code: public void setCamera( double skew , double cx , double cy , int width , int height ) {
  
  		// Define normalization matrix
  		// center points, remove skew, scale coordinates
  		double d = Math.sqrt(width*width + height*height);
  		V.zero();
  		V.set(0,0,d/2); V.set(0,1,skew); V.set(0,2,cx);
  		V.set(1,1,d/2); V.set(1,2,cy);
  		V.set(2,2,1);
  
  		CommonOps_DDRM.invert(V,Vinv);
  	}
docs: Specifies known portions of camera intrinsic parameters
  @param skew skew
  @param cx image center x
  @param cy image center y
  @param width Image width
  @param height Image height