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processingjs + webcam + frame differencing

[5 Replies]
- 08-Jan-2013 12:44 PM
- Forum: Processing with Other Languages
quite new to processingjs I try to to frame differencing from the webcam

and I get nothing !

here is "my" code, in fact a copy/paste from different sources ;)

including makio135 for the "getusermedia" part and

Golan Levin for Frame Differencing.

any help would be welcomed :)
2. <!DOCTYPE html>
3. <html>
4. <head>
5. <meta charset="utf-8">
6. <title>GetUserMedia API and ProcessingJS</title>
7. </head>
8. <body>
9. <video style="display:none;" id="videoOutput" width="500px" height="660px" autoplay></video>
10. <canvas id="output" width="500px" height="660px" align="center">
11. <p>Please upgrade your browser to something new like <a href="https://www.google.com/chrome">Google Chrome</a>.</p>
12. </canvas>
13. <script type="text/javascript" src="processing-1.4.1.js"></script>
14. <script type="text/processing" data-processing-target="output">
16. /*
17. GetUserMedia script from http://www.html5rocks.com/en/tutorials/webgl/jsartoolkit_webrtc/
18. */
19. var video = document.getElementById("videoOutput");
21. var getUserMedia = function(t, onsuccess, onerror) {
22. if (navigator.getUserMedia) {
23. return navigator.getUserMedia(t, onsuccess, onerror);
24. } else if (navigator.webkitGetUserMedia) {
25. return navigator.webkitGetUserMedia(t, onsuccess, onerror);
26. } else if (navigator.mozGetUserMedia) {
27. return navigator.mozGetUserMedia(t, onsuccess, onerror);
28. } else if (navigator.msGetUserMedia) {
29. return navigator.msGetUserMedia(t, onsuccess, onerror);
30. } else {
31. onerror(new Error("No getUserMedia implementation found."));
32. }
33. };
35. var URL = window.URL || window.webkitURL;
36. var createObjectURL = URL.createObjectURL || webkitURL.createObjectURL;
37. if (!createObjectURL) {
38. throw new Error("URL.createObjectURL not found.");
39. }
41. getUserMedia({audio:true, video:true},
42. function(stream) {
43. var url = createObjectURL(stream);
44. video.src = url;
45. },
46. function(error) {
47. alert("Couldn’t access webcam.");
48. }
49. );
51. var ctx;
52. PImage img;
53. int nb=20;
55. int numPixels;
56. int[] previousFrame;
60. void setup(){
61. size(500,660);
62. ctx = externals.context;
63. // ellipseMode(CORNER);
64. // smooth();
66. // numPixels = video.width * video.height;
67. numPixels = 500 * 660;
68. // Create an array to store the previously captured frame
69. previousFrame = new int[numPixels];
70. loadPixels();
73. }
75. void draw(){
76. pushMatrix();
77. translate(width,0);
78. scale(-1,1);//mirror the video
79. ctx.drawImage(video, 0, 0, width, height); //video is defined inside getUserMedia.js
80. popMatrix();
82. //do something
83. /* img=get();
84. img.resize(nb,nb);
85. background(255);
86. noStroke();
87. for(int j=0; j<nb; j++){
88. for(int i=0; i<nb; i++){
89. fill(img.get(i, j));
90. ellipse(i*width/nb, j*height/nb, width/nb, height/nb);
91. }
92. }
93. */
94. img=get()
95. int movementSum = 0; // Amount of movement in the frame
96. for (int i = 0; i < numPixels; i++) { // For each pixel in the video frame...
97. color currColor = img.pixels[i];
98. int Icurr=int(currColor);
99. color prevColor = previousFrame[i];
100. int Iprev =int(prevColor);
101. float diff=abs(brightness(currColor)- brightness(prevColor));
102. movementSum += diff;
103. pixels[i] = color(diff);
104. previousFrame[i] = currColor;
105. }
106. if (movementSum > 0) {
107. updatePixels();
108. //println(movementSum); // Print the total amount of movement to the console
109. }
111. }
112. </script>
113. </body>
114. </html>

webcam issue

[1 Reply]
- 09-Sep-2012 02:55 AM
- Forum: Integration and Hardware
hi

running windows XP Home Edition SP3on an old Acer Aspire 5600
processing 2.0b1
winvdig 101
quicktime 7.7.1

the webcam is working with QTCap.

