/**
 * Prepare an image 16-value greyscale array for arduino
 */
 
PImage a;
int sum;

void setup()
{
  sum=0;
  a = loadImage("/users/mrfoo/kerouac.gif");

    for (int y=0; y<31; y++) {
    for (int x=0; x<23; x++) {
      color pix = a.get(x, y);
      int grey = int(round(abs(255-brightness(pix))/20)-1);
      if (grey<0) { grey=0; }
      print(grey+", ");
      sum+=grey;
    }
    println();
}
println("Sum = "+sum);
}

void draw()
{ 
 

}