Book Image

Hands-On Image Processing with Python

By : Sandipan Dey
Book Image

Hands-On Image Processing with Python

By: Sandipan Dey

Overview of this book

Image processing plays an important role in our daily lives with various applications such as in social media (face detection), medical imaging (X-ray, CT-scan), security (fingerprint recognition) to robotics & space. This book will touch the core of image processing, from concepts to code using Python. The book will start from the classical image processing techniques and explore the evolution of image processing algorithms up to the recent advances in image processing or computer vision with deep learning. We will learn how to use image processing libraries such as PIL, scikit-mage, and scipy ndimage in Python. This book will enable us to write code snippets in Python 3 and quickly implement complex image processing algorithms such as image enhancement, filtering, segmentation, object detection, and classification. We will be able to use machine learning models using the scikit-learn library and later explore deep CNN, such as VGG-19 with Keras, and we will also use an end-to-end deep learning model called YOLO for object detection. We will also cover a few advanced problems, such as image inpainting, gradient blending, variational denoising, seam carving, quilting, and morphing. By the end of this book, we will have learned to implement various algorithms for efficient image processing.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Dedication
About Packt
Contributors
Preface
Index

Image classification with TensorFlow or Keras


In this section, we shall revisit the problem of handwritten digits classification (with the MNIST dataset), but this time with deep neural networks. We are going to solve the problem using two very popular deep learning libraries, namely TensorFlow and Keras. TensorFlow (TF) is the most famous library used in production for deep learning models. It has a very large and awesome community. However, TensorFlow is not that easy to use. On the other hand, Keras is a high level API built on TensorFlow. It is more user-friendly and easy to use compared to TF, although it provides less control over low-level structures. Low-level libraries provide more flexibility. Hence TF can be tweaked much more as compared to Keras.

Classification with TF

First, we shall start with a very simple deep neural network, one containing only a single FC hidden layer (with ReLU activation) and a softmax FC layer, with no convolutional layer. The next screenshot shows the...