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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
Tools
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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

Unsupervised learning with co-localization


The first layers of the digit classifier trained in Chapter 2, Classifying Handwritten Digits with a Feedforward Network as an encoding function to represent the image in an embedding space, as for words:

It is possible to train unsurprisingly the localization network of the spatial transformer network by minimizing the hinge loss objective function on random sets of two images supposed to contain the same digit:

Minimizing this sum leads to modifying the weights in the localization network, so that two localized digits become closer than two random crops.

Here are the results:

(Spatial transformer networks paper, Jaderberg et al., 2015)

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