)}return a},tracking.LBF.unprojectShapeToBoundingBox_=function(t,r){for(var n=new Array(t.length),e=0;e<t.length;e++)n[e]=[(t[e][0]-r.startX)/r.width,(t[e][1]-r.startY)/r.height];return n},tracking.LBF.projectShapeToBoundingBox_=function(t,r){for(var n=new Array(t.length),e=0;e<t.length;e++)n[e]=[t[e][0]*r.width+r.startX,t[e][1]*r.height+r.startY];return n},tracking.LBF.similarityTransform_=function(t,r){for(var n=[0,0],e=[0,0],a=0;a<t.length;a++)n[0]+=t[a][0],n[1]+=t[a][1],e[0]+=r[a][0],e[1]+=r[a][1];n[0]/=t.length,n[1]/=t.length,e[0]/=r.length,e[1]/=r.length;for(var i=tracking.Matrix.clone(t),o=tracking.Matrix.clone(r),a=0;a<t.length;a++)i[a][0]-=n[0],i[a][1]-=n[1],o[a][0]-=e[0],o[a][1]-=e[1];var c,s,g,h,k=tracking.Matrix.calcCovarMatrix(i);c=k[0],g=k[1],k=tracking.Matrix.calcCovarMatrix(o),s=k[0],h=k[1];var f=Math.sqrt(tracking.Matrix.norm(c)),u=Math.sqrt(tracking.Matrix.norm(s)),l=f/u;i=tracking.Matrix.mulScalar(1/f,i),o=tracking.Matrix.mulScalar(1/u,o);for(var m=0,d=0,a=0;a<t.length;a++)m=m+i[a][1]*o[a][0]-i[a][0]*o[a][1],d=d+i[a][0]*o[a][0]+i[a][1]*o[a][1];var v=Math.sqrt(m*m+d*d),p=m/v,y=d/v,w=[[y,-p],[p,y]];return[w,l]},tracking.LBF.RandomForest=function(t){this.maxNumTrees=tracking.LBF.RegressorData[t].max_numtrees,this.landmarkNum=tracking.LBF.RegressorData[t].num_landmark,this.maxDepth=tracking.LBF.RegressorData[t].max_depth,this.stages=tracking.LBF.RegressorData[t].stages,this.rfs=new Array(this.landmarkNum);for(var r=0;r<this.landmarkNum;r++){this.rfs[r]=new Array(this.maxNumTrees);for(var n=0;n<this.maxNumTrees;n++)this.rfs[r][n]=new tracking.LBF.Tree(t,r,n)}},tracking.LBF.Tree=function(t,r,n){var e=tracking.LBF.RegressorData[t].landmarks[r][n];this.maxDepth=e.max_depth,this.maxNumNodes=e.max_numnodes,this.nodes=e.nodes,this.landmarkID=e.landmark_id,this.numLeafnodes=e.num_leafnodes,this.numNodes=e.num_nodes,this.maxNumFeats=e.max_numfeats,this.maxRadioRadius=e.max_radio_radius,this.leafnodes=e.id_leafnodes}}();
    9.