Content Comparison

import org.openkinect.processing.*;

Kinect2 kinect;
int[] depthMapRef; 
int[] depthMap;
int Threshold = 500;
int depthlength;
void setup() {
  size(512, 424);
  depthlength = 512*424;
  kinect = new Kinect2(this);
  kinect.initDepth();
  kinect.initDevice();
}

void draw() {
  PImage img = kinect.getDepthImage();
  depthMap = kinect.getRawDepth();
  loadPixels();
  if (depthMapRef == null) {
    depthMapRef = depthMap;
  }
  for (int x = 0; x < kinect.depthWidth; x++) {
    for (int y = 0; y < kinect.depthHeight; y++) {
      int loc = x+ y * kinect.depthWidth;
      int difference = abs(depthMap[loc]-depthMapRef[loc]);
      if ( difference  > Threshold) {
        pixels[loc] = color(150, 50, 50);
      } else {
        pixels[loc] = img.pixels[loc];
      }
    }
  }

  updatePixels();
}

void mousePressed() {
  depthMapRef = depthMap;
}