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

Using the pretrained model for prediction

By the way, you may actually run an inference on a given image using the ResNet50 architecture on pretrained ImageNet weights, as we have initialized here. You can do this by first preprocessing the desired image on which you want to run inference into the appropriate four-dimensional tensor format, as shown here. The same of course applies for any dataset of images you may have, as long as they are resized to the appropriate format:

The preceding code reshapes one of our leopard images into a 4D tensor by expanding its dimension along the 0 axis, then feeds the tensor to our initialized ResNet50 model to get a class probability prediction. We then proceed to decode the prediction class into a human-readable output. For fun, we also defined the labels variable, which includes all the possible labels our network predicted for this image...