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Advanced Natural Language Processing with TensorFlow 2

Advanced Natural Language Processing with TensorFlow 2

By : Ashish Bansal, Mullen
4.8 (35)
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Advanced Natural Language Processing with TensorFlow 2

Advanced Natural Language Processing with TensorFlow 2

4.8 (35)
By: Ashish Bansal, Mullen

Overview of this book

Recently, there have been tremendous advances in NLP, and we are now moving from research labs into practical applications. This book comes with a perfect blend of both the theoretical and practical aspects of trending and complex NLP techniques. The book is focused on innovative applications in the field of NLP, language generation, and dialogue systems. It helps you apply the concepts of pre-processing text using techniques such as tokenization, parts of speech tagging, and lemmatization using popular libraries such as Stanford NLP and SpaCy. You will build Named Entity Recognition (NER) from scratch using Conditional Random Fields and Viterbi Decoding on top of RNNs. The book covers key emerging areas such as generating text for use in sentence completion and text summarization, bridging images and text by generating captions for images, and managing dialogue aspects of chatbots. You will learn how to apply transfer learning and fine-tuning using TensorFlow 2. Further, it covers practical techniques that can simplify the labelling of textual data. The book also has a working code that is adaptable to your use cases for each tech piece. By the end of the book, you will have an advanced knowledge of the tools, techniques and deep learning architecture used to solve complex NLP problems.
Table of Contents (13 chapters)
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11
Other Books You May Enjoy
12
Index

Training the Transformer model with VisualEncoder

Training the Transformer model can take hours as we want to train for around 20 epochs. It is best to put the training code into a file so that it can be run from the command line. Note that the model will be able to show some results even after 4 epochs of training. The training code is in the caption-training.py file. At a high level, the following steps need to be performed before starting training. First, the CSV file with captions and image names is loaded in, and the corresponding paths for the files with extracted image features are appended. The Subword Encoder is also loaded in. A tf.data.Dataset is created with the encoded captions and image features for easy batching and feeding them into the model for training. A loss function, an optimizer with a learning rate schedule, is created for use in training. A custom training loop is used to train the Transformer model. Let's go over these steps in detail...

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