brightpaint

PImage img;
int maxX=200, maxY=250;

void setup() {
  img = loadImage("http://media-cache-ec0.pinimg.com/736x/55/3b/55/553b55b29e1fd8c0cc8944e91b8ba9cf.jpg");
  size(img.width, img.height);
  background(0);
  rectMode(CENTER);
  noStroke();
  for (int x=0; x<maxX; x++) {
    for (int y=0; y<maxY; y++) {
      int px = (int) map(x, 0, maxX, 0, width);
      int py = (int) map(y, 0, maxY, 0, height);
      color col = img.get(px, py);
      float br = brightness(col);
      if (br>50) {
        float sz = br/5;
        fill(col, 25);
        ellipse(px, py, sz, sz);
      }
    }
  }
}

void draw() {
}

void keyPressed() {
  save(random(3434) + ".jpg");

}