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Image Processing with Keras in Python

Learn powerful techniques for image analysis in Python using deep learning and convolutional neural networks in Keras.

4 hours
13 Videos
45 Exercises
13,256 Participants
3,650 XP

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Course Description

Deep learning methods use data to train neural network algorithms to do a variety of machine learning tasks, such as classification of different classes of objects. Convolutional neural networks are deep learning algorithms that are particularly powerful for analysis of images. This course will teach you how to construct, train and evaluate convolutional neural networks. You will also learn how to improve their ability to learn from data, and how to interpret the results of the training.

Convolutional neural networks use the data that is represented in images to learn. In this chapter, we will probe data in images, and we will learn how to use Keras to train a neural network to classify objects that appear in images.

Convolutional neural networks gain a lot of power when they are constructed with multiple layers (deep networks). In this chapter, you will learn how to stack multiple convolutional layers into a deep network. You will also learn how to keep track of the number of parameters, as the network grows, and how to control this number.

Convolutions are the fundamental building blocks of convolutional neural networks. In this chapter, you will be introducted to convolutions and learn how they operate on image data. You will also see how you incorporate convolutions into Keras neural networks.

There are many ways to improve training by neural networks. In this chapter, we will focus on our ability to track how well a network is doing, and explore approaches towards improving convolutional neural networks.

1
Image Processing With Neural Networks
Free

Convolutional neural networks use the data that is represented in images to learn. In this chapter, we will probe data in images, and we will learn how to use Keras to train a neural network to classify objects that appear in images.
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Using Convolutions

Convolutions are the fundamental building blocks of convolutional neural networks. In this chapter, you will be introducted to convolutions and learn how they operate on image data. You will also see how you incorporate convolutions into Keras neural networks.
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Going Deeper

Convolutional neural networks gain a lot of power when they are constructed with multiple layers (deep networks). In this chapter, you will learn how to stack multiple convolutional layers into a deep network. You will also learn how to keep track of the number of parameters, as the network grows, and how to control this number.
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Understanding and Improving Deep Convolutional Networks

There are many ways to improve training by neural networks. In this chapter, we will focus on our ability to track how well a network is doing, and explore approaches towards improving convolutional neural networks.
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Ariel Rokem

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Ariel Rokem is a Data Scientist at the University of Washington eScience Institute. He received a PhD in neuroscience from UC Berkeley, and postdoctoral training in computational neuroimaging at Stanford. In his work, he develops data science algorithms and tools, and applies them to analysis of neural data. He is also a contributor to multiple open-source software projects in the scientific Python ecosystem.

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Image Processing with Keras in Python

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Course Description

Image Processing With Neural Networks

Introducing convolutional neural networks

Images as data: visualizations

Images as data: changing images

Classifying images

Using one-hot encoding to represent images

Evaluating a classifier

Classification with Keras

Build a neural network

Compile a neural network

Fitting a neural network model to clothing data

Cross-validation for neural network evaluation

Going Deeper

Going deeper

Creating a deep learning network

Train a deep CNN to classify clothing images

What is special about a deep network?

How many parameters?

How many parameters in a CNN?

How many parameters in a deep CNN?

Pooling operations

Write your own pooling operation

Keras pooling layers

Train a deep CNN with pooling to classify images

Using Convolutions

Convolutions

One dimensional convolutions

Image convolutions

Defining image convolution kernels

Implementing image convolutions in Keras

Convolutional network for image classification

Training a CNN to classify clothing types

Evaluating a CNN with test data

Tweaking your convolutions

Add padding to a CNN

Add strides to a convolutional network

Calculate the size of convolutional layer output

Understanding and Improving Deep Convolutional Networks

Tracking learning

Plot the learning curves

Using stored weights to predict in a test set

Regularization

Adding dropout to your network

Add batch normalization to your network

Interpreting the model

Extracting a kernel from a trained network

Shape of the weights

Visualizing kernel responses

Next steps