cmodule2 URecog > DynPrintLog {  
  // 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
    IIntegralImage image;
    DoubleRange xClip, yClip;

    // color transformations in place
    DoubleRange[] colorClips = new[3];

    // make the root cell
    *(IIntegralImage *image) {
      xClip = yClip = doubleRange(0, 1);
      for i to 3: colorClips[i] = doubleRange(0, 1);
    }

    double color(int channel) {
      ret ii_averageBrightnessOfArea(image, toRect_floor(
        doubleRectFromRanges(xClip, yClip)));
    }
  }
}