ultralytics/docs/en/guides/analytics.md

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Analytics using Ultralytics YOLO11

Introduction

This guide provides a comprehensive overview of three fundamental types of data visualizations: line graphs, bar plots, and pie charts. Each section includes step-by-step instructions and code snippets on how to create these visualizations using Python.

Watch: How to generate Analytical Graphs using Ultralytics | Line Graphs, Bar Plots, Area and Pie Charts

Visual Samples

Line Graph	Bar Plot	Pie Chart

Why Graphs are Important

• Line graphs are ideal for tracking changes over short and long periods and for comparing changes for multiple groups over the same period.
• Bar plots, on the other hand, are suitable for comparing quantities across different categories and showing relationships between a category and its numerical value.
• Lastly, pie charts are effective for illustrating proportions among categories and showing parts of a whole.

!!! example "Analytics using Ultralytics YOLO"

=== "CLI"

    ```bash
    yolo solutions analytics show=True

    # Pass the source
    yolo solutions analytics source="path/to/video.mp4"

    # Generate the pie chart
    yolo solutions analytics analytics_type="pie" show=True

    # Generate the bar plots
    yolo solutions analytics analytics_type="bar" show=True

    # Generate the area plots
    yolo solutions analytics analytics_type="area" show=True
    ```

=== "Python"

    ```python
    import cv2

    from ultralytics import solutions

    cap = cv2.VideoCapture("path/to/video.mp4")
    assert cap.isOpened(), "Error reading video file"

    # Video writer
    w, h, fps = (int(cap.get(x)) for x in (cv2.CAP_PROP_FRAME_WIDTH, cv2.CAP_PROP_FRAME_HEIGHT, cv2.CAP_PROP_FPS))
    out = cv2.VideoWriter(
        "analytics_output.avi",
        cv2.VideoWriter_fourcc(*"MJPG"),
        fps,
        (1280, 720),  # this is fixed
    )

    # Initialize analytics object
    analytics = solutions.Analytics(
        show=True,  # display the output
        analytics_type="line",  # pass the analytics type, could be "pie", "bar" or "area".
        model="yolo11n.pt",  # path to the YOLO11 model file
        # classes=[0, 2],  # display analytics for specific detection classes
    )

    # Process video
    frame_count = 0
    while cap.isOpened():
        success, im0 = cap.read()
        if success:
            frame_count += 1
            results = analytics(im0, frame_count)  # update analytics graph every frame

            # print(results)  # access the output

            out.write(results.plot_im)  # write the video file
        else:
            break

    cap.release()
    out.release()
    cv2.destroyAllWindows()  # destroy all opened windows
    ```

Analytics Arguments

Here's a table outlining the Analytics arguments:

{% from "macros/solutions-args.md" import param_table %} {{ param_table(["model", "analytics_type"]) }}

You can also leverage different track arguments in the Analytics solution.

{% from "macros/track-args.md" import param_table %} {{ param_table(["tracker", "conf", "iou", "classes", "verbose", "device"]) }}

Additionally, the following visualization arguments are supported:

{% from "macros/visualization-args.md" import param_table %} {{ param_table(["show", "line_width"]) }}

Conclusion

Understanding when and how to use different types of visualizations is crucial for effective data analysis. Line graphs, bar plots, and pie charts are fundamental tools that can help you convey your data's story more clearly and effectively. The Ultralytics YOLO11 Analytics solution provides a streamlined way to generate these visualizations from your object detection and tracking results, making it easier to extract meaningful insights from your visual data.

FAQ

How do I create a line graph using Ultralytics YOLO11 Analytics?

To create a line graph using Ultralytics YOLO11 Analytics, follow these steps:

1. Load a YOLO11 model and open your video file.
2. Initialize the Analytics class with the type set to "line."
3. Iterate through video frames, updating the line graph with relevant data, such as object counts per frame.
4. Save the output video displaying the line graph.

Example:

import cv2

from ultralytics import solutions

cap = cv2.VideoCapture("path/to/video.mp4")
assert cap.isOpened(), "Error reading video file"

w, h, fps = (int(cap.get(x)) for x in (cv2.CAP_PROP_FRAME_WIDTH, cv2.CAP_PROP_FRAME_HEIGHT, cv2.CAP_PROP_FPS))

out = cv2.VideoWriter(
    "ultralytics_analytics.avi",
    cv2.VideoWriter_fourcc(*"MJPG"),
    fps,
    (1280, 720),  # this is fixed
)

analytics = solutions.Analytics(
    analytics_type="line",
    show=True,
)

frame_count = 0
while cap.isOpened():
    success, im0 = cap.read()
    if success:
        frame_count += 1
        results = analytics(im0, frame_count)  # update analytics graph every frame
        out.write(results.plot_im)  # write the video file
    else:
        break

cap.release()
out.release()
cv2.destroyAllWindows()

For further details on configuring the Analytics class, visit the Analytics using Ultralytics YOLO11 section.

What are the benefits of using Ultralytics YOLO11 for creating bar plots?

