Performing the style transfer

The function that performs style_transfer is quite long so we will present it in sections. Its signature is as follows:

def run_style_transfer(content_path,
                       style_path,
                       number_of_iterations=1000,
                       content_weight=1e3,
                       style_weight=1e-2):

Since we don't want to actually train any layers in our model, just use the output values from the layers as described previously; we set their trainable properties accordingly:

model = get_model() 
for layer in model.layers:
  layer.trainable = False

Next, we get the style_features and content_features representations from the layers of our model, using the function previously defined:

style_features, content_features = get_feature_representations(model, content_path, style_path)

And gram_style_features, using a loop over style_features...