Why can't the Python interpreter find the opencv installed in the virtual environment?

My python version in my virtual environment is 3.9.18.This is the code running on the terminal，OEM is the name of my virtual environment.

(base) PS F:\OEM-Fewshot-Challenge\OEM-Fewshot-Challenge\src> conda activate OEM(OEM) PS F:\OEM-Fewshot-Challenge\OEM-Fewshot-Challenge\src> py test.pyTraceback (most recent call last):  File "F:\OEM-Fewshot-Challenge\OEM-Fewshot-Challenge\src\test.py", line 2, in <module>    import cv2ModuleNotFoundError: No module named 'cv2'

I'm pretty sure I had installed the opencv library in my virtual environment.I check it again and run the test.py but the error still remain.

(OEM) PS F:\OEM-Fewshot-Challenge\OEM-Fewshot-Challenge\src> pip list | findstr opencvopencv-python               4.6.0.66