Book Image

TensorFlow 2.0 Computer Vision Cookbook

By : Jesús Martínez
Book Image

TensorFlow 2.0 Computer Vision Cookbook

By: Jesús Martínez

Overview of this book

Computer vision is a scientific field that enables machines to identify and process digital images and videos. This book focuses on independent recipes to help you perform various computer vision tasks using TensorFlow. The book begins by taking you through the basics of deep learning for computer vision, along with covering TensorFlow 2.x’s key features, such as the Keras and tf.data.Dataset APIs. You’ll then learn about the ins and outs of common computer vision tasks, such as image classification, transfer learning, image enhancing and styling, and object detection. The book also covers autoencoders in domains such as inverse image search indexes and image denoising, while offering insights into various architectures used in the recipes, such as convolutional neural networks (CNNs), region-based CNNs (R-CNNs), VGGNet, and You Only Look Once (YOLO). Moving on, you’ll discover tips and tricks to solve any problems faced while building various computer vision applications. Finally, you’ll delve into more advanced topics such as Generative Adversarial Networks (GANs), video processing, and AutoML, concluding with a section focused on techniques to help you boost the performance of your networks. By the end of this TensorFlow book, you’ll be able to confidently tackle a wide range of computer vision problems using TensorFlow 2.x.
Table of Contents (14 chapters)

Fine-tuning a network using TFHub

One of the easiest ways to fine-tune a network is to rely on the wealth of pre-trained models that live in TensorFlow Hub (TFHub). In this recipe, we'll fine-tune a ResNetV1152 feature extractor to classify flowers from a very small dataset.

Getting ready

We will need tensorflow-hub and Pillow for this recipe. Both can be installed easily, like this:

$> pip install tensorflow-hub Pillow

We'll use a dataset known as 17 Category Flower Dataset, which can be accessed at http://www.robots.ox.ac.uk/~vgg/data/flowers/17. I encourage you to get a re-organized copy of the data here: https://github.com/PacktPublishing/Tensorflow-2.0-Computer-Vision-Cookbook/tree/master/ch3/recipe3/flowers17.zip. Download and decompress it in a location of your choosing. From now on, we'll assume the data is in ~/.keras/datasets/flowers17.

The following are some sample images from this dataset:

Figure 3.6 – Example...