Python OpenCV --电子邮件不发送从OpenCV保存的图像

import cv2
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.image import MIMEImage

# 读取图像
image = cv2.imread('image.jpg')

# 对图像进行处理
# ...

# 保存图像到本地
cv2.imwrite('processed_image.jpg', image)

# 发送电子邮件
# 邮件内容
msg = MIMEMultipart()
msg['From'] = 'sender@example.com'
msg['To'] = 'recipient@example.com'
msg['Subject'] = 'Processed Image'

# 邮件正文
body = MIMEText('Please find the processed image attached.')
msg.attach(body)

# 图像附件
with open('processed_image.jpg', 'rb') as f:
    img_data = f.read()
image = MIMEImage(img_data, name='processed_image.jpg')
msg.attach(image)

# 连接到SMTP服务器并发送邮件
smtp_server = 'smtp.example.com'
smtp_port = 587
smtp_username = 'username'
smtp_password = 'password'

with smtplib.SMTP(smtp_server, smtp_port) as server:
    server.starttls()
    server.login(smtp_username, smtp_password)
    server.send_message(msg)