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Deep Learning with Theano

You're reading from   Deep Learning with Theano Perform large-scale numerical and scientific computations efficiently

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781786465825
Length 300 pages
Edition 1st Edition
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Author (1):
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Christopher Bourez Christopher Bourez
Author Profile Icon Christopher Bourez
Christopher Bourez
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Table of Contents (15) Chapters Close

Preface 1. Theano Basics FREE CHAPTER 2. Classifying Handwritten Digits with a Feedforward Network 3. Encoding Word into Vector 4. Generating Text with a Recurrent Neural Net 5. Analyzing Sentiment with a Bidirectional LSTM 6. Locating with Spatial Transformer Networks 7. Classifying Images with Residual Networks 8. Translating and Explaining with Encoding – decoding Networks 9. Selecting Relevant Inputs or Memories with the Mechanism of Attention 10. Predicting Times Sequences with Advanced RNN 11. Learning from the Environment with Reinforcement 12. Learning Features with Unsupervised Generative Networks 13. Extending Deep Learning with Theano Index

Data augmentation


Data augmentation is a very important technique to improve classification accuracy. Data augmentation consists of creating new samples from existing samples, by adding some jitters such as:

  • Random scale

  • Random sized crop

  • Horizontal flip

  • Random rotation

  • Lighting noise

  • Brightness jittering

  • Saturation jittering

  • Contrast jittering

This will help the model to be more robust to different lighting conditions that are very common in real life.

Instead of always seeing the same dataset, the model discovers different samples at each epoch.

Note that input normalization is also important to get better results.

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