ModuleNotFoundError: no module named 'matplotlib'

The ModuleNotFoundError: no module named 'matplotlib' error occurs when you have not installed the matplotlib package on your system.

To install matplotlib, run:

pip install matplotlib

You should now be able to import matplotlib:

import matplotlib.pyplot as plt

Next steps

OpenCV can be used with the open source supervision Python package.

supervision provides an extensive range of functionalities for working with computer vision models. With supervision, you can:

1. Process and filter detections and segmentation masks from a range of popular models (YOLOv5, Ultralytics YOLOv8, MMDetection, and more).
2. Process and filter classifications.
3. Compute confusion matrices.

And more! To learn about the full range of functionality in supervision, check out the supervision documentation.