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OpenCV 4 with Python Blueprints

You're reading from   OpenCV 4 with Python Blueprints Build creative computer vision projects with the latest version of OpenCV 4 and Python 3

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Product type Paperback
Published in Mar 2020
Publisher Packt
ISBN-13 9781789801811
Length 366 pages
Edition 2nd Edition
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Authors (4):
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Michael Beyeler (USD) Michael Beyeler (USD)
Author Profile Icon Michael Beyeler (USD)
Michael Beyeler (USD)
Dr. Menua Gevorgyan Dr. Menua Gevorgyan
Author Profile Icon Dr. Menua Gevorgyan
Dr. Menua Gevorgyan
Michael Beyeler Michael Beyeler
Author Profile Icon Michael Beyeler
Michael Beyeler
Arsen Mamikonyan Arsen Mamikonyan
Author Profile Icon Arsen Mamikonyan
Arsen Mamikonyan
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Table of Contents (14) Chapters Close

Preface 1. Fun with Filters 2. Hand Gesture Recognition Using a Kinect Depth Sensor FREE CHAPTER 3. Finding Objects via Feature Matching and Perspective Transforms 4. 3D Scene Reconstruction Using Structure from Motion 5. Using Computational Photography with OpenCV 6. Tracking Visually Salient Objects 7. Learning to Recognize Traffic Signs 8. Learning to Recognize Facial Emotions 9. Learning to Classify and Localize Objects 10. Learning to Detect and Track Objects 11. Profiling and Accelerating Your Apps 12. Setting Up a Docker Container 13. Other Books You May Enjoy

Understanding the GTSRB dataset

The GTSRB dataset contains more than 50,000 images of traffic signs belonging to 43 classes.

This dataset was used by professionals in a classification challenge during the International Joint Conference on Neural Networks (IJCNN) in 2011. The GTSRB dataset is perfect for our purposes because it is large, organized, open source, and annotated.

Although the actual traffic sign is not necessarily a square or is in the center of each image, the dataset comes with an annotation file that specifies the bounding boxes for each sign.

A good idea before doing any sort of machine learning is usually to get a feel of the dataset, its qualities, and its challenges. Some good ideas include manually going through the data and understanding what are some characteristics of it, reading a data description—if it's available on the page—to understand...

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