Create a Person Counter Python Script

Table of Contents

1. Introduction
2. Understanding Live Person and Overall Person Count
3. Two Ways to Count Persons
4. Setting Up the Person Counter Python Script
5. Defining Variables for Live Person Count and Overall Person Count
6. Using Tracker Dot Update to Get Live Person Count
7. Creating Object ID List to Hold Overall Person Count
8. Displaying Live Person Count and Overall Person Count
9. Running the Person Counter Python Script
10. Conclusion

Introduction

In this article, we will discuss how to create a person counter Python script. This script will be able to count the number of persons Present in a frame. We will explore two different methods to count the live person count and the overall person count. By the end of this article, you will have a clear understanding of how to perform person counting in Python.

Understanding Live Person and Overall Person Count

Before we dive into the implementation, let's understand the difference between the live person count and the overall person count. In a video frame, the live person count refers to the number of individuals currently present in the frame. On the other HAND, the overall person count includes all the individuals who have appeared in the frame, even if they are no longer present.

Two Ways to Count Persons

In this article, we will discuss two different methods to count the number of persons in a frame. The first method involves using a person tracking algorithm that provides the live person count. The Second method involves creating an object ID list to keep track of all the individuals seen in the frame, resulting in the overall person count.

Setting Up the Person Counter Python Script

To begin, let's set up the person counter Python script. Create a new Python file named "person_counter.py" and copy the code from the person tracking script. This will serve as our base code for the person counter.

Defining Variables for Live Person Count and Overall Person Count

In the person counter script, we need to define two variables: LPC count (live person count) and OPC count (overall person count). These variables will hold the respective counts as we process the frame.

Using Tracker Dot Update to Get Live Person Count

To obtain the live person count, we can leverage the "tracker.update" function. This function provides us with a list of object IDs present in the frame, which correspond to individuals. We can iterate over these object IDs and check if they are already present in the object ID list. If not, we add them to the list.

Creating Object ID List to Hold Overall Person Count

To calculate the overall person count, we need to maintain a list of unique object IDs seen in the frame. We can create an "object_id_list" to store the object IDs. Before adding an object ID to the list, we check if it already exists to avoid duplications.

Displaying Live Person Count and Overall Person Count

Once we have the live person count and overall person count, we can display them on the frame. By using OpenCV, we can overlay the counts as text on the frame. This way, we can Visualize the counts in real-time.

Running the Person Counter Python Script

To run the person counter script, initialize your OpenVINO environment. If you're not using OpenVINO, ignore this step and directly run the code. Execute the "person_counter.py" script and wait for the frame to appear.

Conclusion

In this article, we have learned how to create a person counter Python script. We covered two methods to count the number of persons in a frame: live person count and overall person count. By implementing this script, you can accurately track and count individuals in various scenarios.