code: public TrifocalTensor copy() {
  		TrifocalTensor ret = new TrifocalTensor();
  		ret.T1.set(T1);
  		ret.T2.set(T2);
  		ret.T3.set(T3);
  		return ret;
  	}
docs: Returns a new copy of the TrifocalTensor
  
  @return Copy of the trifocal tensor