title: Weights in eigenface approach
body: <p>1) In <a href="https://en.m.wikipedia.org/wiki/Eigenface" rel="nofollow noreferrer">eigenface</a> approach the eigenfaces is a combination of elements from different faces. What are these elements?</p>
  
  <p>2) The output face is an image composed of different eigenfaces with different weights. What does the weights of eigenfaces exactly mean? I know that the weight is percentage of eigenfacein the image, but what does it mean exactly, is mean the number of selected pixels? </p>