how to know which of the classifier was detected?

how to know which classifier was detected? I need these classifiers which violates jones / tracking this by detecting the image. how can I do to find out

Queria saber como descobrir qual dos classificadores esta sendo detectado, como posso fazer isso?
`var img = document.getElementById('srcImage');

var tracker = new tracking.ObjectTracker(['face']);
tracker.setStepSize(1.7);

tracking.track('#srcImage', tracker, {onFound:function(){
alert('re');
}});

tracker.on('track', function(event) {
console.log(event)
event.data.forEach(function(rect) {
window.plot(rect.x, rect.y, rect.width, rect.height);
alert(event.classifier);
});
});

window.plot = function(x, y, w, h) {
var rect = document.createElement('div');
document.querySelector('.image').appendChild(rect);
rect.classList.add('rect');
rect.style.width = w + 'px';
rect.style.height = h + 'px';
rect.style.left = (img.offsetLeft + x) + 'px';
rect.style.top = (img.offsetTop + y) + 'px';
};

};`

Start with the tracking.ObjectTracker setup and the tracker.on('track') handler shown in the issue, then inspect how the track event exposes event.data and event.classifier. The work is done when the supported way to identify the detected classifier is established and documented or the requested behavior is clearly scoped.