*/
public Gray8HorizVertContrast(int nWindow, int nA, int nB, int nC) {
Gray8HorizVar ghv = new Gray8HorizVar(nWindow);
Gray8VertVar gvv = new Gray8VertVar(nWindow);
Gray16LinComb glc = new Gray16LinComb(nA, nB, nC);
this.pipe = new Ladder(ghv, gvv, glc);
}