sinterface IBinaryImage extends MakesBufferedImage {
  bool getBoolPixel(int x, int y);
  default void setPixel(int x, int y, bool b) { throw unimplemented(); }
  
  public default BufferedImage getBufferedImage() {
    ret toBWImage().getBufferedImage();
  }
  
  default BWImage toImage2B() {
    ret this instanceof Image2B ? (Image2B) this : iBinaryImageToImage2B(this);
  }
}