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OpenCV 4 for Secret Agents

You're reading from   OpenCV 4 for Secret Agents Use OpenCV 4 in secret projects to classify cats, reveal the unseen, and react to rogue drivers

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Product type Paperback
Published in Apr 2019
Publisher Packt
ISBN-13 9781789345360
Length 336 pages
Edition 2nd Edition
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Authors (2):
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Joseph Howse Joseph Howse
Author Profile Icon Joseph Howse
Joseph Howse
Arun Ponnusamy Arun Ponnusamy
Author Profile Icon Arun Ponnusamy
Arun Ponnusamy
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Table of Contents (16) Chapters Close

Preface 1. Section 1: The Briefing FREE CHAPTER
2. Preparing for the Mission 3. Searching for Luxury Accommodations Worldwide 4. Section 2: The Chase
5. Training a Smart Alarm to Recognize the Villain and His Cat 6. Controlling a Phone App with Your Suave Gestures 7. Equipping Your Car with a Rearview Camera and Hazard Detection 8. Creating a Physics Simulation Based on a Pen and Paper Sketch 9. Section 3: The Big Reveal
10. Seeing a Heartbeat with a Motion-Amplifying Camera 11. Stopping Time and Seeing like a Bee 12. Making WxUtils.py Compatible with Raspberry Pi
13. Learning More about Feature Detection in OpenCV
14. Running with Snakes (or, First Steps with Python)
15. Other Books You May Enjoy

Summary

Like the previous chapter, this chapter has dealt with classification tasks, as well as interfaces among OpenCV, a source of images, and a GUI. This time, our classification labels have more objective meanings (a species or an individual's identity), so the classifier's success or failure is more obvious. To meet the challenge, we used much bigger sets of training images, we preprocessed the training images for greater consistency, and we applied two tried-and-true classification techniques in sequence (either Haar cascades or LBP cascades for detection and then LBPH for recognition).

The methodology presented in this chapter, as well as the entire Interactive Recognizer app and some of the other code, generalizes well to other original work in detection and recognition. With the right training images, you could detect and recognize many more animals in many...

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