Book Image

Apache Spark Deep Learning Cookbook

By : Ahmed Sherif, Amrith Ravindra
Book Image

Apache Spark Deep Learning Cookbook

By: Ahmed Sherif, Amrith Ravindra

Overview of this book

Organizations these days need to integrate popular big data tools such as Apache Spark with highly efficient deep learning libraries if they’re looking to gain faster and more powerful insights from their data. With this book, you’ll discover over 80 recipes to help you train fast, enterprise-grade, deep learning models on Apache Spark. Each recipe addresses a specific problem, and offers a proven, best-practice solution to difficulties encountered while implementing various deep learning algorithms in a distributed environment. The book follows a systematic approach, featuring a balance of theory and tips with best practice solutions to assist you with training different types of neural networks such as convolutional neural networks (CNNs) and recurrent neural networks (RNNs). You’ll also have access to code written in TensorFlow and Keras that you can run on Spark to solve a variety of deep learning problems in computer vision and natural language processing (NLP), or tweak to tackle other problems encountered in deep learning. By the end of this book, you'll have the skills you need to train and deploy state-of-the-art deep learning models on Apache Spark.
Table of Contents (21 chapters)
Title Page
Copyright and Credits
Packt Upsell
Foreword
Contributors
Preface
Index

Preprocessing images


In the previous section, you may have noticed how all the images are not a front view of the face profiles, and that there are also slightly rotated side profiles. You may also have noticed some unnecessary background areas in each image that needs to be omitted. This section will describe how to preprocess and handle the images so that they are ready to be fed into the network for training.

Getting ready

Consider the following:

  • A lot of algorithms are devised to crop the significant part of an image; for example, SIFT, LBP, Haar-cascade filter, and so on.
  • We will, however, tackle this problem with a very simplistic naïve code to crop the facial portion from the image. This is one of the novelties of this algorithm.
  • We have found that the pixel intensity of the unnecessary background part is 28.
  • Remember that each image is a three-channel matrix of 200 x 200-pixels. This means that every image contains three matrices or Tensors of red, green, and blue pixels with an intensity...