But with processing, the exemple GettinGStartedCapture, I have got those erros.

thanks for your help !

Exception in thread "AWT-EventQueue-0" javax.media.opengl.GLException: Unable to set pixel format 13 for device context 0xfe011817: error code 0
    at jogamp.opengl.windows.wgl.WindowsWGLGraphicsConfigurationFactory.updateGraphicsConfiguration(WindowsWGLGraphicsConfigurationFactory.java:205)
    at jogamp.opengl.windows.wgl.WindowsWGLGraphicsConfiguration.updateGraphicsConfiguration(WindowsWGLGraphicsConfiguration.java:136)
    at jogamp.opengl.windows.wgl.WindowsWGLDrawable.setRealizedImpl(WindowsWGLDrawable.java:70)
    at jogamp.opengl.GLDrawableImpl.setRealized(GLDrawableImpl.java:163)
    at javax.media.opengl.awt.GLCanvas.validateGLDrawable(GLCanvas.java:599)
    at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:409)
    at javax.media.opengl.awt.GLCanvas.paint(GLCanvas.java:515)
    at sun.awt.RepaintArea.paintComponent(RepaintArea.java:248)
    at sun.awt.RepaintArea.paint(RepaintArea.java:224)
    at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:308)
    at java.awt.Component.dispatchEventImpl(Component.java:4729)
    at java.awt.Component.dispatchEvent(Component.java:4481)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
    at java.awt.EventQueue.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:607)
    at java.awt.EventQueue$1.run(EventQueue.java:605)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$2.run(EventQueue.java:621)
    at java.awt.EventQueue$2.run(EventQueue.java:619)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Exception in thread "Animation Thread" javax.media.opengl.GLException: Unable to create temp OpenGL context for device context 0x810115b4
    at jogamp.opengl.windows.wgl.WindowsWGLContext.createImpl(WindowsWGLContext.java:293)
    at jogamp.opengl.GLContextImpl.makeCurrentWithinLock(GLContextImpl.java:515)
    at jogamp.opengl.GLContextImpl.makeCurrent(GLContextImpl.java:434)
    at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:415)
    at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:364)
    at javax.media.opengl.awt.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:945)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:646)
    at java.awt.EventQueue.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:607)
    at java.awt.EventQueue$1.run(EventQueue.java:605)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:616)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Exception in thread "AWT-EventQueue-0" javax.media.opengl.GLException: Unable to create temp OpenGL context for device context 0x62011538
    at jogamp.opengl.windows.wgl.WindowsWGLContext.createImpl(WindowsWGLContext.java:293)
    at jogamp.opengl.GLContextImpl.makeCurrentWithinLock(GLContextImpl.java:515)
    at jogamp.opengl.GLContextImpl.makeCurrent(GLContextImpl.java:434)
    at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:415)
    at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:364)
    at javax.media.opengl.awt.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:827)
    at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:415)
    at javax.media.opengl.awt.GLCanvas.paint(GLCanvas.java:515)
    at sun.awt.RepaintArea.paintComponent(RepaintArea.java:248)
    at sun.awt.RepaintArea.paint(RepaintArea.java:224)
    at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:308)
    at java.awt.Component.dispatchEventImpl(Component.java:4729)
    at java.awt.Component.dispatchEvent(Component.java:4481)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
    at java.awt.EventQueue.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:607)
    at java.awt.EventQueue$1.run(EventQueue.java:605)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$2.run(EventQueue.java:621)
    at java.awt.EventQueue$2.run(EventQueue.java:619)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

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