forked from stemkoski/stemkoski.github.com
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathWebcam-Motion-Detection-Texture.html
326 lines (279 loc) · 9.98 KB
/
Webcam-Motion-Detection-Texture.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
<!doctype html>
<html lang="en">
<head>
<title>Webcam Motion Detection(Three.js)</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link rel=stylesheet href="css/base.css"/>
</head>
<body>
<video id="monitor" autoplay style="display:none; width: 320px; height: 240px;"></video>
<div id="canvasLayers" style="position: relative; width:320px; height:240px; float:right">
<canvas id="videoCanvas" width="320" height="240" style="z-index: 1; position: absolute; left:0px; top:0px; opacity:0.5;"></canvas>
<canvas id="layer2" width="320" height="240" style="z-index: 2; position: absolute; left:0px; top:0px; opacity:0.5;"></canvas>
</div>
<canvas id="blendCanvas" style="display: none; position: relative; left: 320px; top: 240px; width: 320px; height: 240px;"></canvas>
<div id="messageError"></div>
<div id="messageArea" style="position: relative; left: 0px; top: 270px;"></div>
<div id="container" style="z-index: 2; position: absolute; left:0px; top:0px"></div>
<script>
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
window.URL = window.URL || window.webkitURL;
var camvideo = document.getElementById('monitor');
if (!navigator.getUserMedia)
{
document.getElementById('messageError').innerHTML =
'Sorry. <code>navigator.getUserMedia()</code> is not available.';
}
navigator.getUserMedia({video: true}, gotStream, noStream);
function gotStream(stream)
{
if (window.URL)
{ camvideo.src = window.URL.createObjectURL(stream); }
else // Opera
{ camvideo.src = stream; }
camvideo.onerror = function(e)
{ stream.stop(); };
stream.onended = noStream;
}
function noStream(e)
{
var msg = 'No camera available.';
if (e.code == 1)
{ msg = 'User denied access to use camera.'; }
document.getElementById('errorMessage').textContent = msg;
}
</script>
<script src="js/Three.js"></script>
<script src="js/Detector.js"></script>
<script src="js/Stats.js"></script>
<script src="js/OrbitControls.js"></script>
<script src="js/THREEx.KeyboardState.js"></script>
<script src="js/THREEx.FullScreen.js"></script>
<script src="js/THREEx.WindowResize.js"></script>
<!-- jQuery code to display an information button and box when clicked. -->
<script src="js/jquery-1.9.1.js"></script>
<script src="js/jquery-ui.js"></script>
<link rel=stylesheet href="css/jquery-ui.css" />
<link rel=stylesheet href="css/info.css"/>
<script src="js/info.js"></script>
<div id="infoButton"></div>
<div id="infoBox" title="Demo Information">
This three.js demo is part of a collection at
<a href="http://stemkoski.github.io/Three.js/">http://stemkoski.github.io/Three.js/</a>
</div>
<!-- ------------------------------------------------------------ -->
<div id="ThreeJS" style="position: absolute; left:0px; top:0px"></div>
<script>
/*
Three.js "tutorials by example"
Author: Lee Stemkoski
Date: July 2013 (three.js v59dev)
Based on http://www.adobe.com/devnet/html5/articles/javascript-motion-detection.html
*/
// MAIN
// standard global variables
var container, scene, camera, renderer, controls, stats;
var keyboard = new THREEx.KeyboardState();
var clock = new THREE.Clock();
// custom global variables
var cube;
// assign global variables to HTML elements
var video = document.getElementById( 'monitor' );
var videoCanvas = document.getElementById( 'videoCanvas' );
var videoContext = videoCanvas.getContext( '2d' );
var layer2Canvas = document.getElementById( 'layer2' );
var layer2Context = layer2Canvas.getContext( '2d' );
var blendCanvas = document.getElementById( "blendCanvas" );
var blendContext = blendCanvas.getContext('2d');
var messageArea = document.getElementById( "messageArea" );
var buttons;
var lastImageData;
init();
animate();
// FUNCTIONS
function init()
{
// SCENE
scene = new THREE.Scene();
// CAMERA
var SCREEN_WIDTH = window.innerWidth, SCREEN_HEIGHT = window.innerHeight;
var VIEW_ANGLE = 45, ASPECT = SCREEN_WIDTH / SCREEN_HEIGHT, NEAR = 0.1, FAR = 20000;
camera = new THREE.PerspectiveCamera( VIEW_ANGLE, ASPECT, NEAR, FAR);
scene.add(camera);
camera.position.set(0,150,400);
camera.lookAt(scene.position);
// RENDERER
if ( Detector.webgl )
renderer = new THREE.WebGLRenderer( {antialias:true} );
else
renderer = new THREE.CanvasRenderer();
renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
container = document.getElementById( 'ThreeJS' );
container.appendChild( renderer.domElement );
// EVENTS
THREEx.WindowResize(renderer, camera);
THREEx.FullScreen.bindKey({ charCode : 'm'.charCodeAt(0) });
// CONTROLS
controls = new THREE.OrbitControls( camera, renderer.domElement );
// STATS
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.bottom = '0px';
stats.domElement.style.zIndex = 100;
container.appendChild( stats.domElement );
// LIGHT
var light = new THREE.PointLight(0xffffff);