Using Ultralytics YOLO11 for creating bar plots offers several benefits:

1. Real-time Data Visualization: Seamlessly integrate object detection results into bar plots for dynamic updates.
2. Ease of Use: Simple API and functions make it straightforward to implement and visualize data.
3. Customization: Customize titles, labels, colors, and more to fit your specific requirements.
4. Efficiency: Efficiently handle large amounts of data and update plots in real-time during video processing.

Use the following example to generate a bar plot:

import cv2

from ultralytics import solutions

cap = cv2.VideoCapture("path/to/video.mp4")
assert cap.isOpened(), "Error reading video file"

w, h, fps = (int(cap.get(x)) for x in (cv2.CAP_PROP_FRAME_WIDTH, cv2.CAP_PROP_FRAME_HEIGHT, cv2.CAP_PROP_FPS))

out = cv2.VideoWriter(
    "ultralytics_analytics.avi",
    cv2.VideoWriter_fourcc(*"MJPG"),
    fps,
    (1280, 720),  # this is fixed
)

analytics = solutions.Analytics(
    analytics_type="bar",
    show=True,
)

frame_count = 0
while cap.isOpened():
    success, im0 = cap.read()
    if success:
        frame_count += 1
        results = analytics(im0, frame_count)  # update analytics graph every frame
        out.write(results.plot_im)  # write the video file
    else:
        break

cap.release()
out.release()
cv2.destroyAllWindows()

To learn more, visit the Bar Plot section in the guide.

Why should I use Ultralytics YOLO11 for creating pie charts in my data visualization projects?

Ultralytics YOLO11 is an excellent choice for creating pie charts because:

1. Integration with Object Detection: Directly integrate object detection results into pie charts for immediate insights.
2. User-Friendly API: Simple to set up and use with minimal code.
3. Customizable: Various customization options for colors, labels, and more.
4. Real-time Updates: Handle and visualize data in real-time, which is ideal for video analytics projects.

Here's a quick example:

import cv2

from ultralytics import solutions

cap = cv2.VideoCapture("path/to/video.mp4")
assert cap.isOpened(), "Error reading video file"

w, h, fps = (int(cap.get(x)) for x in (cv2.CAP_PROP_FRAME_WIDTH, cv2.CAP_PROP_FRAME_HEIGHT, cv2.CAP_PROP_FPS))

out = cv2.VideoWriter(
    "ultralytics_analytics.avi",
    cv2.VideoWriter_fourcc(*"MJPG"),
    fps,
    (1280, 720),  # this is fixed
)

analytics = solutions.Analytics(
    analytics_type="pie",
    show=True,
)

frame_count = 0
while cap.isOpened():
    success, im0 = cap.read()
    if success:
        frame_count += 1
        results = analytics(im0, frame_count)  # update analytics graph every frame
        out.write(results.plot_im)  # write the video file
    else:
        break

cap.release()
out.release()
cv2.destroyAllWindows()

For more information, refer to the Pie Chart section in the guide.

Can Ultralytics YOLO11 be used to track objects and dynamically update visualizations?

Yes, Ultralytics YOLO11 can be used to track objects and dynamically update visualizations. It supports tracking multiple objects in real-time and can update various visualizations like line graphs, bar plots, and pie charts based on the tracked objects' data.

Example for tracking and updating a line graph:

import cv2

from ultralytics import solutions

cap = cv2.VideoCapture("path/to/video.mp4")
assert cap.isOpened(), "Error reading video file"

w, h, fps = (int(cap.get(x)) for x in (cv2.CAP_PROP_FRAME_WIDTH, cv2.CAP_PROP_FRAME_HEIGHT, cv2.CAP_PROP_FPS))

out = cv2.VideoWriter(
    "ultralytics_analytics.avi",
    cv2.VideoWriter_fourcc(*"MJPG"),
    fps,
    (1280, 720),  # this is fixed
)

analytics = solutions.Analytics(
    analytics_type="line",
    show=True,
)

frame_count = 0
while cap.isOpened():
    success, im0 = cap.read()
    if success:
        frame_count += 1
        results = analytics(im0, frame_count)  # update analytics graph every frame
        out.write(results.plot_im)  # write the video file
    else:
        break

cap.release()
out.release()
cv2.destroyAllWindows()

To learn about the complete functionality, see the Tracking section.

What makes Ultralytics YOLO11 different from other object detection solutions like OpenCV and TensorFlow?

Ultralytics YOLO11 stands out from other object detection solutions like OpenCV and TensorFlow for multiple reasons:

1. State-of-the-art Accuracy: YOLO11 provides superior accuracy in object detection, segmentation, and classification tasks.
2. Ease of Use: User-friendly API allows for quick implementation and integration without extensive coding.
3. Real-time Performance: Optimized for high-speed inference, suitable for real-time applications.
4. Diverse Applications: Supports various tasks including multi-object tracking, custom model training, and exporting to different formats like ONNX, TensorRT, and CoreML.
5. Comprehensive Documentation: Extensive documentation and blog resources to guide users through every step.

For more detailed comparisons and use cases, explore our Ultralytics Blog.