Hey all,
I'm building a small app that mixes the colors of the pixels of 2 pictures to create a new image. The idea is simple, a read pixel overlayed on a blue pixel should return a purple pixel. I have it running and blending using the PImage.blend() method but it doesnt seem to mix the colors that way. I've tried all the blend mode options. Is there a trick I'm missing or should i be looking into a more complex color mixing algorithm for this project? The Images are taken from the camera. on interaction a current frame is taken and blended with a previous saved image.

Heres what i have running so far:

1. import processing.video.*;
2. 
   
3. Capture cam;
4. boolean interaction = false; // has there been interaction
5. PImage currImage;
6. 
   
7. void setup(){
8.   size(800,600);
9.   background(0);
10.   frameRate(24);
11.   cam = new Capture(this, width, height, 24);
12. }
13. 
    
14. void draw(){
15.   background(0);
16.   if(cam.available()){
17.     cam.read();
18.     cam.loadPixels();
19.     if(currImage == null){
20.       currImage = cam.get();
21.     }else if(interaction){
22.       currImage.blend(cam, 0,0,width, height, 0,0, width, height, EXCLUSION);
23.       currImage.updatePixels();
24.       interaction = false;
25.       println("done");
26.     }
27.   }
28.   if(currImage != null){
29.     image(currImage, 0,0);
30.   }
31. }
32. 
    
33. void keyPressed(){
34.   go();
35. }
36. 
    
37. void go(){
38.   println("going");
39.   interaction = true;
40. }