Picture slicing and brightness sorting of those pictures in processing.

PicSlice

// this is where the picture gets sliced up, measured for brightness, and stored in the PicSlice object

slices=new PImage[width];
  for (int x=0;x<width;x++) {
    slices[x]=createImage(1, height, RGB);
    slices[x].loadPixels();
    for (int y=0;y<height; y++) {
      color colorSlice=img2.get(x, y);
      slices[x].pixels[y]=colorSlice;
    }
    slices[x].updatePixels();
    color brightnessColor=img2.get(x, 20);
    int brt=int(brightness(brightnessColor));
    bars[x]=new PicSlices(slices[x], brt);
  }


//here is the PicSlice object

class PicSlices implements Comparable {
  PImage img;
  int b;
  PicSlices(PImage theImg, int brightfulness) {
    this.img=theImg;
    b=brightfulness;
  }

  int compareTo(Object p)
  {
    PicSlices other=(PicSlices)p;
    if (other.b>b)  
      return -1;
    if (other.b==b)
      return 0;
    else
      return 1;
  }
}