code: public static void extractFundamental( TrifocalTensor tensor , DMatrixRMaj F21 , DMatrixRMaj F31 ) {
  		TrifocalExtractGeometries e = new TrifocalExtractGeometries();
  		e.setTensor(tensor);
  		e.extractFundmental(F21,F31);
  	}
docs: <p>
  Extract the fundamental matrices between views 1 + 2 and views 1 + 3.  The returned Fundamental
  matrices will have the following properties: x<sub>i</sub><sup>T</sup>*Fi*x<sub>1</sub> = 0, where i is view 2 or 3.
  </p>
  
  <p>
  NOTE: The first camera is assumed to have the camera matrix of P1 = [I|0].  Thus observations in pixels for
  the first camera will not meet the epipolar constraint when applied to the returned fundamental matrices.
  </p>
  
  @see TrifocalExtractGeometries
  
  @param tensor Trifocal tensor.  Not modified.
  @param F21 Output: Fundamental matrix for views 1 and 2. Modified.
  @param F31 Output: Fundamental matrix for views 1 and 3. Modified.