title: Neural network to detect one class of object only
body: <p>I'm totally new with neural networks (NN) in python, and I do not know if NN can run in raspberry pi 3? for I think the problem is that NN requires good CPU/GPU performance for training , data transferring and calculation. </p>
  
  <p>So is it possible to train a NN with single class training data? inorder to save CPU/GPU?. </p>
  
  <p>For example I want the system to detect only the sea cucumber in an image.
  A good answer/explanation or link to any example will be very appreciated. 
  THANKYOU PO</p>