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)

Spotting outliers using autoencoders

Another great application of autoencoders is outlier detection. The idea behind this use case is that the autoencoder will learn an encoding with a very small error for the most common classes in a dataset, while its ability to reproduce scarcely represented categories (outliers) will be much more error-prone.

With this premise in mind, in this recipe, we'll rely on a convolutional autoencoder to detect outliers in a subsample of Fashion-MNIST.

Let's begin!

Getting ready

To install OpenCV, use the following pip command:

$> pip install opencv-contrib-python

We'll rely on TensorFlow's built-in convenience functions to load the Fashion-MNIST dataset.

How to do it…

Follow these steps to complete this recipe:

  1. Import the required packages:
    import cv2
    import numpy as np
    from sklearn.model_selection import train_test_split
    from tensorflow.keras import Model
    from tensorflow.keras.datasets import...