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Hands-On Computer Vision with TensorFlow 2

You're reading from   Hands-On Computer Vision with TensorFlow 2 Leverage deep learning to create powerful image processing apps with TensorFlow 2.0 and Keras

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Product type Paperback
Published in May 2019
Publisher Packt
ISBN-13 9781788830645
Length 372 pages
Edition 1st Edition
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Authors (2):
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Eliot Andres Eliot Andres
Author Profile Icon Eliot Andres
Eliot Andres
Benjamin Planche Benjamin Planche
Author Profile Icon Benjamin Planche
Benjamin Planche
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Table of Contents (16) Chapters Close

Preface 1. Section 1: TensorFlow 2 and Deep Learning Applied to Computer Vision FREE CHAPTER
2. Computer Vision and Neural Networks 3. TensorFlow Basics and Training a Model 4. Modern Neural Networks 5. Section 2: State-of-the-Art Solutions for Classic Recognition Problems
6. Influential Classification Tools 7. Object Detection Models 8. Enhancing and Segmenting Images 9. Section 3: Advanced Concepts and New Frontiers of Computer Vision
10. Training on Complex and Scarce Datasets 11. Video and Recurrent Neural Networks 12. Optimizing Models and Deploying on Mobile Devices 13. Migrating from TensorFlow 1 to TensorFlow 2 14. Assessments 15. Other Books You May Enjoy

Channel pruning and weight sparsification

Other techniques exist but can be harder to implement. There is no straightforward way to apply them because they rely mostly on trial and error.

The first one, channel pruning, consists of removing some convolutional filters or some channels. Convolutional layers usually have between 16 and 512 different filters. At the end of the training phase, it often appears that some of them are not useful. We can remove them to avoid storing weights that will not help the model performance.

The second one is called weight sparsification. Instead of storing weights for the whole matrix, we can store only the ones that are deemed important or not close to zero.

For instance, instead of storing a weight vector such as [0.1, 0.9, 0.05, 0.01, 0.7, 0.001], we could keep weights that are not close to zero. The result is a list of tuples in the form (position, value). In our example, it would be [(1, 0.9), (4, 0.7)]. If many of the vector's values...

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