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Tensorflow can be used to fit the data to the model using the ‘fit’ method.

**Read More:**
What is TensorFlow and how Keras work with TensorFlow to create Neural Networks?

A neural network that contains at least one layer is known as a convolutional layer. We can use the Convolutional Neural Network to build learning model.

The intuition behind transfer learning for image classification is, if a model is trained on a large and general dataset, this model can be used to effectively serve as a generic model for the visual world. It would have learned the feature maps, which means the user won’t have to start from scratch by training a large model on a large dataset.

TensorFlow Hub is a repository that contains pre-trained TensorFlow models. TensorFlow can be used to fine-tune learning models. We will understand how to use models from TensorFlow Hub with tf.keras, use an image classification model from TensorFlow Hub. Once this is done, transfer learning can be performed to fine-tune a model for customized image classes. This is done by using a pretrained classifier model to take an image and predict what it is. This can be done without needing any training.

We are using the Google Colaboratory to run the below code. Google Colab or Colaboratory helps run Python code over the browser and requires zero configuration and free access to GPUs (Graphical Processing Units). Colaboratory has been built on top of Jupyter Notebook.

print("Training for 2 epochs only") class CollectBatchStats(tf.keras.callbacks.Callback): def __init__(self): self.batch_losses = [] self.batch_acc = [] def on_train_batch_end(self, batch, logs=None): self.batch_losses.append(logs['loss']) self.batch_acc.append(logs['acc']) self.model.reset_metrics() batch_stats_callback = CollectBatchStats() print("The fit method is called") history = model.fit(train_ds, epochs=2, callbacks=[batch_stats_callback])

Code credit −https://www.tensorflow.org/tutorials/images/transfer_learning_with_hub

Training for 2 epochs only The fit method is called Epoch 1/2 92/92 [==============================] - 88s 919ms/step - loss: 0.7155 - acc: 0.7460 Epoch 2/2 92/92 [==============================] - 85s 922ms/step - loss: 0.3694 - acc: 0.8754

The .fit method is used to train the model.

The training is kept short, hence only 2 epochs are used for training.

A custom callback is used to visualize the data, so as to log the loss and accuracy of each batch individually.

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