Book Image

Hands-On Neural Networks with Keras

By : Niloy Purkait
Book Image

Hands-On Neural Networks with Keras

By: Niloy Purkait

Overview of this book

Neural networks are used to solve a wide range of problems in different areas of AI and deep learning. Hands-On Neural Networks with Keras will start with teaching you about the core concepts of neural networks. You will delve into combining different neural network models and work with real-world use cases, including computer vision, natural language understanding, synthetic data generation, and many more. Moving on, you will become well versed with convolutional neural networks (CNNs), recurrent neural networks (RNNs), long short-term memory (LSTM) networks, autoencoders, and generative adversarial networks (GANs) using real-world training datasets. We will examine how to use CNNs for image recognition, how to use reinforcement learning agents, and many more. We will dive into the specific architectures of various networks and then implement each of them in a hands-on manner using industry-grade frameworks. By the end of this book, you will be highly familiar with all prominent deep learning models and frameworks, and the options you have when applying deep learning to real-world scenarios and embedding artificial intelligence as the core fabric of your organization.
Table of Contents (16 chapters)
Free Chapter
1
Section 1: Fundamentals of Neural Networks
5
Section 2: Advanced Neural Network Architectures
10
Section 3: Hybrid Model Architecture
13
Section 4: Road Ahead

Summarizing the convolution operation

All that we are doing here is applying a set of weights (that is, a filter) to local input spaces for feature extraction. We do this iteratively, moving our filter across the input space in fixed steps, known as a stride. Moreover, the use of different filters allows us to capture different patterns from a given input. Finally, since the filters convolve over the entire image, we are able to spatially share parameters for a given filter. This allows us to use the same filter to detect similar patterns in different locations of the image, relating to the concept of spatial invariance discussed earlier. However, these activation maps that a convolutional layer outputs are essentially abstract high-dimensional representations. We need to implement a mechanism to reduce these representations into more manageable dimensions, before we go ahead...