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Python Deep Learning

Python Deep Learning

By : Vasilev, Daniel Slater, Spacagna, Roelants, Zocca
4 (8)
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Python Deep Learning

Python Deep Learning

4 (8)
By: Vasilev, Daniel Slater, Spacagna, Roelants, Zocca

Overview of this book

With the surge in artificial intelligence in applications catering to both business and consumer needs, deep learning is more important than ever for meeting current and future market demands. With this book, you’ll explore deep learning, and learn how to put machine learning to use in your projects. This second edition of Python Deep Learning will get you up to speed with deep learning, deep neural networks, and how to train them with high-performance algorithms and popular Python frameworks. You’ll uncover different neural network architectures, such as convolutional networks, recurrent neural networks, long short-term memory (LSTM) networks, and capsule networks. You’ll also learn how to solve problems in the fields of computer vision, natural language processing (NLP), and speech recognition. You'll study generative model approaches such as variational autoencoders and Generative Adversarial Networks (GANs) to generate images. As you delve into newly evolved areas of reinforcement learning, you’ll gain an understanding of state-of-the-art algorithms that are the main components behind popular games Go, Atari, and Dota. By the end of the book, you will be well-versed with the theory of deep learning along with its real-world applications.
Table of Contents (16 chapters)
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Title Page
About Packt
Contributors
Preface
Index

Pooling layers


In the previous section, we explained how to increase the receptive field of the neurons by using a stride larger than 1. But we can also do this with the help of pooling layers. A pooling layer splits the input slice into a grid, where each grid cell represents a receptive field of a number of neurons (just as a convolutional layer does). Then, a pooling operation is applied over each cell of the grid. Different types of pooling layers exist. Pooling layers don't change the volume depth, because the pooling operation is performed independently on each slice.

Max pooling: is the most popular way of pooling. The max pooling operation takes the neuron with the highest activation value in each local receptive field (grid cell), and propagates only that value forward. In the following figure, we can see an example of max pooling with a receptive field of 2x2:

An example of the input and output of a max pooling operation with stride 2 and 2x2 receptive field. This operation discards...

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