title: A problem when run tflite model(the result of tflite model is nan)
body: <p>I trained a model to convert sketch picture to color picture. <a href="https://i.stack.imgur.com/GSwjw.png" rel="nofollow noreferrer">enter image description here</a> middle is ground truth, left is original and right is pridiction. This result was ran by model.h5 but there is a wrong result when i run program using model.tflite.</p>
  
  <p>this is my convert code</p>
  
  <pre><code>tflite_convert --keras_model_file=G:/pix2pix/generator.h5 --output_file=G:/pix2pix/convert.tflite
  </code></pre>
  
  <p>this is the result ran by model.tflite</p>
  
  <pre><code>[[[[nan nan nan] ...
  </code></pre>