light.position.set(-100,250,100);
scene.add(light);
// FLOOR
var floorTexture = new THREE.ImageUtils.loadTexture( 'images/checkerboard.jpg' );
floorTexture.wrapS = floorTexture.wrapT = THREE.RepeatWrapping;
floorTexture.repeat.set( 10, 10 );
var floorMaterial = new THREE.MeshBasicMaterial( { map: floorTexture, side: THREE.DoubleSide } );
var floorGeometry = new THREE.PlaneGeometry(1000, 1000, 10, 10);
var floor = new THREE.Mesh(floorGeometry, floorMaterial);
floor.position.y = -0.5;
floor.rotation.x = Math.PI / 2;
scene.add(floor);
// SKYBOX/FOG
scene.fog = new THREE.FogExp2( 0x9999ff, 0.00025 );
////////////
// CUSTOM //
////////////
this.colorRed = THREE.ImageUtils.loadTexture( "images/SquareRed.png" );
this.colorGreen = THREE.ImageUtils.loadTexture( "images/SquareGreen.png" );
this.colorBlue = THREE.ImageUtils.loadTexture( "images/SquareBlue.png" );
var cubeGeometry = new THREE.CubeGeometry( 50, 50, 50 );
this.cubeMaterial = new THREE.MeshLambertMaterial( { color: 0xffffff, map: colorRed, emissive: 0x333333 } );
cube = new THREE.Mesh( cubeGeometry, cubeMaterial );
cube.position.set(0,26,0);
//cube.rotation.set(Math.PI / 4, 0, 0);
scene.add(cube);
// VIDEO SET UP
// these changes are permanent
videoContext.translate(320, 0);
videoContext.scale(-1, 1);
// background color if no video present
videoContext.fillStyle = '#005337';
videoContext.fillRect( 0, 0, videoCanvas.width, videoCanvas.height );
buttons = [];
var button1 = new Image();
button1.src ="images/SquareRed.png";
var buttonData1 = { name:"red", image:button1, x:320 - 96 - 30, y:10, w:32, h:32 };
buttons.push( buttonData1 );
var button2 = new Image();
button2.src ="images/SquareGreen.png";
var buttonData2 = { name:"green", image:button2, x:320 - 64 - 20, y:10, w:32, h:32 };
buttons.push( buttonData2 );
var button3 = new Image();
button3.src ="images/SquareBlue.png";
var buttonData3 = { name:"blue", image:button3, x:320 - 32 - 10, y:10, w:32, h:32 };
buttons.push( buttonData3 );
}
function animate()
{
requestAnimationFrame( animate );
render();
update();
}
function update()
{
if ( keyboard.pressed("z") )
{
// do something
}
controls.update();
stats.update();
blend();
checkAreas();
}
function render()
{
renderer.render( scene, camera );
var delta = clock.getDelta();
cube.rotation.y += delta;
if ( video.readyState === video.HAVE_ENOUGH_DATA )
{
// mirror video
videoContext.drawImage( video, 0, 0, videoCanvas.width, videoCanvas.height );
for ( var i = 0; i < buttons.length; i++ )
layer2Context.drawImage( buttons[i].image, buttons[i].x, buttons[i].y, buttons[i].w, buttons[i].h );
}
}
function blend()
{
var width = videoCanvas.width;
var height = videoCanvas.height;
// get current webcam image data
var sourceData = videoContext.getImageData(0, 0, width, height);
// create an image if the previous image doesn’t exist
if (!lastImageData) lastImageData = videoContext.getImageData(0, 0, width, height);
// create a ImageData instance to receive the blended result
var blendedData = videoContext.createImageData(width, height);
// blend the 2 images
differenceAccuracy(blendedData.data, sourceData.data, lastImageData.data);
// draw the result in a canvas
blendContext.putImageData(blendedData, 0, 0);
// store the current webcam image
lastImageData = sourceData;
}
function differenceAccuracy(target, data1, data2)
{
if (data1.length != data2.length) return null;
var i = 0;
while (i < (data1.length * 0.25))
{
var average1 = (data1[4*i] + data1[4*i+1] + data1[4*i+2]) / 3;
var average2 = (data2[4*i] + data2[4*i+1] + data2[4*i+2]) / 3;
var diff = threshold(fastAbs(average1 - average2));
target[4*i] = diff;
target[4*i+1] = diff;
target[4*i+2] = diff;
target[4*i+3] = 0xFF;
++i;
}
}
function fastAbs(value)
{
return (value ^ (value >> 31)) - (value >> 31);
}
function threshold(value)
{
return (value > 0x15) ? 0xFF : 0;
}
// check if white region from blend overlaps area of interest (e.g. triggers)
function checkAreas()
{
for (var b = 0; b < buttons.length; b++)
{
// get the pixels in a note area from the blended image
var blendedData = blendContext.getImageData( buttons[b].x, buttons[b].y, buttons[b].w, buttons[b].h );
// calculate the average lightness of the blended data
var i = 0;
var sum = 0;
var countPixels = blendedData.data.length * 0.25;
while (i < countPixels)
{
sum += (blendedData.data[i*4] + blendedData.data[i*4+1] + blendedData.data[i*4+2]);
++i;
}
// calculate an average between of the color values of the note area [0-255]
var average = Math.round(sum / (3 * countPixels));
if (average > 50) // more than 20% movement detected
{
console.log( "Button " + buttons[b].name + " triggered." ); // do stuff
if (buttons[b].name == "red")
cubeMaterial.map = colorRed;
if (buttons[b].name == "green")
cubeMaterial.map = colorGreen;
if (buttons[b].name == "blue")
cubeMaterial.map = colorBlue;
// messageArea.innerHTML = "Button " + buttons[b].name + " triggered.";
}
// console.log("Button " + b + " average " + average);
}
}
</script>
</body>
</html>