I have tried to add in draw function this line

1. topLayer.putPixelsIntoTexture();

but it doesn't help...

second attempt with SimpleOpenNI - unsuccessfully

1. import processing.opengl.*;
2. import codeanticode.glgraphics.*;
3. import SimpleOpenNI.*;
4. 
   
5. GLTexture bottomLayer, topLayer, resultLayer;
6. GLTextureFilter blendFilter;
7. ScalarParam opacity;
8. SimpleOpenNI  context;
9. PImage img;
10. 
    
11. void setup()
12. {
13.   size(640, 480, GLConstants.GLGRAPHICS);
14.   context = new SimpleOpenNI(this);
15.   // mirror is by default enabled
16.   context.setMirror(true);
17.   //context.enableRGB(640,480,30);
18.   //context.enableRGB(1280,1024,15); 
19.  
20.   if(context.enableRGB() == false)
21.   {
22.      println("Can't open the rgbMap, maybe the camera is not connected or there is no rgbSensor!");
23.      exit();
24.      return;
25.   }
26.  
27.   blendFilter = new GLTextureFilter(this, "BlendDifference.xml");
28.   opacity = new ScalarParam(1.0,0.0,1.0,0.01);
29.   bottomLayer = new GLTexture(this, "background.jpg");
30.   topLayer = new GLTexture(this);    
31.   resultLayer = new GLTexture(this, topLayer.width,topLayer.height);
32. }
33. 
    
34. void draw()
35. {
36.   background(0);
37.   noStroke();
38.   context.update();
39.   img = context.rgbImage();
40.   topLayer.putImage(img);
41.   blendFilter.setParameterValue("Opacity", opacity.value);
42.   blendFilter.apply(new GLTexture[] {bottomLayer, topLayer}, resultLayer);
43.   resultLayer.render(0, 0);
44.   println(frameRate);
45. }
46. 
    
47. void keyPressed()
48. {
49.   if (key == CODED) {
50.     if (keyCode == UP) opacity.Increment();
51.     else if (keyCode == DOWN) opacity.Decrement();
52.   }
53. }
54. 
    
55. class ScalarParam {
56.   float value;
57.   float minValue;
58.   float maxValue;
59.   float step;
60.   ScalarParam(float v,float mn, float mx, float s) {
61.     value = v;
62.     minValue = mn;
63.     maxValue = mx;
64.     step = s;
65.   }
66.   void Increment() {
67.     value += step;
68.     if (value > maxValue) value=maxValue;
69.   }
70.   void Decrement() {
71.     value -= step;
72.     if (value < minValue) value=minValue;
73.   }
74. }

Here it is how to apply filters to a video cam:

1. import processing.opengl.*;
2. import codeanticode.glgraphics.*;
3. import codeanticode.gsvideo.*;
4. GSCapture cam;
5. GLTexture texSrc, texFiltered;
6. GLTextureFilter blur, emboss, edges, poster, pixelate, invert;
7. GLTextureFilter currentFilter;
8. String filterStr;
9. PFont font;
10. 
    
11. void setup() {
12.   size(640, 480, GLConstants.GLGRAPHICS);
13.   texSrc = new GLTexture(this);  
14.   texFiltered = new GLTexture(this);   
15.   cam = new GSCapture(this, 640, 480);
16.   cam.setPixelDest(texSrc);
17.   cam.start();
18.   blur = new GLTextureFilter(this, "Blur.xml");
19.   emboss = new GLTextureFilter(this, "Emboss.xml");
20.   edges = new GLTextureFilter(this, "Edges.xml");
21.   poster = new GLTextureFilter(this, "Posterize.xml");
22.   pixelate = new GLTextureFilter(this, "Pixelate.xml");
23.   invert = new GLTextureFilter(this, "Invert.xml");
24.   font = loadFont("EstrangeloEdessa-24.vlw");
25.   textFont(font, 24);     
26.   currentFilter = edges;
27.   filterStr = "edges";
28. }
29. 
    
30. void captureEvent(GSCapture cam) {
31.   cam.read();
32. }
33. 
    
34. void draw() {
35.   if (cam.ready()) {
36.     if (texSrc.putPixelsIntoTexture()) {
37.       // Calculating height to keep aspect ratio.     
38.       float h = width * texSrc.height / texSrc.width;
39.       float b = 0.5 * (height - h);
40.       if (currentFilter == null) image(texSrc, 0, b, width, h);
41.       else {
42.         if (currentFilter == pixelate) {
43.           currentFilter.setParameterValue("pixel_size", map(mouseX, 0, width, 1, 30));
44.         }
45.         if (currentFilter == invert) {
46.           float x = map(mouseX, 0, width, 0, texSrc.width);
47.           float y = map(mouseY, 0, height, 0, texSrc.height);
48.           currentFilter.setParameterValue("mpos", new float[]{x, y});
49.           currentFilter.setParameterValue("mdist", 50.0);             
50.         }
    
51.         texSrc.filter(currentFilter, texFiltered);
52.         image(texFiltered, 0, b, width, h);           
53.       }
54.       fill(50, 200, 50);
55.       if (currentFilter == null) text("Selected filter: none (1-6 to change, 0 to disable)", 10, 30);
56.       else text("Selected filter: " + currentFilter.getName() + " (1-6 to change, 0 to disable)", 10, 30);
57.     }    
58.   }
59. }
60. 
    
61. void keyPressed() {
62.   if ((key == '1')) { currentFilter = blur; }
63.   else if ((key == '2')) { currentFilter = emboss; }
64.   else if ((key == '3')) { currentFilter = edges; } 
65.   else if ((key == '4')) { currentFilter = poster; }
66.   else if ((key == '5')) { currentFilter = pixelate; } 
67.   else if ((key == '6')) { currentFilter = invert; }
68.   else if ((key == '0')) { currentFilter = null; }
69. }

Hello.
Can you send me the file "BlendDifference.xml" please?

1. <filter name="Difference">
2.     <description>Difference Blend Mode</description>
3.     <fragment>BlendDifference.glsl</fragment>
4.     <textures input="2" output="1">
5.         <intexture type="sampler2d" name="bottomSampler" label="source">0</intexture>
6.         <intexture type="sampler2d" name="topSampler" label="painted">1</intexture>
7.     </textures>
8.     <parameter type="float" name="Opacity" label="Opacity">1.0</parameter>
9. </filter>

Do you have got the library SimpleOpenNI for Windows 7 64bit? Because It says that the package "SimpleOpenNI" doesn't exist. You might be messing a library.

If you have got the library, how can install on Windows 7 64bit?