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Modern Computer Vision with PyTorch

You're reading from   Modern Computer Vision with PyTorch Explore deep learning concepts and implement over 50 real-world image applications

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Product type Paperback
Published in Nov 2020
Publisher Packt
ISBN-13 9781839213472
Length 824 pages
Edition 1st Edition
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Authors (2):
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Yeshwanth Reddy Yeshwanth Reddy
Author Profile Icon Yeshwanth Reddy
Yeshwanth Reddy
V Kishore Ayyadevara V Kishore Ayyadevara
Author Profile Icon V Kishore Ayyadevara
V Kishore Ayyadevara
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Toc

Table of Contents (25) Chapters Close

Preface 1. Section 1 - Fundamentals of Deep Learning for Computer Vision
2. Artificial Neural Network Fundamentals FREE CHAPTER 3. PyTorch Fundamentals 4. Building a Deep Neural Network with PyTorch 5. Section 2 - Object Classification and Detection
6. Introducing Convolutional Neural Networks 7. Transfer Learning for Image Classification 8. Practical Aspects of Image Classification 9. Basics of Object Detection 10. Advanced Object Detection 11. Image Segmentation 12. Applications of Object Detection and Segmentation 13. Section 3 - Image Manipulation
14. Autoencoders and Image Manipulation 15. Image Generation Using GANs 16. Advanced GANs to Manipulate Images 17. Section 4 - Combining Computer Vision with Other Techniques
18. Training with Minimal Data Points 19. Combining Computer Vision and NLP Techniques 20. Combining Computer Vision and Reinforcement Learning 21. Moving a Model to Production 22. Using OpenCV Utilities for Image Analysis 23. Other Books You May Enjoy Appendix

Leveraging CycleGAN

Imagine a scenario where we ask you to perform image translation from one class to another, but not give the input and the corresponding output images to train the model. However, we give you the images of both classes in two distinct folders. CycleGAN comes in handy in such a scenario.

In this section, we will learn how to train CycleGAN to convert the image of an apple into the image of an orange and vice versa. The Cycle in CycleGAN refers to the fact that we are translating (converting) an image from one class to another and back to the original class.

At a high level, we will have three separate loss values in this architecture (more detail is provided here):

  • Discriminator loss: This ensures that the object class is modified while training the model (as seen in the previous section).
  • Cycle loss: The loss of recycling an image from the generated image to the original to ensure that the surrounding pixels are not changed.
  • Identity loss: The loss when an image of...
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