Raspberry Pi Camera Module 3 image preview with Python

cam_test.py

from picamera2 import Picamera2
import cv2

# Initialize the camera
picam2 = Picamera2()
picam2.start()

try:
    while True:
        # Capture frame from the camera
        frame = picam2.capture_array()
        
        # Convert color from RGB to BGR for OpenCV
        frame = cv2.cvtColor(frame, cv2.COLOR_RGB2BGR)
        
        # Display the frame
        cv2.imshow("Camera Feed", frame)
        
        # Press 'q' to exit
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
            
finally:
    # Close all OpenCV windows
    cv2.destroyAllWindows()
    # Stop the camera
    picam2.stop()