Book Image

Advanced Natural Language Processing with TensorFlow 2

By : Ashish Bansal, Tony Mullen
Book Image

Advanced Natural Language Processing with TensorFlow 2

By: Ashish Bansal, Tony 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)
11
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12
Index

Image processing with CNNs and ResNet50

In the world of deep learning, specific architectures have been developed to handle specific modalities. CNNs have been incredibly successful in processing images and are the standard architecture for CV tasks. A good mental model for using a pre-trained model for extracting features from images is that of using pre-trained word embeddings like GloVe for text. In this particular case, we use a specific architecture called ResNet50. While a comprehensive treatment of CNNs is outside the scope of this book, a brief overview of CNNs and ResNet will be provided in this section. If you are already comfortable with these concepts, you may skip ahead to the section titled Image feature extraction with ResNet50.

CNNs

CNNs are an architecture designed to learn from the following key properties, which are relevant to image recognition:

  • Data locality: The pixels in an image are highly correlated to the pixels around them.
  • ...