pic

PImage img;
int sc = 7; //scale factor

void setup() {
  img = loadImage("1.jpg");
  size(1200, 800);
  doStuff();
}

void draw() {
}

void mouseClicked() {
  doStuff();
}

void keyPressed() {
  save(random(100)+".jpg");
}

void doStuff() {
  background(255);
  int w = img.width/sc;
  int h = img.height/sc;
  for (int x=int (w*.1); x<width-w; x += int (w*1.1)) {
    for (int y=int (h*.1); y<height-h; y += int (h*1.1)) {
      PImage temp = createImage(w, h, RGB);
      temp.copy(img, 0, 0, img.width, img.height, 0, 0, w, h);
      tint(255, random(50, 256));
      image(temp, x, y);
    }
  }
}