为什么ThreadPoolExecutor工作，而ProcessPoolExecutor不工作？（已解决）

Question

我正在学习Python3中的线程和多处理。我尝试了一个使用ThreadPoolExecutor的简单程序，但当我改为ProcessPoolExecutor时，它没有执行给定的任何代码

from PIL import Image
from PIL import ImageFilter
import os

directory = r'C:\Users\admin\OneDrive\Pictures\My Photos'
imgs_file = []


for img_file in os.listdir(directory):
    if (img_file.endswith(".JPG") or img_file.endswith(".jpg")):
        imgs_file.append(img_file)

def image_filter(image_file):
    img = Image.open(image_file)
    img= img.filter(ImageFilter.GaussianBlur(radius = 9))
    img.save(f'Converted {image_file}')  

import concurrent.futures
with concurrent.futures.ProcessPoolExecutor() as p:
    p.map(image_filter, imgs_file)