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Python Image Processing Cookbook

You're reading from   Python Image Processing Cookbook Over 60 recipes to help you perform complex image processing and computer vision tasks with ease

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Product type Paperback
Published in Apr 2020
Publisher Packt
ISBN-13 9781789537147
Length 438 pages
Edition 1st Edition
Languages
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Author (1):
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Sandipan Dey Sandipan Dey
Author Profile Icon Sandipan Dey
Sandipan Dey
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Toc

Table of Contents (11) Chapters Close

Preface 1. Image Manipulation and Transformation 2. Image Enhancement FREE CHAPTER 3. Image Restoration 4. Binary Image Processing 5. Image Registration 6. Image Segmentation 7. Image Classification 8. Object Detection in Images 9. Face Recognition, Image Captioning, and More 10. Other Books You May Enjoy

Face detection with Viola-Jones/Haar-like features

Haar-like features are very useful image features used in object detection. They were introduced in the very first real-time face detector by Viola and Jones. Using integral images, Haar-like features of any size (scale) can be efficiently computed in constant time. The computation speed is the key advantage of a Haar-like feature over most other features. Using the Viola-Jones face detection algorithm, faces can be detected in an image using these Haar-like features. Each Haar-like feature acts as just a weak classifier, and hence a huge number of these features are required to detect a face with good accuracy. Therefore, a large number of features are computed for all possible locations and sizes of each Haar-like kernel, using the integral images. Then, an AdaBoost ensemble classifier is used to select important features from...

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