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ModuleNotFoundError: no module named 'cv2'

Tutorial

The ModuleNotFoundError: no module named 'cv2' code indicates that your Python environment cannot find the OpenCV package.

In most cases, this error is caused by not having installed OpenCV in your current environment (i.e. the virtual environment in which you are working).

To install OpenCV, run:


pip install opencv-python

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.