From 84a8b11942633d2769b88c06494892afffe62f1e Mon Sep 17 00:00:00 2001
From: Cyrille Nofficial <cynoffic@cyrilix.fr>
Date: Tue, 5 Nov 2019 19:55:27 +0100
Subject: [PATCH] Export tf model

---
 src/tf_container/train_entry_point.py | 45 +++++++++++++++++----------
 1 file changed, 29 insertions(+), 16 deletions(-)

diff --git a/src/tf_container/train_entry_point.py b/src/tf_container/train_entry_point.py
index 97d08cc..0fcc9ba 100644
--- a/src/tf_container/train_entry_point.py
+++ b/src/tf_container/train_entry_point.py
@@ -1,19 +1,20 @@
 #!/usr/bin/env python3
 
-import container_support as cs
-
 import os
-import json
-import re
-import zipfile
-from keras.preprocessing.image import load_img, img_to_array
-import numpy as np
 
-from keras.layers import Input, Dense, merge
-from keras.models import Model
-from keras.layers import Convolution2D, MaxPooling2D, Reshape, BatchNormalization
-from keras.layers import Activation, Dropout, Flatten, Dense
+import container_support as cs
+import json
+import numpy as np
+import re
+import tensorflow as tf
+import zipfile
+from keras import backend as K
 from keras import callbacks
+from keras.layers import Convolution2D
+from keras.layers import Dropout, Flatten, Dense
+from keras.layers import Input
+from keras.models import Model
+from keras.preprocessing.image import load_img, img_to_array
 from tensorflow.python.client import device_lib
 
 
@@ -97,11 +98,16 @@ def train():
     logs = callbacks.TensorBoard(log_dir='logs', histogram_freq=0, write_graph=True, write_images=True)
     save_best = callbacks.ModelCheckpoint('/opt/ml/model/model_cat', monitor='angle_out_loss', verbose=1, save_best_only=True, mode='min')
     early_stop = callbacks.EarlyStopping(monitor='angle_out_loss',
-                                                    min_delta=.0005,
-                                                    patience=10,
-                                                    verbose=1,
-                                                    mode='auto')
-    img_in = Input(shape=(128, 160, 3), name='img_in')                      # First layer, input layer, Shape comes from camera.py resolution, RGB
+                                         min_delta=.0005,
+                                         patience=10,
+                                         verbose=1,
+                                         mode='auto')
+    # Only for export model to tensorflow
+    sess = tf.Session()
+    K.set_session(sess)
+
+    img_in = Input(shape=(128, 160, 3),
+                   name='img_in')  # First layer, input layer, Shape comes from camera.py resolution, RGB
     x = img_in
     x = Convolution2D(24, (5,5), strides=(2,2), activation='relu')(x)       # 24 features, 5 pixel x 5 pixel kernel (convolution, feauture) window, 2wx2h stride, relu activation
     x = Convolution2D(32, (5,5), strides=(2,2), activation='relu')(x)       # 32 features, 5px5p kernel window, 2wx2h stride, relu activatiion
@@ -129,3 +135,10 @@ def train():
                         'throttle_out': 'mean_absolute_error'},
                 loss_weights={'angle_out': 0.9, 'throttle_out': .001})
     model.fit({'img_in':images},{'angle_out': angle_cat_array, 'throttle_out': throttle_array}, batch_size=32, epochs=100, verbose=1, validation_split=0.2, shuffle=True, callbacks=callbacks_list)
+    # Save model for tensorflow using
+    builder = tf.saved_model.builder.SavedModelBuilder("myModel")
+
+    # Tag the model, required for Go
+    builder.add_meta_graph_and_variables(sess, ["myTag"])
+    builder.save()
+    sess.close()