label_image.py

# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import argparse
import sys

import numpy as np
import tensorflow as tf

def load_graph(model_file):
  print("IN LOAD GRAPH")
  graph = tf.Graph()
  graph_def = tf.GraphDef()

  with open(model_file, "rb") as f:
    graph_def.ParseFromString(f.read())
  with graph.as_default():
    tf.import_graph_def(graph_def)
  print("DONE LOADING GRAPH")
  return graph

def read_tensor_from_image_file(file_name, input_height=299, input_width=299,
				input_mean=0, input_std=255):
  input_name = "file_reader"
  output_name = "normalized"
  file_reader = tf.read_file(file_name, input_name)
  if file_name.endswith(".png"):
    image_reader = tf.image.decode_png(file_reader, channels = 3,
                                       name='png_reader')
  elif file_name.endswith(".gif"):
    image_reader = tf.squeeze(tf.image.decode_gif(file_reader,
                                                  name='gif_reader'))
  elif file_name.endswith(".bmp"):
    image_reader = tf.image.decode_bmp(file_reader, name='bmp_reader')
  else:
    image_reader = tf.image.decode_jpeg(file_reader, channels = 3,
                                        name='jpeg_reader')
  float_caster = tf.cast(image_reader, tf.float32)
  dims_expander = tf.expand_dims(float_caster, 0);
  resized = tf.image.resize_bilinear(dims_expander, [input_height, input_width])
  normalized = tf.divide(tf.subtract(resized, [input_mean]), [input_std])
  sess = tf.Session()
  result = sess.run(normalized)

  return result

def load_labels(label_file):
  label = []
  proto_as_ascii_lines = tf.gfile.GFile(label_file).readlines()
  for l in proto_as_ascii_lines:
    label.append(l.rstrip())
  return label

def function(graph, image, textFile):
  print("IN TF FUNCTION")
  file_name = image
  model_file = graph
  label_file = textFile
  input_height = 224
  input_width = 224
  input_mean = 128
  input_std = 128
  input_layer = "input"
  output_layer = "final_result"
  print("TF AFTER SET VARS")
  # parser = argparse.ArgumentParser()
  # parser.add_argument("--image", help="image to be processed")
  # parser.add_argument("--graph", help="graph/model to be executed")
  # parser.add_argument("--labels", help="name of file containing labels")
  # parser.add_argument("--input_height", type=int, help="input height")
  # parser.add_argument("--input_width", type=int, help="input width")
  # parser.add_argument("--input_mean", type=int, help="input mean")
  # parser.add_argument("--input_std", type=int, help="input std")
  # parser.add_argument("--input_layer", help="name of input layer")
  # parser.add_argument("--output_layer", help="name of output layer")
  # args = parser.parse_args()
  print("TF AFTER PARSER")
  # if args.graph:
  #   model_file = args.graph
  # if args.image:
  #   file_name = args.image
  # if args.labels:
  #   label_file = args.labels
  # if args.input_height:
  #   input_height = args.input_height
  # if args.input_width:
  #   input_width = args.input_width
  # if args.input_mean:
  #   input_mean = args.input_mean
  # if args.input_std:
  #   input_std = args.input_std
  # if args.input_layer:
  #   input_layer = args.input_layer
  # if args.output_layer:
  #   output_layer = args.output_layer
  print("TF AFTER ARG PARSER")
  graph = load_graph(model_file)
  t = read_tensor_from_image_file(file_name,
                                  input_height=input_height,
                                  input_width=input_width,
                                  input_mean=input_mean,
                                  input_std=input_std)

  input_name = "import/" + input_layer
  output_name = "import/" + output_layer
  input_operation = graph.get_operation_by_name(input_name);
  output_operation = graph.get_operation_by_name(output_name);

  with tf.Session(graph=graph) as sess:
    results = sess.run(output_operation.outputs[0],
                      {input_operation.outputs[0]: t})
  results = np.squeeze(results)

  top_k = results.argsort()[-5:][::-1]
  labels = load_labels(label_file)
  for i in top_k:
    print(labels[i], results[i])
  print("TF FUNCTION DONE")
  return (labels, results)