tracking
Version:
A modern approach for Computer Vision on the web.
90 lines (72 loc) • 2.59 kB
HTML
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<title>tracking.js - face tracking fish tank</title>
<link rel="stylesheet" href="assets/demo.css">
<script src="../build/tracking-min.js"></script>
<script src="../build/data/face-min.js"></script>
<script src="../../threejs/build/three.min.js"></script>
<script src="assets/fish_tank/FishTankRenderer.js"></script>
<style>
body {
overflow: hidden;
}
#video, #canvas {
bottom: 0;
position: absolute;
z-index: 100;
}
#viewport {
padding-top: 40px;
}
</style>
</head>
<body>
<div class="demo-title">
<p><a href="http://trackingjs.com" target="_parent">tracking.js</a> － get user's webcam and detect faces to control the scene</p>
</div>
<div id="viewport">
<video id="video" width="320" height="240" preload autoplay loop muted></video>
<canvas id="canvas" width="320" height="240"></canvas>
</div>
<script>
var viewport = document.getElementById('viewport');
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var fishTankRenderer = new FishTankRenderer();
fishTankRenderer.init(viewport);
var faceX = 0;
var faceY = 0;
var tracker = new tracking.ObjectTracker('face');
tracker.setInitialScale(4);
tracker.setStepSize(2);
tracking.track('#video', tracker, { camera: true });
tracker.on('track', function(event) {
var maxRectArea = 0;
var maxRect;
event.data.forEach(function(rect) {
if (rect.width * rect.height > maxRectArea){
maxRectArea = rect.width * rect.height;
maxRect = rect;
}
context.clearRect(0, 0, canvas.width, canvas.height);
context.strokeStyle = 'magenta';
context.strokeRect(rect.x, rect.y, rect.width, rect.height);
context.font = '11px Helvetica';
context.fillStyle = "#fff";
context.fillText('x: ' + rect.x + 'px', rect.x + rect.width + 5, rect.y + 11);
context.fillText('y: ' + rect.y + 'px', rect.x + rect.width + 5, rect.y + 22);
});
if(maxRectArea > 0) {
var rectCenterX = maxRect.x + (maxRect.width/2);
var rectCenterY = maxRect.y + (maxRect.height/2);
faceX = (rectCenterX - 160) * (window.innerWidth/320) * 50;
faceY = (rectCenterY - 120) * (window.innerHeight/240) * 50;
}
fishTankRenderer.render(faceX, faceY);
});
</script>
</body>
</html>