S filter = 'blur;
  int filterLevel;
  bool distanceFromColor;
  int dc_r, dc_g, dc_b;
  float dc_gain = 5f;
  float contrastThreshold = 0.5f;
  int gridSize = 2;
  DoubleRange widthRange = new(0, 1);
  DoubleRange heightRange = new(0, 1);
  DoubleRange xRange = new(0, 1);
  DoubleRange yRange = new(0, 1);