code: public void setCameraParameters( float fx , float fy , float cx , float cy ,
  									 int width , int height ) {
  		this.fx = fx;
  		this.fy = fy;
  		this.cx = cx;
  		this.cy = cy;
  
  		derivX.reshape(width, height);
  		derivY.reshape(width, height);
  
  		// set these to the maximum possible size
  		int N = width*height*imageType.getNumBands();
  		A.reshape(N,6);
  		y.reshape(N,1);
  	}
docs: Specifies intrinsic camera parameters.  Must be called.
  @param fx focal length x (pixels)
  @param fy focal length y (pixels)
  @param cx principle point x (pixels)
  @param cy principle point y (pixels)
  @param width Width of the image
  @param height Height of the image