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sinterface IBWImage extends MakesBufferedImage, IRGBImage {
  float getFloatPixel(int x, int y); // usually between 0 and 1
  
  default int getInt(int x, int y) { ret iround(getFloatPixel(x, y)*255f); }
  
  // implementing IRGBImage
  default int getIntPixel(int x, int y) { ret rgbIntFromGrayscale(getInt(x, y)); }
  
  default float getFloatPixel(Pt p) { ret getFloatPixel(p.x, p.y); }
  
  default float getFloatPixel(int index) {
    int w = w();
    ret getFloatPixel(index % w, index / w);
  }
  
  default float[] toFloatArray() {
    float[] data = new[w()*h()];
    for i over data:
      data[i] = getFloatPixel(i);
    ret data;
  }
  
  public default BufferedImage getBufferedImage() {
    ret grayImageFromIBWImage(this);
  }
  
  default BWImage toBWImage() {
    ret this instanceof BWImage ? (BWImage) this : iBWImageToBWImage(this);
  }
}