Removes the background using processing.

BackgroundRemoval.pde

import processing.video.*;
import gab.opencv.*;

Capture liveCam;
PImage camCapture, foregroundMask, screenshot;

OpenCV opencv;

int width = 640;
int height = 480;

void setup() {
  fullScreen();
  liveCam = new Capture(this,width,height);
  
  camCapture = createImage(width,height,HSB);
  screenshot = createImage(width,height,HSB);
  foregroundMask = createImage(width,height,HSB);
  
  opencv = new OpenCV(this, foregroundMask);
  liveCam.start();
}

void draw() {
  if (liveCam.available()) {
    liveCam.read();
  }
  
  // Load current webcam frame.
  camCapture.set(0,0,liveCam);
  camCapture.loadPixels();

  opencv.loadImage(camCapture);
  
  // Take the difference between what was set as the background and the current frame.
  opencv.diff(screenshot);
  
  opencv.blur(6);
  opencv.threshold(50);
  opencv.erode();
  opencv.erode();
  opencv.erode();
  opencv.dilate();
  opencv.dilate();
  opencv.dilate();
  
  // Invert removes the background, remove this to go the other way
  opencv.invert();
  
  foregroundMask = opencv.getSnapshot();
  camCapture.blend(foregroundMask, 0, 0, width, height, 0, 0, width, height, ADD); 
  image(camCapture,0,0);
}

void mouseClicked() {
  screenshot.set(0,0,liveCam);
}