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Hands-On Convolutional Neural Networks with TensorFlow

You're reading from   Hands-On Convolutional Neural Networks with TensorFlow Solve computer vision problems with modeling in TensorFlow and Python

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Product type Paperback
Published in Aug 2018
Publisher Packt
ISBN-13 9781789130331
Length 272 pages
Edition 1st Edition
Languages
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Authors (5):
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 Araujo Araujo
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Araujo
 Zafar Zafar
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Zafar
 Tzanidou Tzanidou
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Tzanidou
 Burton Burton
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Burton
 Patel Patel
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Patel
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Table of Contents (12) Chapters Close

Preface 1. Setup and Introduction to TensorFlow FREE CHAPTER 2. Deep Learning and Convolutional Neural Networks 3. Image Classification in TensorFlow 4. Object Detection and Segmentation 5. VGG, Inception Modules, Residuals, and MobileNets 6. Autoencoders, Variational Autoencoders, and Generative Adversarial Networks 7. Transfer Learning 8. Machine Learning Best Practices and Troubleshooting 9. Training at Scale 10. References 11. Other Books You May Enjoy

Bias and Variance


Variance and Bias is another way of saying overfitting and underfitting respectively, as discussed in Chapter 2Deep Learning and Convolutional Neural Networks. We can diagnose the problem of "underfitting" and "overfitting" using the train set, dev set and test set errors.

Consider the following scenario where we have data coming from two different distributions named as Distribution 1 and Distribution 2. Distribution 2 represents the target application which we care about. The question is, how do we define train, dev and test sets on such distributions.

The best way to do so is to split it according to the preceding figure. Distribution 1 is split in to train set and part of it is used as the dev set. Here we are calling it the "Train-Dev set" ( because the dev set has same distribution as train set). Distribution 1 is used mainly for training as it is a large dataset. Distribution 2 is split into test set and dev set which are independent of either sets from Distribution...

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