code: public void extractEpipoles( Point3D_F64 e2 , Point3D_F64 e3 ) {
  		e2.set(this.e2);
  		e3.set(this.e3);
  	}
docs: Extracts the epipoles from the trifocal tensor.  Extracted epipoles will have a norm of 1
  as an artifact of using SVD.
  
  @param e2  Output: Epipole in image 2. Homogeneous coordinates. Modified
  @param e3  Output: Epipole in image 3. Homogeneous coordinates. Modified