I followed the codelab TensorFlow For Poets for transfer learning using inception_v3. It generates retrained_graph.pb and retrained_labels.txt files, which can used to make
I believe that your error is quite simple to solve:
{ "key": "0", "image_bytes": { "b64": "jpeg_image_base64_encoded" } }
You used " to specify what, I believe, is a string. By doing that, your program is reading jpeg_image_base64_encoded instead of the actual value of the variable.
That's why you get always the same prediction.