Preview CSI camera image

1. Implementation principle

Use the CSICamera() function to capture the image from the CSI camera.

2. Implementation effect

cd ~/opencv

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python3 18.camera_preview_csi.py # The program opens video0 by default, open other cameras and modify the device number by yourself

Note: Select the camera image and press q to exit the program!

3. Implementation code

​x
import cv2
from jetcam.csi_camera import CSICamera
​
def preview_usb_camera():
    cap = CSICamera(capture_device=0, width=640, height=480)
    while True:
        frame = cap.read()
        if frame is not None:
            cv2.imshow('CSI Camera Preview', cv2.resize(frame, (640, 480)))
            if cv2.waitKey(1) & 0xFF == ord('q'):
                break
        else:
            print("Error: Could not open CSI camera.")
            break
​
    cap.release()
    cv2.destroyAllWindows()
​
preview_usb_camera()