tracking
Version:
A modern approach for Computer Vision on the web.
83 lines (68 loc) • 2.35 kB
HTML
<html>
<head>
<meta charset="utf-8">
<title>tracking.js - color with video</title>
<link rel="stylesheet" href="assets/demo.css">
<script src="../build/tracking-min.js"></script>
<script src="../../dat-gui/build/dat.gui.min.js"></script>
<script src="assets/stats.min.js"></script>
<script src="assets/color_camera_gui.js"></script>
<style>
.demo-container {
background-color: black;
}
video, canvas {
position: absolute;
}
</style>
</head>
<body>
<div class="demo-title">
<p><a href="http://trackingjs.com" target="_parent">tracking.js</a> － detect certain colors in a video</p>
</div>
<div class="demo-frame">
<div class="demo-container">
<div id="rectangle"></div>
<video id="video" width="800" height="530" preload autoplay loop muted controls>
<source src="assets/minions.mp4" type="video/mp4">
<source src="assets/minions.ogv" type="video/ogg">
</video>
<canvas id="canvas" width="800" height="500"></canvas>
</div>
</div>
<script>
window.onload = function() {
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
tracking.ColorTracker.registerColor('purple', function(r, g, b) {
var dx = r - 120;
var dy = g - 60;
var dz = b - 210;
if ((b - g) >= 100 && (r - g) >= 60) {
return true;
}
return dx * dx + dy * dy + dz * dz < 3500;
});
var tracker = new tracking.ColorTracker(['yellow', 'purple']);
tracker.setMinDimension(5);
tracking.track('#video', tracker);
tracker.on('track', function(event) {
context.clearRect(0, 0, canvas.width, canvas.height);
event.data.forEach(function(rect) {
if (rect.color === 'custom') {
rect.color = tracker.customColor;
}
context.strokeStyle = rect.color;
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);
});
});
initGUIControllers(tracker);
};
</script>
</body>
</html>