// Learning Processing
  // Daniel Shiffman
  // http://www.learningprocessing.com
  
  // Example 15-11: Brightness threshold with filter
  
  PImage img;
  
  void setup() {
    size(200,200);
    img = loadImage("sunflower.jpg");
  }
  
  void draw() {
    // Draw the image
    image(img,0,0);
    // Filter the window with a threshold effect
    // 0.5 means threshold is 50% brightness
    filter(THRESHOLD,0.5);
  }