title: how do i convert photographs to tensors
body: <p>I am a neophyte neural network user trying to get to grips with TensorFlow. I have used the MNIST dataset as a test, and would now like to use real world data.
  Can anyone point me to a "Howto" or paper or source which tells me how to go about converting digital photographs in files, (jpeg, png, gif, wmf), into a tensors ready for import into TensorFlow please?</p>
  
  <p>Cheers!</p>