murat-aka
commented
6 years ago Need to explain bit more mate.
a. What will you detect b. Have you experienced with the library yet.
Open FritzAgency opened 6 years ago
murat-aka
commented
6 years ago Need to explain bit more mate.
a. What will you detect b. Have you experienced with the library yet.
FritzAgency
commented
6 years ago @murat-aka
a. I want to calculate the total surface covered by a color(I'm experiencing with red color) throughout a period of time.
b. I have experienced with the library.
I hope you get what am trying to achieve.
murat-aka
commented
6 years ago You can get the height and width of the rectangle As below
event.data.forEach(function(rect) {
console.log(rect.x, rect.y, rect.height, rect.width, rect.color);
});
}
});Set a global variable for count and area. When you detect an area count should go up
FritzAgency
commented
6 years ago @murat-aka Can you please give me a view on how to achieve your last sentence
Set a global variable for count and area. When you detect an area count should go up
How do I set a global variable for count and area?
How to show the real-time area count of the color?
Will I change rect.color to my preferred color. If yes, how?
I will appreciate it If you can put me through.
Thank you!
murat-aka
commented
6 years ago Rect colour tells you what color is detected Try below. Though I haven't tested it.
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>tracking.js - color hello world</title>
<link rel="stylesheet" href="assets/demo.css">
<script src="../build/tracking-min.js"></script>
<style>
.rect {
width: 80px;
height: 80px;
position: absolute;
left: -1000px;
top: -1000px;
}
</style>
</head>
<body>
<div class="demo-title">
<p><a href="http://trackingjs.com" target="_parent">tracking.js</a> － detect certain colors in a image</p>
</div>
<div class="demo-frame">
<div id="counter_div">
Area
</div>
<div class="demo-container">
<img id="img" src="assets/psmove.png" />
</div>
</div>
<script>
window.onload = function() {
var img = document.getElementById('img');
var demoContainer = document.querySelector('.demo-container');
var tracker = new tracking.ColorTracker(['magenta', 'cyan', 'yellow']);
var count =0;
var div_counter = document.getElementById('counter_div');
tracker.on('track', function(event) {
if (event.data.length === 0) {
// No colors were detected in this frame
div_counter.innerHTML= count;
} else {
count++;
div_counter.innerHTML= count;
event.data.forEach(function(rect) {
window.plot(rect.x, rect.y, rect.width, rect.height, rect.color);
});
}
});
// }); Update, now tested, this code works, this line needed comment out, as it was preventing code running
tracking.track('#img', tracker);
window.plot = function(x, y, w, h, color) {
var rect = document.createElement('div');
document.querySelector('.demo-container').appendChild(rect);
rect.classList.add('rect');
rect.style.border = '2px solid ' + color;
rect.style.width = w + 'px';
rect.style.height = h + 'px';
rect.style.left = (img.offsetLeft + x) + 'px';
rect.style.top = (img.offsetTop + y) + 'px';
// Real-time area;
rect.innerHTML = h*w;
};
};
</script>
</body>
</html>
Here is the code. I'm currently using.
How can I apply it to what you posted above?
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>tracking.js - color with camera</title>
<link rel="stylesheet" href="assets/demo.css">
<script src="../build/tracking-min.js"></script>
<script src="../build/build2/dat.gui.min.js"></script>
<!--script src="../node_modules/dat.gui/build2/dat.gui.min.js"></script-->
<script src="assets/stats.min.js"></script>
<script src="assets/color_camera_gui.js"></script>
<style>
video, canvas {
margin-left: 100px;
margin-top: 35px;
position: absolute;
}
</style>
</head>
<body>
<div class="demo-title">
<p><a href="http://trackingjs.com" target="_parent">tracking.js</a> － choose the colors you want to detect through the controls on the right</p>
</div>
<div class="demo-frame">
<div class="demo-container">
<video id="video" width="600" height="450" camera="true" preload autoplay loop muted controls></video>
<canvas id="canvas" width="600" height="450"></canvas>
</div>
</div>
<script>
window.onload = function() {
var video = document.getElementById('video');
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var tracker = new tracking.ColorTracker();
tracking.track('#video', tracker, { camera: true });
tracking.ColorTracker.registerColor('green', function(r, g, b) {
if (r < 50 && g > 200 && b < 50) {
return true;
}
return false;
});
tracking.ColorTracker.registerColor('red', function(r, g, b) {
if (r < 255 && g > 0 && b < 0) {
return true;
}
return false;
});
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>@murat-aka Thanks for the help so far.
FritzAgency
commented
6 years ago @murat-aka Your example is using image but what I wanted to use is a video. I'm using color camera https://trackingjs.com/examples/color_camera.html
Hello, nice work on the tracking.js library. I'm currently using the color camera for a project to detect 2 colors in a video and show the number of times they appear after the video stopped in a specific time frame. I'm in need of a guide to make this happen using this library. Thank you.