imxtx

import cv2


def write_video_from_webcam():
    """Write a video file from webcam
    """
    vid_cap = cv2.VideoCapture(0)

    # set frame size and fps
    frame_width = int(vid_cap.get(cv2.CAP_PROP_FRAME_WIDTH))

imxtx

import cv2


def show_video(vid_cap: cv2.VideoCapture):
    """Show video from a VideoCapture object

    Args:
        vid_cap (cv2.VideoCapture): VideoCapture object
    """
    if vid_cap.isOpened() == False:

imxtx

import cv2
import numpy as np

# preprocess
image = cv2.imread("a.jpg").astype(float)  # convert uint8 to float
image = image / 255  # normalize to [0, 1]

# add noise
mean, std = 0, 0.1
noise = np.random.normal(mean, std, image.shape) # generate gaussian noise