krshrimali and alalek Check if faces detected or not.
Added if condition, whether faces are detected or not, will help to keep program running for some images.
If imwrite used along with imshow, it may produce error for :  No faces found.Aborting.. in function 'fit' (Bad Argument).
Latest commit c3a2b42 May 21, 2018

Face recognition techniques

Collection of face recognition techniques:

  1. Eigen Faces
  2. Fisher Faces
  3. Local Binary Pattern Histograms