sclass URecognizer {

  IIntegralImage image;

  *() {}

  *(IIntegralImage *image) {}

  *(BufferedImage image) {

    this.image = IntegralImage(image);

  }

  // returns 0, 1 or 2

  int posterizeToInt(double x) {

    ret ifloor(clampZeroToOne(x)*3);

  }

  // returns 0, .5 or 1

  double posterizeInPlace(double x) {

    ret posterizeToInt(x)*.5;

  }

  class Cell {

    // Original image and which part we are looking at

    DoubleRange xClip, yClip;

    // color transformations in place

    DoubleRange[] colorClips = new[3];

    Cell copy() {

      new Cell c;

      c.xClip = xClip;

      arrayCopy(colorClips, c.colorClips);

      ret c;

    }

    Rect rectInImage() {

      ret toRect_floor(doubleRectFromRanges(xClip, yClip));

    }

    // get color of cell

    double color(int channel) {

      double color = ii_averageBrightnessOfArea(image, rectInImage(), channel);

      ret transformBetweenDoubleRanges(color, colorClips[channel], zeroToOne());

    }

    // unposterized color of all 3 channels

    double[] color() {

      double[] c = new[3];

      for i to 3:

        c[i] = color(i);

      ret c;

    }

    toString {

      ret "Color: " + asList(color());

    }

    int posterizedIntColor(int channel) {

      ret posterizeToInt(color(channel));

    }

    // get sub-cells

    Cell[] xSplit() {

      Cell[] cells = new[3];

      for i to 3: cells[i] = xSlice(i/3.0, (i+1)/3.0);

      ret cells;

    }

    Cell xSlice(double a, double b) {

      Cell c = copy();

      c.xClip = transformBetweenDoubleRanges(DoubleRange(a, b), zeroToOne(), xClip);

      ret c;

    }

    Cell[] ySplit() {

      Cell[] cells = new[3];

      for i to 3: cells[i] = ySlice(i/3.0, (i+1)/3.0);

      ret cells;

    }

    Cell ySlice(double a, double b) {

      Cell c = copy();

      c.yClip = transformBetweenDoubleRanges(DoubleRange(a, b), zeroToOne(), yClip);

      ret c;

    }

  }

  // make the root cell

  Cell rootCell() {

    new Cell c;

    c.xClip = doubleRange(0, image.getWidth());

    c.yClip = doubleRange(0, image.getHeight());

    for i to 3: c.colorClips[i] = doubleRange(0, 255);

    ret c;

  }

}