Training Time for Eigenfaces using Opencv c++ <p>I'm currently training a database of Eigenfaces using Opencv. I have 50 persons in my database with 250 pictures each, and I use all Eigenfaces and its been 2 days since I started training and it still is not finished. How long should I still wait? and is 250 for each person too much? </p> <p>Any information will be much appreciated! Thanks!</p>