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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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Toc

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

Implementing a Sort tracker

The Sort algorithm is a simple yet robust real-time tracking algorithm for the multiple-object tracking of detected objects in video sequences. The algorithm has a mechanism to associate detections and trackers that results in a maximum of one detection box for each tracked object.

For each tracked object, the algorithm creates an instance of a single object-tracking class. Based on physical principles such as an object cannot rapidly change size or speed, the class instance can predict the feature location of the object and maintain tracking from frame to frame. The latter is achieved with the help of the Kalman filter.

We import the modules that we will use in the implementation of the algorithm as follows:

import numpy as np
from scipy.optimize import linear_sum_assignment
from typing import Tuple
import cv2

As usual, the main dependencies are numpy...

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